Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ☒ No ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes ☒ No ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer”, “accelerated filer”, “smaller reporting company”, and “emerging growth company” in rule 12b-2 of the Exchange Act.

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes☐ No ☒

	September 30, 2019			December 31, 2018			March 31, 2020			December 31, 2019
Assets
Current assets:
Cash and cash equivalents	$	47,851		$	27,709		$	26,437		$	28,747
Restricted cash		4,448			7,003			9,281			4,646
Accounts receivable, net
Third parties		100,613			71,034
Related parties		252			583
Accounts receivable - trade, net of allowance for doubtful accounts of $417 as of March 31, 2020 and $393 as of December 31, 2019								86,270			96,865
Other receivables								10,020			8,124
Suppliers and others		8,002			12,923
Related parties		1			65
Contract assets		9,351			11,381			3,128			16,680
Inventories		43,046			33,868			39,912			35,439
Prepaid expenses and other current assets		6,253			4,185			5,974			4,185
Total current assets		219,817			168,751			181,022			194,686
Property, plant and equipment, net		6,575			5,518			6,716			6,769
Right-of-use assets from operating leases		18,349			—			18,778			20,469
Goodwill		3,977			3,977			3,977			3,977
Intangible assets, net		14,539			5,649			11,464			12,381
Deferred tax assets		1,691			2,752			2,364			1,622
Long-term restricted cash		501			936
Other assets		2,784			2,424			5,053			6,243
Total assets	$	268,233		$	190,007		$	229,374		$	246,147
Liabilities, Stockholders’ Equity and Non-controlling Interest
Liabilities and Stockholders’ Equity
Current liabilities:
Accounts payable - trade							$	35,634		$	38,427
Third parties	$	43,320		$	36,865
Related parties		96			1,743
Short-term debt - bank and trade facilities		34,606			31,762			12,323			17,484
Other payables								1,966			3,278
Third parties		1,652			1,792
Related parties		2,711			1,281
Contract liabilities - current		3,609			8,511			3,305			3,567
Operating lease liabilities - current		3,496			—			4,005			4,201
Accrued and other liabilities		10,389			11,517			10,203			12,844
Total current liabilities		99,879			93,471			67,436			79,801
Long-term debt
Bank and trade facilities		10,407			—			—			9,937
Related party		9,049			14,142			27,348			9,096
Contract liabilities - non-current		2,597			1,801			3,152			3,230
Deferred tax liabilities		1,021			—
Operating lease liabilities - non-current		15,957			—			16,667			18,154
Pension liabilities		13,269			—			15,768			17,671
Other long-term liabilities		1,658			2,739			1,714			1,710
Total liabilities		153,837			112,153			132,085			139,599
Commitments and contingencies (Note 15)
Stockholders’ equity and non-controlling interest:
Common stock, authorized 36,000 shares, 21,388 and 16,587 shares outstanding as of September 30, 2019 and December 31, 2018, respectively, at $0.001 par value		21			16
Stockholders’ equity:
Common stock, authorized 36,000 shares, 21,513 and 21,419 shares outstanding as of March 31, 2020 and December 31, 2019, respectively, at $0.001 par value								21			21
Additional paid-in capital		138,860			93,192			141,191			139,700
Accumulated other comprehensive loss		(5,445	)		(192	)		(5,918	)		(3,939	)
Accumulated deficit		(19,040	)		(15,777	)		(38,005	)		(29,234	)
Total stockholders’ equity		114,396			77,239			97,289			106,548
Non-controlling interest		—			615
Total stockholders’ equity and non-controlling interest		114,396			77,854
Total liabilities, stockholders’ equity and non-controlling interest	$	268,233		$	190,007
Total liabilities and stockholders’ equity							$	229,374		$	246,147

See accompanying notes to unaudited condensed consolidated financial statements.

Unaudited Condensed Consolidated Statements of Comprehensive ~~Income (Loss)~~Loss

	Three Months Ended						Nine Months Ended						Three Months Ended
	September 30,						September 30,						March 31,
	2019			2018			2019			2018			2020			2019
Net revenue:
Third parties	$	71,292		$	70,227		$	227,407		$	203,317		$	47,318		$	73,234
Related parties		232			1,687			1,870			4,358			162			855
Total net revenue		71,524			71,914			229,277			207,675			47,480			74,089
Cost of revenue:
Products and services - third parties		48,755			46,852			151,805			135,208			30,956			48,172
Products and services - related parties		190			1,478			1,427			3,677			133			639
Amortization of intangible assets		402			153			1,216			459			396			408
Total cost of revenue		49,347			48,483			154,448			139,344			31,485			49,219
Gross profit		22,177			23,431			74,829			68,331			15,995			24,870
Operating expenses:
Research and product development		9,898			8,655			29,512			26,346			9,600			10,184
Selling, marketing, general and administrative		15,716			11,106			45,684			35,212			13,617			15,039
Amortization of intangible assets		464			131			1,406			393			372			472
Total operating expenses		26,078			19,892			76,602			61,951			23,589			25,695
Operating income (loss)		(3,901	)		3,539			(1,773	)		6,380
Operating loss														(7,594	)		(825	)
Interest income		374			42			524			203			70			88
Interest expense		(1,124	)		(447	)		(3,239	)		(1,330	)		(643	)		(871	)
Other income (loss), net		944			(572	)		2,517			(859	)
Income (loss) before income taxes		(3,707	)		2,562			(1,971	)		4,394
Income tax provision		289			735			1,098			1,071
Net income (loss)		(3,996	)		1,827			(3,069	)		3,323
Loss on extinguishment of debt														(1,369	)		—
Other income, net														760			228
Loss before income taxes														(8,776	)		(1,380	)
Income tax (benefit) provision														(5	)		77
Net loss														(8,771	)		(1,457	)
Net income attributable to non-controlling interest		37			29			194			2			—			181
Net income (loss) attributable to DASAN Zhone Solutions, Inc.		(4,033	)		1,798			(3,263	)		3,321
Net loss attributable to DASAN Zhone Solutions, Inc.														(8,771	)		(1,638	)

Foreign currency translation adjustments		(2,426	)		391			(4,123	)		(1,839	)		(3,435	)		(1,124	)
Actuarial gain (loss)		38			—			(1,115	)		—
Comprehensive income (loss)		(6,384	)		2,218			(8,307	)		1,484
Comprehensive income (loss) attributable to non- controlling interest		31			16			209			(3	)
Comprehensive income (loss) attributable to DASAN Zhone Solutions, Inc.	$	(6,415	)	$	2,202		$	(8,516	)	$	1,487
Actuarial gain														1,456			—
Comprehensive loss														(10,750	)		(2,581	)
Comprehensive loss attributable to non- controlling interest														—			180
Comprehensive loss attributable to DASAN Zhone Solutions, Inc.													$	(10,750	)	$	(2,761	)

Net income (loss) per share attributable to DASAN Zhone Solutions, Inc.
Net loss per share attributable to DASAN Zhone Solutions, Inc.
Basic	$	(0.19	)	$	0.11		$	(0.17	)	$	0.20		$	(0.41	)	$	(0.10	)
Diluted	$	(0.19	)	$	0.11		$	(0.17	)	$	0.20		$	(0.41	)	$	(0.10	)
Weighted average shares outstanding used to compute basic net income (loss) per share		21,384			16,683			18,732			16,425
Weighted average shares outstanding used to compute diluted net income (loss) per share		21,384			16,891			18,732			16,640
Weighted average shares outstanding used to compute basic net loss per share														21,474			16,593
Weighted average shares outstanding used to compute diluted net loss per share														21,474			16,593

See accompanying notes to unaudited condensed consolidated financial statements.

Unaudited Condensed Consolidated Statements of Stockholders' Equity and Non-Controlling Interest

Common stock

Additional
paid-in

Accumulated
other
comprehensive

Accumulated

Total
stockholders'

Non-
controlling

Total
stockholders'
equity and
non-
controlling

Shares

Amount

capital

income (loss)

deficit

equity

interest

interest

For the Nine-Month Period
   Ended September 30, 2019:

Balance as of December 31,
   2018

16,587

$
16

$
93,192

$
(192
)

$
(15,777
)

$
77,239

$
615

$
77,854

Stock-based compensation

9

—

825

—

—

825

—

825

Net income (loss)

—

—

—

—

(1,638
)

(1,638
)

181

(1,457
)
Other comprehensive loss

—

—

—

(1,124
)

—

(1,124
)

(1
)

(1,125
)
Balance as of March 31, 2019

16,596

16

94,017

(1,316
)

(17,415
)

75,302

795

76,097

Issuance of common stock in
   public offering, net of issuance costs

4,718

5

42,504

—

—

42,509

—

42,509

Exercise of stock options and
   restricted stock grant

55

—

473

—

—

473

—

473

Stock-based compensation

11

—

811

—

—

811

—

811

Net income (loss)

—

—

—

—

2,408

2,408

(24
)

2,384

Other comprehensive income (loss)

—

—

—

(1,748
)

—

(1,748
)

23

(1,725
)
Balance as of June 30, 2019

21,380

21

137,805

(3,064
)

(15,007
)

119,755

794

120,549

Purchase of non-controlling interest
    in subsidiary

—

—

(127
)

—

—

(127
)

(823
)

(950
)
Stock-based compensation

8

—

1,182

—

—

1,182

—

1,182

Net income (loss)

—

—

—

—

(4,033
)

(4,033
)

37

(3,996
)
Other comprehensive loss

—

—

—

(2,381
)

—

(2,381
)

(8
)

(2,389
)
Balance as of September 30, 2019

21,388

$
21

$
138,860

$
(5,445
)

$
(19,040
)

$
114,396

$
—

$
114,396

For the Nine-Month Period
   Ended September 30, 2018:

Balance as of December 31,
   2017

16,410

$
16

$
90,198

$
1,871

$
(18,852
)

$
73,233

$
534

$
73,767

ASC 606 opening balance
   adjustment

—

—

—

—

342

342

—

342

Exercise of stock options and
   restricted stock grant

21

—

111

—

—

111

—

111

Stock-based compensation

—

—

363

—

—

363

—

363

Net income

—

—

—

—

107

107

34

141

Other comprehensive income

—

—

—

257

—

257

30

287

Balance as of March 31, 2018

16,431

16

90,672

2,128

(18,403
)

74,413

598

75,011

ASC 606 opening balance
   adjustment

—

—

—

—

(1
)

(1
)

—

(1
)
Exercise of stock options and
   restricted stock grant

19

—

77

—

—

77

—

77

Stock-based compensation

—

—

377

—

—

377

—

377

Net income

—

—

—

—

1,416

1,416

(61
)

1,355

Other comprehensive loss

—

—

—

(2,527
)

—

(2,527
)

(22
)

(2,549
)
Balance as of June 30, 2018

16,450

16

91,126

(399
)

(16,988
)

73,755

515

74,270

Exercise of stock options and
   restricted stock grant

116

—

665

—

—

665

—

665

Stock-based compensation

—

—

617

—

—

617

617

Net income (loss)

—

—

—

—

1,798

1,798

29

1,827

Other comprehensive income (loss)

—

—

—

404

—

404

(13
)

391

Balance as of September 30, 2018

16,566

$
16

$
92,408

$
5

$
(15,190
)

$
77,239

$
531

$
77,770

	Common stock				Additional paid-in		Accumulated other comprehensive			Accumulated			Total stockholders'			Non- controlling			Total stockholders' equity and non- controlling
	Shares		Amount		capital		income (loss)			deficit			equity			interest			interest
For the Three-Month Period Ended March 31, 2020:
Balance as of December 31, 2019		21,419	$	21	$	139,700	$	(3,939	)	$	(29,234	)	$	106,548		$	—		$	106,548
Exercise of stock options and restricted stock grant		94		—		709		—			—			709			—			709
Stock-based compensation		—		—		782		—			—			782			—			782
Net loss		—		—		—		—			(8,771	)		(8,771	)		—			(8,771	)
Other comprehensive loss		—		—		—		(1,979	)		—			(1,979	)		—			(1,979	)
Balance as of March 31, 2020		21,513	$	21	$	141,191	$	(5,918	)	$	(38,005	)	$	97,289		$	—		$	97,289

For the Three-Month Period Ended March 31, 2019:
Balance as of December 31, 2018		16,587	$	16	$	93,192	$	(192	)	$	(15,777	)	$	77,239		$	615		$	77,854
Stock-based compensation		9		—		825		—			—			825			—			825
Net loss		—		—		—		—			(1,638	)		(1,638	)		181			(1,457	)
Other comprehensive loss		—		—		—		(1,124	)		—			(1,124	)		(1	)		(1,125	)
Balance as of March 31, 2019		16,596	$	16	$	94,017	$	(1,316	)	$	(17,415	)	$	75,302		$	795		$	76,097

See accompanying notes to unaudited condensed consolidated financial statements.

	Nine Months Ended						Three Months Ended
	September 30,						March 31,
	2019			2018			2020			2019
Cash flows from operating activities:
Net income (loss)	$	(3,069	)	$	3,323
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Net loss							$	(8,771	)	$	(1,457	)
Adjustments to reconcile net loss to net cash Provided by (used in) operating activities:
Depreciation and amortization		4,110			2,033			1,256			1,417
Loss on extinguishment of debt								1,343			—
Amortization of deferred financing costs		453			—			141			73
Bargain purchase gain on acquisition		(334	)		—			—			(334	)
Stock-based compensation		2,818			1,357			782			825
Provision for inventory write-down		2,289			753			1,421			14
Allowance for doubtful accounts		148			2			24			223
Provision for sales returns		413			839			(231	)		218
Unrealized loss (gain) on foreign currency transactions		(2,080	)		226
Unrealized gain on foreign currency transactions								(1,983	)		(95	)
Deferred taxes		884			(56	)		(820	)		19
Changes in operating assets and liabilities:
Accounts receivable		(29,724	)		(15,377	)		9,109			7,930
Contract assets		819			(5,984	)		14,129			(6,967	)
Inventories		(3,454	)		(21,967	)		(7,048	)		3,828
Prepaid expenses and other assets		3,859			(1,958	)		(3,285	)		(207	)
Accounts payable		9,275			24,790			(1,261	)		(3,966	)
Contract liabilities		(4,246	)		—			(275	)		(5,166	)
Accrued and other liabilities		(4,049	)		(3,695	)		(3,937	)		(1,331	)
Net cash used in operating activities		(21,888	)		(15,714	)
Net cash provided by (used in) operating activities								594			(4,976	)
Cash flows from investing activities:
Purchases of property, plant and equipment		(1,461	)		(753	)		(560	)		(109	)
Proceeds from disposal of property and equipment and other assets		—			1
Acquisition of business, net of cash acquired		(4,697	)		—			—			(4,697	)
Net cash used in investing activities		(6,158	)		(752	)		(560	)		(4,806	)
Cash flows from financing activities:
Proceeds from issuance of common stock in public offering, net of issuance costs		42,509			—
Proceeds from short-term borrowings and line of credit		25,884			61,419			1,307			4,324
Repayments of short-term borrowings and line of credit		(38,486	)		(48,739	)		(4,167	)		—
Proceeds from long-term borrowings		25,000			—			—			25,000
Repayments of long-term borrowings		(1,250	)		—
Repayments of borrowings								(13,125	)		(17,052	)
Proceeds from related party term loan		—			6,098			18,361			—
Repayments of related party term loan		(5,000	)		(4,460	)		—			(5,000	)
Deferred financing costs		(1,998	)		—			—			(2,184	)
Purchase of non-controlling interest		(950	)		—
Proceeds from exercise of stock options		473			853			709			—
Net cash provided by financing activities		46,182			15,171			3,085			5,088
Effect of exchange rate changes on cash, cash equivalents, and restricted cash		(984	)		(1,417	)		(873	)		(306	)
Net increase in cash, cash equivalents and restricted cash		17,152			(2,712	)		2,246			(5,000	)
Cash, cash equivalents and restricted cash at beginning of period		35,648			31,412			33,635			35,648
Cash, cash equivalents and restricted cash at end of period	$	52,800		$	28,700		$	35,881		$	30,648

Reconciliation of cash, cash equivalents and restricted cash to statement of financial position							$	26,437		$	20,872
Cash and cash equivalents	$	47,851		$	20,028			9,281			9,165
Restricted cash		4,448			7,825			163			611
Long-term restricted cash		501			847		$	35,881		$	30,648
	$	52,800		$	28,700
Supplemental disclosure of cash flow information:
Shares of the Company's common stock held in escrow								—			—
Cash paid during the period for:
Interest - bank and trade facilities							$	424		$	642
Interest - related party							$	152		$	173
Income taxes							$	1,504		$	589

See accompanying notes to unaudited condensed consolidated financial statements.

DASAN Zhone Solutions, Inc. (referred to, collectively with its subsidiaries, as “DZS” or the “Company”) is a global provider of ultra-broadband network access solutions and communications platforms deployed by advanced Tier 1, 2 and 3 service providers and enterprise customers. The Company provides a wide array of reliable, cost-effective networking technologies, including broadband access, Ethernet switching, mobile backhaul, Passive Optical LAN and software-defined networks, to a diverse customer base that includes more than ~~900~~1,200 customers in more than 80120 countries worldwide.

DZS was incorporated under the laws of the state of Delaware in June 1999, under the name Zhone Technologies, Inc. On September 9, 2016, the Company acquired Dasan Network Solutions, Inc., a California corporation (“DNS”), through the merger of a wholly owned subsidiary of the Company with and into DNS, with DNS surviving as a wholly owned subsidiary of the Company (the “Merger”). At the effective time of the Merger, all issued and outstanding shares of capital stock of DNS held by DASAN Networks, Inc. (“DNI”) were canceled and converted into the right to receive shares of the Company's common stock in an amount equal to 58% of the issued and outstanding shares of the Company's common stock immediately following the Merger. In connection with the Merger, the Company changed its name from Zhone Technologies, Inc. to DASAN Zhone Solutions, Inc.

The Company is headquartered in ~~Oakland,~~Alameda, California with flexible in-house production facilities in Seminole, Florida and ~~Hanover,~~Hannover, Germany, ~~(acquired as part of the Keymile Acquisition (defined below) in January 2019),~~ and contract manufacturers located in China, India, Korea and Vietnam. The Company also maintains offices to provide sales and customer support at global locations. On March 2, 2020, the Company announced its plans to relocate its corporate headquarters from Alameda, California to Plano, Texas and to establish a new U.S.-based Engineering Center of Excellence in Plano.

As of September 30, 2019, DNI owned approximately 44.4% of the outstanding shares of the Company's common stock. As a result, DNI is able to significantly influence corporate and management policies and the outcome of any corporate transaction or other matter submitted to the Company’s stockholders for approval. Such transactions may include mergers and acquisitions, sales of all or some of the Company’s assets or purchases of assets, and other significant corporate transactions. The interests of DNI may not coincide with the interests of the Company's other stockholders or with holders of the Company's indebtedness. See Note 11 and Note 15 to the unaudited condensed consolidated financial statements for additional information.

For a complete description of what the Company believes to be the critical accounting policies and estimates used in the preparation of its unaudited condensed consolidated financial statements, refer to the Company’s Annual Report on Form 10-K for the year ended December 31, 2018.

The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with U.S. GAAP for interim financial information and with the instructions to Form 10-Q and Article 8 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by U.S. GAAP for complete financial statements. These financial statements include the accounts of the Company, its wholly owned subsidiaries and a subsidiary in which it had a controlling interest. All inter-company transactions and balances have been eliminated in consolidation.

The unaudited condensed consolidated financial statements reflect all adjustments (consisting only of normal recurring adjustments) that, in the opinion of management, are necessary for a fair presentation of the results for the interim periods presented. ~~All intercompany transactions and balances have been eliminated in consolidation.~~ The results of operations for the current interim period are not necessarily indicative of results to be expected for the current year or any other period. These unaudited condensed consolidated financial statements should be read in conjunction with the consolidated financial statements of the Company and notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, ~~2018~~2019 filed with the Securities and Exchange Commission (“SEC”) on March ~~12,~~24, 2020. For a complete description of what the Company believes to be the critical accounting policies and estimates used in the preparation of its unaudited condensed consolidated financial statements, refer to the Company’s Annual Report on Form 10-K for the year ended December 31, 2019.

The accompanying unaudited condensed consolidated financial statements have been prepared in conformity with U.S. GAAP, assuming the Company will continue as a going concern.

The Company had net loss of $8.8 million for the three months ended March 31, 2020, and a net loss of $13.3 million for the year ended December 31, 2019. Additionally, the Company incurred significant losses in years prior to 2019. As of March 31, 2020, the Company had an accumulated deficit of $38.0 million and working capital of $113.5 million. As of March 31, 2020, the Company had $26.4 million in cash and cash equivalents, which included $8.7 million in cash balances held by its international subsidiaries, and $39.7 million in aggregate principal debt of which $12.3 million was reflected in current liabilities.

The Company’s ability to meet its obligations as they become due in the ordinary course of business for the next twelve (12) months will depend on its ability to (i) achieve forecasted results of operations, (ii) access funds approved under existing or new credit facilities and/or raise additional capital through sale of the Company’s common stock to the public, and (iii) effectively manage working capital requirements. If the Company cannot raise additional funds when it needs or wants them, its operations and prospects could be negatively affected. Management’s belief that it will achieve forecasted results of operations assumes that, among other things, the Company will continue to be successful in implementing its business strategy. If one or more of these factors do not occur as expected, it could cause the Company to fail to meet its obligations as they come due.

In December 2019, a strain of coronavirus, now known as COVID-19, was reported to have surfaced in Wuhan, China. Since that time, the widespread and sustained transmission of the virus has reached global pandemic status. In response to the pandemic, many national and international health agencies have recommended, and many countries and state, provincial and local governments have implemented, various measures, including travel bans and restrictions, limitations on public and private gatherings, business closures or operating restrictions, social distancing, and shelter-in-place orders. The health effects of the pandemic and the above measures taken in response thereto have had an effect on the global economy in general and has materially impacted and will likely continue to impact the Company’s financial condition, results of operations and cash flows. Given the ongoing and dynamic nature of the virus and the worldwide response related thereto, it is difficult to predict the full impact of the COVID-19 outbreak on our business. Due to the uncertainty around the future economic impact of the pandemic, the fair value measurements used in the Company’s impairment assessments could be negatively impacted and could result in future impairments of goodwill, intangibles and other long-lived assets. During the quarter ended March 31, 2020, the Company’s revenues declined relative to its prior expectations, in part due to the COVID-19 pandemic. The impact of a continued COVID-19 outbreak or sustained measures taken to limit or contain the outbreak could continue to have a material adverse effect on our business, financial condition, results of operations, and cash flows.

Based on the Company's current plans and current business conditions, as of the date of this Quarterly Report on Form 10-Q, the Company believes that its existing cash, cash equivalents and available credit facilities will be sufficient to satisfy its anticipated cash requirements for at least the next twelve months from the date of this Quarterly Report on Form 10-Q.

The preparation of the condensed consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenue and expenses during the reporting period. Actual results could differ materially from those estimates.

For the three and nine months ended September 30, 2018, certain previously reported statement of comprehensive income (loss) and statement of cash flows amounts have been adjusted for certain immaterial reclassifications to correctly reflect: (i) cost of products and services to related parties; and (ii) changes in accounts receivable and contract assets.

The following summarizes required disclosures about geographical concentrations (in thousands):

The Company records contract assets when it has a right to consideration and records accounts receivable when it has an ~~“unconditional”~~unconditional right to consideration. Contract liabilities consist of cash payments received (or unconditional rights to receive cash) in advance of fulfilling performance obligations.

The opening and closing balances of contract assets and contract liabilities related to contracts with customers are as follows:

The decrease in contract liabilities during the three months ended March 31, 2020 was primarily due to the revenue recognition criteria being met for previously deferred revenue, partially offset by invoiced amounts that did not yet meet the revenue recognition criteria. The amount of revenue recognized in the three months ended ~~September 30, 2019~~March 31, 2020 that was included in the prior period contract liability balance was $1.7 million. ~~The amount of revenue recognized in the nine months ended September 30, 2019 that was included in the January 1, 2019 contract liability balance was $7.3 million.~~ This revenue consists of services provided to customers who had ~~prepaid for those services~~been invoiced prior to the current year.

The decrease in contract assets during the three months ended March 31, 2020 was primarily due to billed products and services during the period.

Financial instruments, which potentially subject the Company to concentrations of credit risk, consist primarily of cash, ~~and~~ cash equivalents and restricted cash which totaled ~~$47.9~~$35.9 million at ~~September 30, 2019,~~March 31, 2020, including ~~$7.4~~$12.9 million held by its international subsidiaries. Cash and cash equivalents consist of financial deposits and money market accounts that are principally held with various domestic and international financial institutions with high credit standing.

The Company’s customers include competitive and incumbent local exchange carriers, competitive access providers, internet service providers, wireless carriers and resellers serving these markets. The Company performs ongoing credit evaluations of its customers and generally does not require collateral. Allowances are maintained for potential doubtful accounts.

For the three months ended ~~September 30, 2019, one~~March 31, 2020, two customer accounted for ~~11%~~14% and 10% of net ~~revenue.~~revenue, respectively. For the ~~nine~~three months ended ~~September 30,~~March 31, 2019, no ~~single~~ customer accounted for 10% ~~or more of net revenue. For the three and nine months ended September 30, 2018, one customer accounted for 11%~~ of net revenue.

As of ~~September 30,~~March 31, 2020, two customers each represented 19% of net accounts receivable. As of December 31, 2019, two customers represented ~~17%~~18% and ~~12%~~11% of net accounts receivable, ~~respectively. As of December 31, 2018, two customers represented 11% and 10%~~respectively, of net accounts ~~receivable, respectively.~~receivable.

As of ~~September 30, 2019~~March 31, 2020 and December 31, ~~2018,~~2019, receivables from customers in countries other than the United States represented ~~94%~~96% and ~~88%~~94%, respectively, of net accounts receivable.

The Company allocates the fair value of purchase consideration to the tangible and identifiable intangible assets acquired and liabilities assumed based on their estimated fair values. The excess of the fair value of purchase consideration over the fair values of these identifiable assets and liabilities is recorded as goodwill. When determining the fair values of assets acquired and liabilities assumed, management makes significant estimates and assumptions, especially with respect to intangible assets and certain tangible assets such as inventory.

Critical estimates in valuing certain tangible and intangible assets include but are not limited to future expected cash flows from the underlying assets and discount rates. Management’s estimates of fair value are based upon assumptions believed to be reasonable, but which are inherently uncertain and unpredictable and, as a result, actual results may differ from estimates.

The Company provides certain defined benefit pension plans to employees in ~~Germany.~~Germany and Japan. Pension accounting is intended to reflect the recognition of future benefit costs over the employees' average expected future service to the Company based on the terms of the plans and investment and funding decisions. To estimate the impact of these future payments and the Company’s decisions concerning funding of these obligations, the Company is required to make assumptions using actuarial concepts within the framework of U.S. GAAP. ~~Two~~The critical ~~assumptions are~~assumption is the discount ~~rate and the expected long-term return on plan assets.~~rate. Other important assumptions include expected future salary increases, expected future increases to benefit payments, expected retirement dates, employee turnover, retiree mortality rates and portfolio composition. The Company evaluates these assumptions at least ~~annually.~~annually, or more frequently when certain qualifying events occur.

~~In February 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2016-02,~~ ~~Leases~~ as modified subsequently by ASUs 2018-01, 2018-10, 2018-11, 2018-20 and 2019-01 (“ASC 842”), which introduces the recognition of lease assets and lease liabilities by lessees for those leases classified as operating leases under previous guidance. ASC 842 requires that lease arrangements longer than 12 months’ result in an entity recognizing an asset and liability, with respect to such lease arrangement, among other changes.

The Company adopted the new standard on January 1, 2019, the first day of fiscal 2019, using the modified retrospective approach whereby the cumulative effect of adoption was recognized on the adoption date and prior periods were not restated. ~~There was no net cumulative effect adjustment to retained earnings as of January 1, 2019 as a result of this adoption.~~ ~~ASC 842 sets out the principles for the recognition, measurement, presentation and disclosure of leases.~~

~~The Company has elected to use a certain package of practical expedients permitted under the transition guidance within ASC 842. Those practical expedients are as follows:~~

The Company applies significant judgment in considering all relevant factors that create an economic benefit (e.g., contract-based, asset-based, entity-based, and market-based, among others) as of the commencement date in determining the initial lease term and future lease payments. For example, the Company exercises judgment in determining whether renewal periods will be exercised during the initial measurement process. If the Company believes it will exercise the renewal option, and the lease payments associated with the renewal periods are known or calculable, such renewal lease payments would be included in the initial measurement of the lease liability. Otherwise, even if the Company believes that it will exercise the renewal period, if the renewal payments are unknown or not calculable, they would not be included until they become known or calculable at which time the Company would remeasure the remaining lease payments similar to a lease modification.

Adoption of ASC 842 resulted in the balance sheet recognition of right of use assets and lease liabilities of approximately $22.5 million as of January 1, 2019. Adoption of ASC 842 did not materially impact the Company’s unaudited condensed consolidated statements of comprehensive income (loss) and cash flows. See Note 14 in the notes to unaudited condensed consolidated financial statements.

~~In February 2018, the FASB issued ASU 2018-02,~~ ~~Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income~~. The amendments in this update allow a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the Tax Cuts and Jobs Act (the “Tax Act”). The adoption of this standard on January 1, 2019 did not have a material impact on the Company’s condensed consolidated financial statements, since the Company did not elect to reclassify the income tax effects of the Tax Act from accumulated other comprehensive income to retained earnings.

~~Improving the Presentation of Net Periodic Pension Cost and Net Periodic Post-Retirement Benefit Cost~~

~~In March 2017, the FASB issued ASU 2017-07,~~ ~~Improving the Presentation of Net Periodic Pension Cost and Net Periodic Post-Retirement Benefit Cost~~. The ASU requires the Company to disaggregate the service cost component from the other components of net periodic benefit costs and requires the Company to present the other components of net periodic benefit cost in other income, net. The standard is effective for annual and interim periods beginning after December 31, 2017, and retrospective application is required. The Company adopted this guidance during the first quarter of 2019 without any retrospective adjustments since the underlying pension obligations were acquired through the Keymile Acquisition in 2019. The interest cost, which is the only component of net periodic post-retirement cost, is recognized in Other income (loss), net in the condensed consolidated statement of comprehensive income (loss).

~~In August 2018, the FASB issued ASU 2018-15,~~ ~~Intangibles - Goodwill and Other Internal-Use Software - Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement~~. The update reduces complexity for the accounting for costs of implementing a cloud computing service arrangement and aligns the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software. The standard is effective for annual and interim periods beginning after December 15, 2019, and retrospective or prospective application is permitted. We are currently evaluating the impact of adoption of this ASU, but it is not expected to have a material effect on our condensed consolidated financial statements.

In June 2016, FASB issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments, which requires the Company to measure and recognize expected credit losses for financial assets held and not accounted for at fair value through net income. In November 2018, April 2019 and May 2019, the FASB issued ASU No. 2018-19, Codification Improvements to Topic 326, Financial Instruments - Credit Losses, ASU No. 2019-04, Codification Improvements to Topic 326, Financial Instruments - Credit Losses, and ASU No. 2019-05, Financial Instruments - Credit Losses (Topic 326): Targeted Transition Relief, which provided additional implementation guidance on the previously issued ASU. The updated guidance is effective for the Company on January 1, ~~2020,~~2022, and requires a modified retrospective adoption method. Early adoption is permitted. The Company is currently assessing the potential impact of adopting this new guidance on its ~~consolidated financial statements.~~

~~In January 2017, FASB issued ASU 2017-04,~~ ~~Simplifying the Test for Goodwill Impairment~~, which simplifies the accounting for goodwill impairment. The updated guidance is effective for the Company on January 1, 2020, and will be adopted accordingly. Early adoption is permitted. The Company is currently assessing the potential impact of adopting this new guidance on its consolidated financial statements.

~~On August 28, 2018, the FASB issued ASU 2018-13,~~ ~~Fair Value Measurement~~ (Topic 820), which removes, modifies, and adds certain disclosure requirements related to fair value measurements in ASC 820. The updated guidance is effective for annual and interim periods beginning after December 15, 2019. Early adoption is permitted. The Company is currently assessing the potential impact of adopting this new guidance on itscondensed consolidated financial statements.

In August 2018, the FASB issued ASU 2018-14, Disclosure Framework-Changes to the Disclosure Requirements for Defined Benefit Plans, which amends ASC 715 to add, remove, and clarify disclosure requirements related to defined benefit pension and other postretirement plans. The updated guidance is effective for the Company on January 1, 2021, with early adoption permitted. The Company is currently assessing the potential impact of adopting this new guidance on its condensed consolidated financial statements.

On January 3, 2019, ZTI Merger Subsidiary III Inc., a Delaware corporation and a wholly owned subsidiary of the Company (“ZTI”), acquired all of the outstanding shares of Keymile GmbH (“Keymile”), a limited liability company organized under the laws of Germany, from Riverside KM Beteiligung GmbH (“Riverside”), a limited liability company organized under the laws of Germany, pursuant to a share purchase agreement (the “Keymile Acquisition”).

~~The allocation~~ for a final adjusted acquisition price of the purchase price was based upon a preliminary valuation, and the Company’s estimates and assumptions are subject to refinement, within the measurement period (up to one year from the Acquisition Date)$9.3 million. Measurement period adjustments, with the corresponding adjustment to the bargain purchase gain or goodwill, will be recorded in the reporting period in which the adjustment to the provisional amounts are determined based upon the final valuation.

The aggregate cash purchase price paid for all of the shares of Keymile and certain of its subsidiaries, was €10,250,000 (approximately $11.8 million), subject to adjustment for the lockbox mechanism described below. The Company also assumed pension obligations of approximately $12.7 million, net of pension assets of $3.5 million. Following the closing of the ~~Keymile Acquisition,~~acquisition, Keymile became ~~the Company’s~~a wholly owned ~~subsidiary.~~ ~~The Keymile Acquisition~~ ~~agreement~~ also provided for a lockbox mechanism such that normal operations were observed by Keymile management and any excess cash flows generated from operating activities for the period from October 1, 2018 to December 31, 2018 remained with Keymile following the closing, with the Company as the beneficiary, as the purchaser of Keymile. At December 31, 2018, cash received from the lockbox mechanism amounted to $2.5 million.

On October 1, 2018, as a condition for the Keymile Acquisition, Riverside extended a €4.0 million ($4.4 million, which represents the cash and cash equivalents and short-term debt, in the “Allocation of Purchase Consideration” table below) working capital loan to Keymile. The working capital loan bears interest at a rate of 3.5% per annum and is scheduled for repayment in two equal installments in April and November 2019. The first payment of €2.0 million ($2.2 million) was made in April 2019 and the balance is due in November 2019. As of September 30, 2019, the outstanding balance under this working capital loan was €2.0 million ($2.2 million). Subsequently in November 2019, the Company fully repaid all the outstanding borrowings under this working capital loan.

Keymile is a leading solution provider and manufacturer of telecommunication systems for broadband access. The Company believes Keymile strengthens its portfolio of broadband access solutions, which now includes a series of multi-service access platforms for FTTx network architectures, including ultra-fast broadband copper access based on VDSL/Vectoring and G. Fast technology.

~~A summary~~subsidiary of the ~~preliminary estimated purchase price allocation to the fair value of assets acquired and liabilities assumed is as follows (in thousands):~~

~~The following summarizes the preliminary estimated fair values of the assets acquired and liabilities assumed at the date of acquisition for the Keymile Acquisition (in thousands):~~

Company. The purchase price allocation resulted in the recognition of ~~a gain on bargain purchase~~goodwill of approximately ~~$0.3~~$1.0 million which was included in the unaudited condensed consolidated statements of comprehensive income (loss) for the nine months ended September 30, 2019. The gain on bargain purchase was the result of the preliminary fair value of the identifiable net assets acquired exceeding the purchase price paid for the Keymile Acquisition which was reduced by the lockbox mechanism.

~~The estimated weighted average useful lives of the acquired property, plant~~ and ~~equipment is 5 years. Depreciation is calculated using the straight-line method.~~

~~The following table represents the preliminary estimated fair value and useful lives of identifiable intangible assets acquired:~~

As of the valuation date, there was value attributable to Keymile’s existing customer relationships. Keymile’s key customer base is made up of independent telecommunication service providers and network operators, a base of customers that have seen growth since 2012. Keymile is seen as a market leader and historically has had low customer attrition. In addition, switching costs are considered to be high due to the disruption of switching platforms as well as the additional training necessary. The Company valued the customer relationships using the Income Approach, specifically the Multi-Period Excess Earnings Method (“MPEEM”).

The Company utilized the Relief from Royalty Method (“RFRM”) to value the tradename and developed technology. The RFRM assumes that the value of the asset equals the amount a third party would pay to use the asset and capitalize on the related benefits of the asset. Therefore, a revenue stream for the asset is estimated, and then an appropriate royalty rate is applied to the forecasted revenue to estimate the pre-tax income associated with the asset. The pre-tax income is then tax-effected to estimate the after-tax net income associated with the asset. Finally, the after tax net income is discounted to the present value using an appropriate rate of return that considers both the risk of the asset and the associated cash flow estimates.

The unaudited pro forma information for the periods set forth below gives effect to the Keymile Acquisition as if it had occurred as of January 1, 2018. The unaudited pro forma financial information has been prepared by management for illustrative purposes only and does not purport to represent what the results of operations ~~financial condition or other financial information~~ of Keymile are consolidated with the Company ~~would have been if~~subsequent to the Keymile Acquisition had occurred on January 1, 2018 or what such results or financial condition will be for any future periods. The unaudited pro forma financial information is based on estimates and assumptions and ondate of acquisition. During the ~~information available at the time~~fourth quarter of the preparation thereof. These estimates and assumptions may change, be revised or prove to be materially different, and the estimates and assumptions may not be representative of facts existing at the time of the Keymile Acquisition. The pro forma adjustments primarily relate to acquisition related costs, amortization of acquired intangibles and interest expense related to financing arrangements. Below is the pro forma financial information (in thousands):

~~On July 31,~~ 2019, the Company ~~acquired~~recognized an impairment charge for the ~~remaining 30.94% non-controlling interest of DZS Japan, Inc. (“DZS Japan”), and DZS Japan became a wholly owned subsidiary~~full amount of the Company. The Company acquired the remaining interest in DZS Japan for total cash consideration of $950,000, consisting entirely of payments to the former shareholder (Handysoft). This transaction resulted in a decrease to “Additional paid-in capital” of $127,000, a decrease to “Non- controlling interest” of $823,000, and a total impact of $950,000goodwill recognized in the ~~unaudited condensed consolidated balance sheet as of September 30, 2019.~~

The Company utilizes a fair value hierarchy that is intended to increase consistency and comparability in fair value measurements and related disclosures. The fair value hierarchy is based on inputs to valuation techniques that are used to measure fair value that are either observable or unobservable. Observable inputs reflect assumptions market participants would use in pricing an asset or liability based on market data obtained from independent sources while unobservable inputs reflect a reporting entity’s pricing based upon their own market assumptions. The fair value hierarchy consists of the following three levels:

The following financial instruments are not measured at fair value on the Company’s condensed consolidated balance sheet as of ~~September 30, 2019~~March 31, 2020 and ~~the consolidated balance sheet as of~~ December 31, ~~2018,~~2019, but require disclosure of their fair values: cash and cash equivalents, restricted cash, accounts and other receivables, accounts payable, accrued liabilities, lease liabilities and debt. The carrying values of financial instruments such as cash and cash equivalents, restricted cash, accounts and other receivables, accounts payable and accrued liabilities approximate their fair values based on their short-term nature. The carrying value of the Company's lease liabilities and debt approximates their fair values based on the current rates available to the Company for debt of similar terms and maturities.

As of ~~September 30, 2019~~March 31, 2020 and December 31, ~~2018,~~2019, the Company's cash and cash equivalents consisted of financial ~~deposits and money market accounts that are principally held with various domestic and international financial institutions with high credit standing.~~deposits. Restricted cash consisted primarily of cash restricted for performance bonds, warranty bonds and collateral for ~~borrowings.~~borrowings, and Long term restricted cash is included in other assets. Long term restricted cash was $0.2 million as of March 31, 2020 and December 31, 2019, respectively.

Balance sheet detail as of ~~the following~~March 31, 2020 and December 31, 2019 is as follows (in thousands):

Inventories provided as collateral for borrowings from Export-Import Bank of Korea amounted to ~~$6.5~~$6.4 million and ~~$9.5~~$6.7 million as of ~~September 30, 2019~~March 31, 2020 and December 31, ~~2018,~~2019, respectively.

Depreciation expense associated with property, plant and equipment for the three ~~and nine~~ months ended ~~September 30,~~March 31, 2020 and 2019 was $0.5 million ~~and $1.5 million, respectively. Depreciation expense~~ for ~~the three and nine months ended September 30, 2018 was $0.4 million and $1.2 million,~~each period, respectively.

The Company receives grants from various government entities mainly to support capital expenditures. Such grants are deferred and are generally refundable to the extent the Company does not utilize the funds for qualifying expenditures. Once earned, the Company records the grants as a contra amount to the assets and amortizes such amount over the useful lives of the related assets as a reduction to depreciation expense.

As of March 31, 2020 and December 31, 2019, the net carrying value of goodwill is all attributable to the Company’s US reporting unit. As of March 31, 2020, the Company performed a goodwill impairment assessment for the US reporting unit, due to operating losses incurred by the US reporting unit during the first quarter of 2020 amid the worldwide effects of the COVID-19 pandemic. The fair value of the US reporting unit was estimated using an equal weighting of the guideline company and discounted cash flow methods. During the quarter ended March 31, 2020, the Company also refined its estimated cost allocations between the US reporting unit and the Korea and German reporting units to more appropriately estimate the projected cash flows expected to be generated from each of the Company’s reporting units used in the valuation models. The refinements in cost allocations had no impact on the Company’s segment conclusions and would not have impacted the 2019 annual goodwill impairment conclusions.

During the quarter ended March 31, 2020, the Company also refined its estimated cost allocations between the US reporting unit and the Korea and German reporting units to more appropriately estimate the projected cash flows expected to be generated from each of the Company’s reporting units used in the valuation models. The refinements in cost allocations had no impact on the Company’s segment conclusions and would not have impacted the 2019 annual goodwill impairment conclusions.

The Company did not recognize any impairment ~~loss on~~of goodwill during the ~~nine~~three months ended ~~September 30, 2019~~March 31, 2020 or ~~2018.~~2019.

Intangible assets as of September 30, 2019 include the customer relationships, trade name and developed technology acquired through the Keymile Acquisition (see Note 2) as well as previously acquired intangible assets.

Amortization expense associated with intangible assets for each of the three ~~and nine~~ months ended ~~September 30,~~March 31, 2020 and 2019 was ~~$0.9~~$0.8 million ~~and $2.6 million, respectively.~~ ~~Amortization expense for the three and nine months ended September 30, 2018 was $0.3 million and $0.9 million, respectively.~~

The following table presents the future amortization expense of the Company’s intangible assets as of ~~September 30, 2019~~March 31, 2020 (in thousands):

~~PNC Bank Facility~~The future principal maturities of our Term Loans for each of the next five years are as follows (in thousands):

On February 27, 2019, the Company and ZTI (collectively, the “Borrowers”), and certain direct and indirect subsidiaries of the Borrowers, as guarantors, entered into a Revolving Credit, Term Loan, Guaranty and Security Agreement (the “Domestic Credit Agreement”) and an Export-Import Revolving Credit, Guaranty and Security Agreement (the “Ex-Im Credit Agreement,” and together with the Domestic Credit Agreement, the “Credit Agreements”), in each case with PNC Bank, National Association (“PNC”) and Citibank, N.A. as lenders, and PNC as agent for the lenders (the “PNC ~~Facility”~~Credit Facilities”), which replaced the Company’s former senior secured credit facilities with Wells Fargo Bank (the “Former WFB Facility”). We refer to such transactions and the agreements referenced above as the “PNC Credit Facilities.”

The PNC Credit ~~Agreements provide~~Facilities provided for a ~~$25.0~~$25 million term loan and a ~~$15.0~~$15 million revolving line of credit (including ~~sub-facilities~~subfacilities for ~~export-import~~Ex-Im transactions, letters of credit and swing loans). with a $10 million incremental increase option. The amount the Company iswas able to borrow on the revolving line of credit at any time iswas based on eligible accounts receivable and other conditions, less certain reserves. Borrowings under the PNC ~~Facility bear~~Credit Facilities bore interest at ~~the Company’s option, at either (i)~~ a ~~base~~floating rate equal to either the ~~highest of the federal funds rate plus 0.50%, PNC’s~~PNC prime rate or ~~the daily LIBOR rate plus 1.00%, or (ii)~~ the LIBOR rate for the applicable ~~interest~~ period, ~~subject to~~plus a ~~floor~~margin that was based on the type of 1.00% (with respect to the term loans only), plus in each case, an applicable margin. The applicable margin for term loans is 5.00% for base rate loans and 6.00% for LIBOR rate loans, and the applicable margin for borrowings under the revolving line of credit is 1.50% for base rate loans and 2.50% for LIBOR rate loans.advance.

The Company used a portion of the funds borrowed from the term loan under the PNC Credit ~~Agreements~~Facilities to (i) repay $5.0 million ~~in principal amount~~ of existing ~~related-party~~related party indebtedness with ~~DNI~~Dasan Networks, Inc., the Company’s largest stockholder Dasan Networks, Inc. (“DNI”) plus accrued interest, (ii) repay $1.5 million ~~in outstanding borrowings under the Company’s former~~ revolving line of credit outstanding balance plus accrued interest and fees and cash collateralize $3.6 million in outstanding letters of credit under the Former WFB Facility, and (iii) repay $5.6 million in short-term debt in Korea and Japan. The ~~Company intends to use the remaining funds for ongoing working capital needs. Obligations~~Company’s obligations under the PNC Credit ~~Agreements are~~Facilities were secured by substantially all of the personal property assets of the ~~Borrowers~~Company and ~~the~~its subsidiaries that ~~guarantee~~were co-borrowers or guarantors under the PNC Credit ~~Agreements,~~Facilities, including their intellectual property.

The ~~maturity date under the~~PNC Credit ~~Agreements is~~Facilities had a three-year term and was scheduled to mature on February 27, 2022. The PNC Credit Facilities contemplated repayment of the term loan ~~under the Credit Agreements is repayable~~ in ~~eight~~ quarterly installments ~~of $625,000 beginning June 30, 2019, followed by quarterly installments of $937,500 beginning on June 30, 2021, with all remaining unpaid principal and accrued interest due on~~over the ~~maturity date.~~

The Credit Agreements contain certain covenants, limitations, and conditions with respect to the Borrowers and their subsidiaries, including a maximum leverage ratio, a minimum fixed charge coverage ratio, and a minimum liquidity covenant, as well as financial reporting obligations, and customary events of default. If an event of default occurs, the agent and lenders will be entitled to take various actions, including requiring the immediate repayment of all outstanding amounts under the Credit Agreements, terminating commitments to make additional advances and selling the assetsterm of the ~~Borrowers and their subsidiary guarantors to satisfy the obligations under the Credit Agreements.~~ ~~At September 30, 2019, the Company was not in compliance~~loan, with the ~~maximum leverage ratio financial covenant in the Credit Agreements, which represents an event of default thereunder. On November 8, 2019, the Company obtained a waiver~~balance of the ~~foregoing event of default from the lenders under the Credit Agreements. As a condition for the issuance of the waiver, the Company voluntarily prepaid $10.0 million of the outstanding~~ term loan and ~~paid a one-time fee~~revolving line of ~~$150,000.~~ ~~Uncertainty exists as to the Company’s ability to meet these financial covenants~~credit due at the respective reporting dates during the next twelve months. As a result, the Company is in the process of renegotiating these financial covenants with the banks; however, there is no assurance that the Company will be able to successfully complete such renegotiations. If the Company violates covenants in the Credit Agreements or the contemplated amended covenants, the Company could be required to repay the amounts then outstanding under the Credit Agreements.maturity.

As of ~~September 30,~~December 31, 2019, the Company had ~~$23.8~~$13.1 million in outstanding term loan borrowings under ~~its~~the PNC ~~Facility,~~term loan, and no outstanding borrowings under the revolving line of credit. The interest rate on the term loan was 8.12%at ~~September 30,~~December 31, 2019. ~~Deferred financing costs of $1.5 million has been netted against~~

On March 26, 2020, the ~~aggregate principal amount of~~Company paid the ~~PNC~~outstanding term loan borrowings in the unaudited condensed consolidated balance sheet as of September 30, 2019. On July 2, 2019, $4.4 million in outstanding borrowings under the revolving line of credit (which represented all outstanding borrowings under the revolving line of credit) was repaid in full.

On February 27, 2019, in connection with the entry into the PNC Facility, the Company repaid $1.5 million in principal amount of outstanding borrowings plus accrued interest and fees under the Former WFB Facility and cash collateralized $3.6 million in outstanding letters of credit under the Former WFB Facilityfull and terminated the ~~Former WFB Facility.~~

On October 1, 2018, as a condition for the Keymile Acquisition, Riverside, the former stockholder of Keymile, extended a €4.0 million ($4.4 million) working capital loan to Keymile. The working capital loan bears interest at a rate of 3.5% per annum and is scheduled forPNC Credit Facilities. In association with this debt repayment, in two equal installments. The first payment of €2.0 million ($2.2 million) was made in April 2019 and the balance is due in November 2019. As of September 30, 2019, the outstanding balance under this working capital loan was €2.0 million ($2.2 million). Subsequently in November 2019, the Company ~~fully repaid all~~recorded a loss on extinguishment of debt of $1.4 million during the ~~outstanding borrowings under this working capital loan.~~three months ended March 31, 2020.

Certain of the Company's foreign subsidiaries have entered into various financing arrangements with foreign banks and other lending institutions consisting primarily of revolving lines of credit, trade facilities, term loans and export development loans. These facilities are renewed as they mature and are generally secured by a security interest in certain assets of the applicable foreign subsidiaries and supported by guarantees given by DNI or third parties. Payments under such facilities are made in accordance with the given lender’s amortization schedules.

As of ~~September 30, 2019~~March 31, 2020 and December 31, ~~2018,~~2019, the Company had an aggregate outstanding balance of ~~$20.6~~$12.3 million and ~~$24.8~~$15.8 million, respectively, under such financing arrangements. The maturity dates and interest rates per annum applicable to outstanding borrowings under these financing arrangements are listed in the tables below (amount in thousands).

As of September 30, 2019, the Company had $10.8 million in outstanding borrowings and $9.8 million committed as security for letters of credit under the Company's $20.6 million credit facilities with certain foreign banks.

As of March 31, 2020 and December 31, ~~2018,~~2019, the Company had ~~$5.5~~$1.7 million and $4.6 million in outstanding borrowings, respectively, and ~~$2.6~~$1.2 million and $0.8 million committed as security for letters of credit under the Company's $19.0 million credit ~~facilities~~facility with certain foreign banks.

~~See Note 11 Related-Party Transactions for a discussion of related-party debt.~~

The Company provides certain defined benefit pension plans in Germany for active and former employees of Keymile and their surviving dependents. These benefits were promised upon an employee either reaching retirement age or becoming disabled. Benefits paid depend on an employee’s years of service and annual earnings. These plans were frozen as of September 30, 2003 and have not been offered to new employees after that date. Employees who were already covered by such plans ceased earning benefits under such plans from the freeze date forward. The benefit obligations are determined separately for each plan by estimating the present value of future benefits that employees have earned in prior periods. Given that all plans are frozen; the Company does not have any current service costs to recognize within its defined benefit obligation or pension expense.

The only component of pension expense relates to $0.1 million of interest expense on the defined benefit pension plans, which is recognized in Other income (loss), net in the condensed consolidated statement of comprehensive income (loss). The interest expense is determined by multiplying the defined benefit obligation by the discount rate used to determine the defined benefit obligation. Actuarial gains and losses from changes in assumptions are included in Other comprehensive loss in the condensed consolidated statement of comprehensive income (loss).

~~The following key actuarial assumptions were made in determining the benefit obligation:~~

As of September 30, 2019, the Company’s employee benefit obligations under the defined benefit plans is approximately $13.3 million, net of pension assets of $3.4 million which is under a reinsurance contract policy. During the three and nine months ended September 30, 2019, the Company made no cash contributions to the defined benefit plans.

In February 2016, DNS California borrowed $1.8 million from DNI for capital investment with an interest rate of 4.6% per annum, payable annually. On February 27, 2019, in connection with the ~~Merger, on~~entry into the PNC Credit Facilities, the Company amended the terms of this loan to extend the repayment date to May 27, 2022. As of March 31, 2020, $1.8 million remained outstanding.

In September 9, 2016, ~~the Company~~we entered into a loan agreement with DNI for a $5.0 million unsecured subordinated term loan facility. The term loan was scheduled to mature in September 2021 and was pre-payable at any time by the Company without premium or penalty. The interest rate under this facility was 4.6% per annum. In February 2019, ~~the Company~~we repaid the term loan in full plus accrued interest in connection with the entry into the PNC ~~Facility,~~Credit Facilities, thereby terminating the loan agreement.

In ~~February 2016,~~March 2018, DNS Korea borrowed ~~$1.8~~$5.8 million from DNI of which $4.5 million was repaid on August 8, 2018. The loan bears interest at a rate of 4.6%. On February 27, 2019, in connection with the entry into the PNC Credit Facilities, the w amended the terms of this loan to extend the repayment date to May 27, 2022. As of March 31, 2020, $1.3 million remained outstanding.

In December 2018, we entered into a Loan Agreement with DNI for ~~capital investment~~a $6.0 million term loan with an interest rate of 4.6% per annum. On February 27, 2019, in connection with the entry into the PNC ~~Facility, the Company amended the terms of this loan to extend the repayment date to May 27, 2022. As of September 30, 2019, the $1.8 million balance of the loan remained outstanding.~~

~~On December 27, 2018, the Company entered into a loan agreement with DNI, for a~~ ~~$6.0 million term loan with an interest rate of 4.6% per annum.~~ ~~On February 27, 2019, in connection with the entry into the PNC Facility, the Company~~Credit Facilities, we amended the terms of the term loan to extend the repayment date tountil May 27, 2022 and to terminate any security granted to DNI with respect to such term ~~loan~~.loan. As of ~~September 30, 2019, the~~March 31, 2020, $6.0 million ~~balance of the loan~~ remained outstanding.

In March 2018, Dasan Network Solutions, Inc., a subsidiary of the Company incorporated under the laws of Korea (“DNS Korea”) borrowed KRW6.5 billion ($5.8 million) from DNI, of which KRW5.0 billion ($4.5 million) was repaid on August 8, 2018.~~The loan bears interest at a rate of 4.6%, and is secured by certain accounts receivable of DNS Korea.~~ ~~On February 27, 2019, in connection with the entry into the PNC Facility, the Company amended the terms of this loan to extend the repayment date to May 27, 2022.~~ ~~As of September 30, 2019, KRW 1.5 billion ($1.3 million) remained outstanding.~~

The modifications resulting from the amendments described ~~above~~in the four preceding paragraphs were limited to the extension of the maturity dates and removal of the collateral on the outstanding term loans with DNI. There were no fees paid to DNI or external costs otherwise incurred in connection with these modifications.

On March 5, 2020, DNS Korea, the our wholly-owned, indirect subsidiary entered into a Loan Agreement with DNI (the “March 2020 DNI Loan”). The March 2020 DNI Loan was negotiated and approved on behalf of the Company and its subsidiaries by a special committee of the Board of Directors of the Company (the “Special Committee”) consisting of directors determined to be independent from DNI. The March 2020 DNI Loan consists of a term loan in the amount of KRW 22.4 billion ($18.5 million USD) with interest payable semi-annually at an annual rate of 4.6% and maturing on March 11, 2022. No principal payments are due on the March 2020 DNI Loan until the maturity date, but DNS Korea may prepay the loan, or a portion thereof, without penalty.

As security for the March 2020 DNI Loan (and other existing loans between DNI and DNS Korea and/or DNS California), (i) DNS California, a wholly-owned, direct subsidiary of the Company and the sole stockholder of DNS Korea, agreed to pledge the outstanding shares of DNS Korea to DNI and (ii) DNS Korea granted a security interest in its personal property assets, accounts receivable and intellectual property assets to DNI. The March 2020 DNI Loan includes certain covenants consisting of financial reporting obligations, a maintenance covenant whereby DNS Korea agreed to maintain a minimum stockholders’ equity value in an amount equal to or greater than KRW 43.3 billion ($35.8 million USD), and customary events of default. If an event of default occurs and is not remedied within the applicable cure period, DNI will be entitled to take various actions, including requiring the immediate repayment of all outstanding amounts under the March 2020 DNI Loan and selling the shares or assets of DNS Korea.

DNS Korea loaned the funds borrowed under the March 2020 DNI Loan to the Company, and the Company utilized a portion of such funds to repay in full and terminate the PNC Credit Facilities.

As of March 31, 2020, we had had borrowings of $27.3 million in outstanding from DN. The outstanding balance at March 31, 2020 consisted of the March 2020 DNI Loan of KRW 22.4 billion ($18.5 million USD), a $6.0 million unsecured subordinated term loan facility which matures in March 2022, a $1.8 million loan for capital investment which matures in May 2022, and KRW 1.5 billion ($1.3 million) outstanding under a secured loan from DNS Korea which matures in May 2022. All four loans bear interest at a rate of 4.6% per annum.

Interest expense on these ~~related-party~~related party borrowings was $0.2 million and $0.1 million for the three ~~and nine~~ months ended March 31, 2020 and 2019, respectively.

The Company sponsors defined benefit plans for its employees in Keymile. Defined benefit plans provide pension benefits based on compensation and years of service. These plans were frozen as of September 30, 2003 and have not been offered to new employees after that date. The Company has recorded the underfunded status as of March 31, 2020 and December 31, 2019, ~~was $0.1~~respectively, as a long-term liability on the unaudited condensed consolidated balance sheets. The accumulated benefit obligation for the plans were $15.8 and $17.7 million as of March 31, 2020 and December 31, 2019, respectively.

During the three months ended March 31, 2020, the Company performed a voluntary interim measurement of the plan obligations, due to a significant increase in the discount rate since the last annual measurement date on December 31, 2019, and recorded an actuarial gain on pension plan of $1.5 million, as reflected on the unaudited condensed consolidated statement of comprehensive loss.

The Company holds life insurance contracts, with the Company as beneficiary, in the amount of $3.3 million as of March 31, 2020, related to individuals under the pension plans. These insurance contracts are classified as other assets on the Company’s consolidate consolidated balance sheet. The Company intends to use any proceeds from these policies to fund the pension plans. However, since the Company is the beneficiary on these policies, these assets have not been designated pension plan assets.

The weighted average assumptions used in determining the benefit obligation related to the plans are as follows:

On July 31, 2019, the Company acquired the remaining 30.94% non-controlling interest of DZS Japan.

As of March 31, 2020 and December 31, 2019, the Company had $27.3 million and ~~$0.3~~$9.1 million, ~~respectively. Interest expense~~respectively, outstanding from related party borrowings from DNI. See Note 7 Debt for further information about the ~~three and nine months ended September 30, 2018 was $0.1 million and $0.3 million, respectively.~~ Company’s related party debt.

Sales, cost of revenue, ~~purchases~~manufacturing (included in ~~manufacturing (cost~~cost of revenue)), research and product development, selling, marketing, general and administrative, interest expense and other expenses to and from related parties were as follows (in thousands) for the three ~~and nine~~ months ended ~~September 30, 2019~~March 31, 2020 and ~~September 30, 2018:~~March 31, 2019:

Three Months Ended September 30, 2019

Counterparty

DNI
ownership
interest

Sales

Cost of
revenue

Manufacturing
(cost of
revenue)

Research
and product
development

Selling,
marketing,
general and
administrative

Interest
expense

Other
expenses

DNI

N/A

$
232

$
190

$
—

$
—

$
966

$
104

$
84

Tomato Soft Ltd.

100%

—

—

29

—

—

—

—

Tomato Soft (Xi'an) Ltd.

100%

—

—

—

137

—

—

—

Chasan Networks Co., Ltd.

100%

—

—

279

16

—

—

—

$
232

$
190

$
308

$
153

$
966

$
104

$
84

Three Months Ended September 30, 2018

Counterparty

DNI
ownership
interest

Sales

Cost of
revenue

Manufacturing
(cost of
revenue)

Research
and product
development

Selling,
marketing,
general and
administrative

Interest
expense

Other
expenses

DNI

N/A

$
1,472

$
1,270

$
—

$
—

$
784

$
112

$
89

Tomato Soft Ltd.

100%

—

—

27

—

—

—

—

Tomato Soft (Xi'an) Ltd.

100%

—

—

—

119

—

—

—

Chasan Networks Co., Ltd.

100%

—

—

260

21

—

—

—

HANDYSOFT, Inc.

17.63%

215

208

—

—

2

—

—

$
1,687

$
1,478

$
287

$
140

$
786

$
112

$
89

		Nine Months Ended September 30, 2019															Three Months Ended March 31, 2019
Counterparty	DNI ownership interest	Sales		Cost of revenue		Manufacturing (cost of revenue)		Research and product development		Selling, marketing, general and administrative		Interest expense		Other expenses		DNI ownership interest	Sales		Cost of revenue		Manufacturing (cost of revenue)*		Research and product development		Selling, marketing, general and administrative		Interest expense		Other expenses
DNI	N/A	$	1,828	$	1,346	$	—	$	—	$	2,984	$	349	$	255	N/A	$	722	$	535	$	—	$	—	$	998	$	141	$	89
Tomato Soft Ltd.	100%		—		—		88		—		—		—		—	100%		—		—		30		—		—		—		—
Tomato Soft (Xi'an) Ltd.	100%		—		—		—		392		—		—		—	100%		—		—		—		121		—		—		—
Chasan Networks Co., Ltd.	100%		—		—		837		55		—		—		—
CHASAN Networks Co., Ltd																100%		—		—		278		21		—		—		161
HANDYSOFT, Inc.																18%		91		23		—		—		2		—		—
J-Mobile Corporation	90.47%		42		81		—		—		—		—		—	90%		42		81		—		—		—		—		—
		$	1,870	$	1,427	$	925	$	447	$	2,984	$	349	$	255		$	855	$	639	$	308	$	142	$	1,000	$	141	$	250

		Nine Months Ended September 30, 2018
Counterparty	DNI ownership interest	Sales		Cost of revenue		Manufacturing (cost of revenue)		Research and product development		Selling, marketing, general and administrative		Interest expense		Other expenses
DNI	N/A	$	3,683	$	3,143	$	—	$	—	$	2,950	$	338	$	234
Tomato Soft Ltd.	100%		—		—		84		—		—		—		—
Tomato Soft (Xi'an) Ltd.	100%		—		—		10		396		—		—		—
Chasan Networks Co., Ltd.	100%		—		—		880		57		—		—		—
Dasan France	100%		202		177		—		—		—		—		—
HANDYSOFT, Inc.	17.63%		473		357		—		—		4		—		—
		$	4,358	$	3,677	$	974	$	453	$	2,954	$	338	$	234

The Company has entered into sales agreements with DNI and certain of its subsidiaries. Sales and cost of revenue to DNI, DASAN France, DASAN INDIA Private Limited, and ~~Dasan France, a wholly-owned subsidiary of DNI,~~D-Mobile, represent finished goods produced by the Company that are sold to these related parties who sell the Company's products in Korea, France, India and ~~France,~~Taiwan, respectively.

The Company has entered into an agreement with ~~Chasan~~CHASAN Networks Co., Ltd. to provide manufacturing and research and development services for the Company. Under the agreement with ~~Chasan~~CHASAN Networks., Ltd., the Company is charged a cost plus 7% fee for the manufacturing and development of certain deliverables.

The Company has entered into an agreement with Tomato Soft ~~Ltd.,~~Ltd, a wholly owned subsidiary of DNI, to provide ~~sourcing~~manufacturing and ~~inspection~~research and development services for the Company. ~~Under the agreement with Tomato Soft Ltd., the Company is charged a cost plus 7% fee for sourcing and inspection services.~~

The Company has entered into an agreement with Tomato Soft (Xi'an) Ltd.~~, a wholly owned subsidiary of DNI,~~ to provide research and development services for the Company. Under the agreement with Tomato Soft (Xi'an) Ltd., the Company is charged an expected annual fee of ~~$0.8~~$0.7 million for the development of certain deliverables.

On September 9, 2016, DZS acquired DNS California, through the merger of a wholly owned subsidiary of Zhone Technologies, Inc. with and into DNS California, with DNS California surviving as our wholly owned subsidiary (the “Merger”). Prior to the Merger, as DNS California was then a wholly owned subsidiary of DNI, DNI had sales agreements with certain customers on ~~DNS'~~DNS California's behalf. Since the Merger, due to these prior sales agreements, the Company has entered into an agreement with DNI ~~pursuant to~~in which DNI acts as a sales channel to these customers. Sales to DNI necessary for DNI to fulfill agreements with its customers are recorded net of royalty fees in ~~related-party~~related party revenue.

The Company shares office ~~and certain administrative functions~~space with DNI and certain of DNI's subsidiaries. Prior to the Merger, DNS California, then a wholly owned subsidiary of DNI, shared human resources, treasury and other administrative support with DNI. ~~The~~As such, the Company entered into certain service sharing agreements with DNI and certain of its subsidiaries for ~~continued use of~~ the shared office space and shared administrative services. Expenses related to rent and administrative services are allocated to the Company based on square footage occupied and headcount, respectively.

Other expenses to related parties represent expenses to DNI for its payment guarantees relating to the Company's borrowings. ~~See Note 15 for more information regarding such guarantees.~~ The Company pays DNI a guarantee fee which is calculated as 0.9% of the guaranteed amount. Refer to Note 14 Commitments and Contingencies for more details about obligations guaranteed by DNI.

Balances of receivables and payables arising from sales and purchases of goods and ~~services~~serviced with related parties as of March 31, 2020 and December 31, 2019 were included in the following balance sheet captions on the unaudited consolidated balance sheet, as follows (in thousands) ~~as of September 30, 2019 and December 31, 2018:~~:

As of December 31, 2018

Counterparty

DNI
ownership
interest

Account
receivables

Other
receivables

Deposits
for lease*

Loan
Payable

Accounts
payable

Other
payables

Accrued
and other
liabilities**

DNI

N/A

$
—

$
—

$
735

$
14,142

$
1,000

$
1,231

$
169

Tomato Soft Ltd.

100%

—

—

—

—

—

9

—

Tomato Soft (Xi'an)
Ltd.

100%

—

—

—

—

—

41

—

Dasan France

100%

280

65

—

—

—

—

—

HANDYSOFT, Inc.

14.77%

303

—

—

—

654

—

—

Chasan Networks Co.,
Ltd.

100%

—

—

—

—

89

—

—

$
583

$
65

$
735

$
14,142

$
1,743

$
1,281

$
169

		As of December 31, 2019
Counterparty	DNI ownership interest	Account receivables		Other receivables		Deposits for lease*		Loan Payable		Accounts payable		Other payables		Accrued and other liabilities
DNI	N/A	$	—	$	32	$	709	$	9,096	$	—	$	1,475	$	119
Tomato Soft Ltd.	100%		—		—		—		—		—		10		—
Tomato Soft (Xi'an), Ltd	100%		—		—		—		—		—		45		—
Chasan Networks Co., Ltd.	100%		—		—		—		—		96		—		—
		$	—	$	32	$	709	$	9,096	$	96	$	1,530	$	119

The related party receivables and payables balances are reflected in the respective balance sheet captions noted in the table headers above, other than:

On May 20, 2019, the Company completed a public offering of 4,717,949 shares of its common stock, inclusive of 615,384 shares sold upon full exercise of the underwriters’ option to purchase additional shares of common stock, at a price to the public of $9.75 per share. All shares of common stock were sold by the Company. The total gross proceeds from the offering, before deducting underwriting discounts, commissions and offering expenses, were approximately $46.0 million. After deducting the underwriters’ discount, commissions and other offering expenses, the net proceeds were approximately $42.5 million.

Basic net income per share attributable to DASAN Zhone Solutions, Inc. is computed by dividing the net income attributable to DASAN Zhone Solutions, Inc. for the period by the weighted average number of shares of common stock outstanding during the period. The calculation of diluted net income per share attributable to DASAN Zhone Solutions, Inc. gives effect to common stock equivalents; however, potential common stock equivalents are excluded if their effect is antidilutive. Potential common stock equivalents are composed of incremental shares of common stock issuable upon the exercise of stock options and the vesting of restricted stock units. In periods when a net loss is reported, all common stock equivalents are excluded from the calculation because they would have an anti-dilutive effect, meaning the loss per share would be reduced. Therefore, in periods when a loss is reported, basic and dilutive loss per share are the same.

The following table is a reconciliation of the numerator and denominator in the basic and diluted net ~~income (loss)~~loss per share calculation (in thousands, except per share data) for the three ~~and nine~~ months ended ~~September 30, 2019~~March 31, 2020 and ~~September 30, 2018:~~March 31, 2019:

The Company leases certain properties and buildings (including manufacturing facilities, warehouses, and office spaces) and equipment under various arrangements which provide the right to use the underlying asset and require lease payments for the lease term. The Company’s lease portfolio consists of operating leases which expire at various dates through 2027. ~~At September 30, 2019, the Company had one outstanding finance lease.~~

The Company determines if an arrangement contains a lease at inception. The Company evaluates each service contract upon inception to determine whether it is, or contains, a lease. Such determination is made by applying judgment in evaluating each service contract within the context of the 5-step decision making process under ASC 842. The key concepts of the 5-step decision making process that the Company evaluated can be summarized as: (1) is there an identified physical asset; (2) does the Company have the right to substantially all the economic benefits from the asset throughout the contract period; (3) does the Company control how and for what purpose the asset is used; (4) does the Company operate the asset; and (5) did the Company design the asset in a way that predetermines how it will be used.

Assets and liabilities related to operating leases are included in the condensed consolidated balance sheet as right-of-use assets from operating leases, operating lease liabilities - current and operating lease liabilities - non-current.

Operating lease right-of-use assets and liabilities are recognized at commencement date based on the present value of lease payments over the lease term. Many of the Company’s lease agreements contain renewal options; however, the Company does not recognize right-of-use assets or lease liabilities for renewal periods unless it is determined that the Company is reasonably certain of renewing the lease at inception or when a triggering event occurs. Some of the Company’s lease agreements contain rent escalation clauses, rent holidays, capital improvement funding or other lease concessions.

The Company recognizes minimum rental expense on a straight-line basis based on the fixed components of a lease arrangement. The Company amortizes this expense over the term of the lease beginning with the date of initial possession, which is the date lessor makes an underlying asset available for use. Variable lease components represent amounts that are not fixed in nature, are not tied to an index or rate, and are recognized as incurred.

In determining its right-of-use assets and lease liabilities, the Company applies a discount rate to the minimum lease payments within each lease agreement. ASC 842 requires the Company to use the rate of interest that a lessee would have to pay to borrow on a collateralized basis over a similar term an amount equal to the lease payments in a similar economic environment. The Company determines the incremental borrowing rate for each lease based primarily on its lease term and the economic environment of the applicable country or region. When the Company cannot readily determine the discount rate implicit in the lease agreement, the Company utilizes an incremental borrowing rate based on the most recent debt facilities interest rates and applicable to the local geography and with similar term to lease.

~~For the measurement and classification of its lease agreements, the Company groups lease and non-lease components into a single lease component for all underlying asset classes.~~ ~~Variable lease payments include payments for non-lease components of maintenance costs.~~ The components of lease expense were as follows for the three ~~and nine~~ months ended ~~September 30, 2019:~~March 31, 2020 and 2019, respectively (in thousands):

Supplemental cash flow information related to the Company’s operating leases was as follows for the three ~~and nine~~ months ended ~~September 30, 2019:~~March 31, 2020 and 2019, respectively (in thousands):

The following table presents the ~~lease balances within the Company’s condensed consolidated balance sheet,~~ weighted average remaining lease term and weighted average discount rates related to the Company’s operating leases as of ~~September 30,~~March 31, 2020 and December 31, 2019, ~~(in thousands):~~respectively:

The following table presents the maturity of the Company’s operating lease liabilities as of ~~September 30, 2019~~March 31, 2020 (in thousands):

As of December 31, 2018, the estimated future lease payments under non-cancelable operating leases as defined under the previous lease accounting guidance of ASC Topic 840, for the following five fiscal years and thereafter are as follows (in thousands):

On ~~August 29, 2019,~~March 2, 2020, the Company ~~cancelled~~announced its plans to relocate its corporate headquarters from Oakland, California to Plano, Texas and establish a ~~warehouse lease~~new U.S.-based Engineering Center of Excellence in ~~Germany and recorded $0.2 million of lease cancellation expense to cover early termination costs and renovation obligations. The Company recognized the non-recurring lease cancellation expense~~Plano. On February 24, 2020, in ~~Selling, marketing, general and administrative in the condensed consolidated statement of comprehensive income (loss). In~~ connection with the ~~lease cancellation, balance sheet recognition~~planned relocation of the Company headquarters to Plano, the Company entered into two separate sublease agreements for office and laboratory space in Plano, TX. The commencement date of these leases is expected to occur in the second quarter of 2020. On the commencement date of these leases, the Company will recognize an aggregate of approximately ~~$0.6~~$1.2 million in right-of-use assets and operating lease liabilities ~~are removed from the condensed consolidated balance sheets as of September 30, 2019.~~

~~On July 9, 2019, the Company entered into a lease agreement (the “Lease”)~~in connection with Family Stations, Inc., a California corporation (“Lessor”). The Lease covers approximately 16,500 square feet of space located at 1350 South Loop Road, Alameda, California (the “Premises”). The Lease provides for a term of 63 months, commencing on November 1, 2019, with a basic monthly rent ranging from $41,273 to $47,846 per month. The Company recognized approximately $2.1 million right-of-use assets and operating lease liabilities as of the commencement date of November 1, 2019.these leases.

The Company accrues warranty costs based on historical trends for the expected material and labor costs to provide warranty services. Warranty periods are generally one to five years from the date of shipment. The following table reconciles changes in the Company’s accrued warranties and related costs included in accrued and other liabilities (in thousands) for the ~~nine~~three months ended ~~September 30, 2019~~March 31, 2020 and ~~September 30, 2018:~~March 31, 2019:

In the normal course of operations, from time to time, the Company arranges for the issuance of various types of surety bonds, such as bid and performance bonds, which are agreements under which the surety company guarantees that the Company will perform in accordance with contractual or legal obligations. As of ~~September 30, 2019,~~March 31, 2020, the Company had ~~$13.8~~$7.3 million of surety bonds guaranteed by third parties.

~~The Company has agreements with various contract manufacturers which include non-cancellable inventory purchase commitments.~~ The Company’s inventory purchase commitments typically allow for cancellation of orders 30 days in advance of the required inventory availability date as set by the Company at time of order. However, the Company has agreements with various contract manufacturers which include non-cancellable inventory purchase commitments. The amount of non-cancellable purchase commitments outstanding, net of reserve, was ~~$3.2~~$5.6 million as of ~~September 30, 2019.~~March 31, 2020.

The Company has certain royalty commitments associated with the shipment and licensing of certain products. Royalty expense is generally based on a dollar amount per unit shipped or a percentage of the underlying revenue and is recorded in cost of revenue.

The following table sets forth payment guarantees of the Company's indebtedness and other obligations as of ~~September 30, 2019 (in thousands)~~March 31, 2020 that have been provided by third parties and DNI. DNI owns approximately ~~44.4%~~44.1% of the outstanding shares of the Company's common ~~stock:~~stock. The amount guaranteed exceeds the principal amounts of outstanding obligations due to collateral requirements by the banks.

~~Legal Proceedings~~*The Company is generally responsible for warranty liabilities for a period of two years with respect to major product sales and has, therefore, contracted for surety insurance for a portion of the warranty liabilities.

From time to time, the Company is subject to various legal proceedings, claims and litigation arising in the ordinary course of business. While the outcome of these matters is currently not determinable, the Company records an accrual for legal contingencies that it has determined to be probable to the extent that the amount of the loss can be reasonably estimated. The Company does not expect that the ultimate costs to resolve these matters will have a material adverse effect on its consolidated financial position, results of operations or cash flows. However, litigation is subject to inherent uncertainties, and unfavorable rulings could occur. If an unfavorable ruling were to occur, there exists the possibility of a material adverse impact on the results of operations and cash flows of the reporting period in which the ruling occurs, or future periods.

Income tax expense (benefit) for the three ~~and nine~~ months ended ~~September 30,~~March 31, 2020 and 2019 was approximately ~~$0.3~~$0.0 million and ~~$1.1~~$0.1 million respectively, on pre-tax loss of ~~$3.7~~$8.8 million and ~~$2.0 million, respectively. Income tax expense for the three and nine months ended September 30, 2018 was $0.7 million and $1.1 million, respectively, on pre-tax income of $2.6 million and $4.4~~$1.4 million, respectively.

~~For~~As of March 31, 2020, the ~~three and nine months ended September 30, 2019 and 2018, the effective~~ income tax rate varied from the United States statutory income tax rate primarily due to valuation allowances in the United States and ~~the mix of earnings~~taxable income generated by some of the Company’s ~~wholly owned~~wholly-owned foreign subsidiaries.

The total amount of unrecognized tax benefits, including interest and penalties, at ~~September 30, 2019~~March 31, 2020 was ~~$0.8 million. The amount of tax benefits that would impact the effective income tax rate, if recognized, is $0.1~~$1.0 million. There were no significant changes to unrecognized tax benefits during the ~~three and nine months~~quarter ended ~~September 30, 2019 and 2018.~~March 31, 2020. The Company does not anticipate any significant changes with respect to unrecognized tax benefits within the next 12 months.

On March 27, 2020, the “Coronavirus Aid, Relief and Economic Security (CARES) Act” was signed into law. The Act includes provisions relating to refundable payroll tax credits, deferment of the employer portion of certain payroll taxes, net operating loss carryback periods, alternative minimum tax credit refunds, modifications to the net interest deduction limitations and technical corrections to tax depreciation methods for qualified improvement property. The Company is currently analyzing the impact of these changes and therefore an estimate of the impact to income taxes is not yet available.

The Company is a global provider of ultra-broadband network access solutions and communications platforms deployed by advanced Tier 1, 2 and 3 service providers and enterprise customers. There are no segment managers who are held accountable for operations, operating results and plans for levels or components below the Company unit level. Accordingly, the Company is considered to be in a single reporting segment and operating unit structure. The Company’s chief operating decision maker is the Company’s Chief Executive Officer, who reviews financial information presented on a consolidated basis accompanied with disaggregated revenues by geographic region for purposes of making operating decisions and assessing financial performance.

The Company attributes revenue from customers to individual countries based on location shipped. Refer to Note 1(e) Revenue disaggregation information, for the required disclosures about geographical concentrations and revenue by products and services and geography.

The Company's property, plant and equipment, net of accumulated depreciation, were located in the following geographical areas (in thousands) as of ~~September 30, 2019~~March 31, 2020 and December 31, ~~2018:~~2019:

On November 8, 2019, the Company received a waiver from the Lenders under the Credit Agreements with respect to the Company’s violation at September 30, 2019 of the maximum leverage ratio financial covenant set forth in the Credit Agreements. As a condition for the issuance of the waiver, the Company voluntarily prepaid $10.0 million of the outstanding term loan and paid a one-time fee of $150,000.

As used in this Quarterly Report on Form 10-Q, unless the context suggests otherwise, the terms “DZS,” “we,” “our” and “us” refer to DASAN Zhone Solutions, Inc. and its subsidiaries.

This Quarterly Report on Form 10-Q, including “Management’s Discussion and Analysis of Financial Condition and Results of Operations,” contains forward-looking statements regarding future events and our future results that are subject to the safe harbors created under the Securities Act of 1933 (the “Securities Act”) and the Securities Exchange Act of 1934 (the “Exchange Act”). These statements are based on current expectations, estimates, forecasts, and projections about the industries in which we operate, and reflect the beliefs and assumptions of our management as of the date hereof.

We use words such as “anticipate,” “believe,” “continue,” “could,” “estimate,” “expect,” “forecast,” “goal,” “intend,” “may,” “plan,” “project,” “seek,” “should,” “target,” “will,” “would,” variations of such words, and similar expressions to identify forward-looking statements. In addition, statements that refer to projections of earnings, revenue, costs ~~margins~~ or other financial items in future periods; anticipated growth and trends in our business, industry or key markets; cost synergies, growth opportunities and other potential financial and operating benefits of ~~our acquisitions, including our~~the Merger and the acquisition of ~~Keymile GmbH (the “Keymile Acquisition”);~~Keymile; future growth and revenues from our products; our plans and our ability to refinance or repay our existing indebtedness prior to the applicable maturity dates; our ability to access other capital to fund our future operations; future economic conditions and performance; the impact of the global outbreak of COVID-19; the impact of interest rate and foreign currency fluctuations; the anticipated relocation of our corporate headquarters to Texas; anticipated performance of products or services; competition; plans, objectives and strategies for future ~~operations; market~~operations, including our pursuit or strategic acquisitions and ~~foreign currency exchange rate risks associated with financial instruments; the impact of interest rate changes; anticipated obligations under~~ our ~~non-U.S. defined benefit pension plans; future obligations under contracts~~continued investment in research and ~~leases and~~development; other characterizations of future events or ~~circumstances,~~circumstances; and all other statements that are not statements of historical fact, are forward-looking statements within the meaning of the Securities Act and the Exchange Act. ~~Readers are cautioned~~Although we believe that ~~these~~the assumptions underlying the forward-looking statements are ~~only predictions~~reasonable, we can give no assurance that our expectations will be attained. Factors which could have a material adverse effect on our operations and are subject to risks, uncertainties and assumptions that are difficult to predict, including those identified under the heading “Risk Factors” in Part II, Item 1A of this Quarterly Report on Form 10-Q and Part I, Item 1A of our Annual Report on Form 10-K filed with the SEC on March 12, 2019 and in our other filings with the Securities and Exchange Commission (the SEC). Ourfuture prospects or which could cause actual results ~~may~~to differ materially ~~and adversely~~ from ~~those expressed in any forward-looking statements. Factors that might cause such a difference~~our expectations include, but are not limited ~~to,~~to:

We are a global provider of ultra-broadband network access solutions and communications platforms deployed by advanced Tier 1, 2 and 3 service providers and enterprise customers. We ~~provide~~operate in a ~~wide array of reliable, cost-effective networking technologies to a diverse customer base that includes more than 900 customers in more than 80 countries worldwide.~~single reporting segment. We research, develop, test, sell, manufacture and support ~~platforms~~communications equipment in five major areas: broadband access, ~~mobile backhaul,~~ Ethernet switching, ~~with Software Defined Networking (“SDN”) capabilities, new enterprise solutions based on~~mobile fronthaul/backhaul, Passive Optical LAN ~~(“POL”),~~ and ~~new generation~~SDN/NFV solutions:

As of ~~September 30, 2019,~~March 31, 2020, we employed over 830 personnel ~~worldwide, of which approximately half are engineers or engaged~~worldwide. We consider the relationships with our employees to be positive. Competition for technical personnel in ~~research~~our industry is intense. We believe that our future success depends in part on our continued ability to hire, assimilate and ~~development.~~ retain qualified personnel. To date, we believe that we have been successful in recruiting qualified employees, but there is no assurance that we will continue to be successful in the future.

On ~~July 9, 2019,~~March 2, 2020, the Company announced its plans to relocate its corporate headquarters from California to Plano, Texas and establish a new U.S.-based Engineering Center of Excellence in Plano. In connection with the planned relocation, the Company entered into ~~a lease agreement (the “Lease”)~~sublease agreements with ~~Family Stations,~~Huawei Technologies, Inc.~~, a California corporation (“Lessor”). The Lease covers~~ and Futurewei Technologies, Inc. to sublease an aggregate of approximately ~~16,500~~16,300 square feet ~~of space~~ located at 1350 South Loop Road, Alameda, California (the “Premises”). The Lease provides for a term of 63 months, commencing on November 1, 2019 (or such later date as contemplated by the Lease in the event Lessor is unable to tender possession of the Premises by such date), with a basic monthly rent ranging from $41,273 to $47,846 per month.Legacy Place, 5700 Tennyson Parkway, Plano, Texas.

On ~~July 31, 2019,~~March 5, 2020, DNS Korea entered into a Loan Agreement with DNI, pursuant to which DNS Korea borrowed KRW 22.4 billion ($18.5 million USD) from DNI. DNS Korea subsequently loaned all of such borrowed funds to the Company, ~~acquired~~a portion of which were used to repay and terminate the remaining 30.94% non-controlling interest of DZS Japan, Inc. (“DZS Japan”), and DZS Japan became a wholly owned subsidiary of the Company. The Company acquired the remaining interest in DZS Japan for total cash consideration of $950,000, consisting entirely of payments to the former shareholder (Handysoft).

On August 26, 2019, Michael Golomb, our Chief Financial Officer, resigned from such position. We have initiated a search for his replacement and Mr. Golomb has agreed to consult with us to provide advice regarding the transition of responsibilities. While the Company is pursuing a permanent replacement for Mr. Golomb, Il Yung Kim, the Company’s President and Chief Executive Officer will serve as interim Chief Financial Officer.

~~On November 8, 2019, the Company received a waiver from the lenders under the~~PNC Credit Agreements with respect to the Company’s violation at September 30, 2019 of the maximum leverage ratio financial covenant of the Credit Agreements. As a condition for the issuance of the waiver, the Company voluntarily prepaid $10.0 million of the outstanding term loan and paid a one-time fee of $150,000. Facilities.

We list in the table below the historical condensed consolidated statement of comprehensive ~~income (loss)~~loss as a percentage of total net revenue for the periods indicated.

	Three Months Ended						Nine Months Ended
	September 30,						September 30,						Three Months Ended March 31,
	2019			2018			2019			2018			2020			2019
Net revenue:
Third parties		100	%		98	%		99	%		98	%		100	%		99	%
Related parties		0	%		2	%		1	%		2	%		—			1	%
Total net revenue		100	%		100	%		100	%		100	%		100	%		100	%
Cost of revenue:
Products and services - third parties		68	%		65	%		66	%		65	%		65	%		65	%
Products and services - related parties		0	%		2	%		1	%		2	%		—			1	%
Amortization of intangible assets		1	%		0	%		1	%		0	%		1	%		—
Total cost of revenue		69	%		67	%		68	%		67	%		66	%		66	%
Gross profit		31	%		33	%		32	%		33	%		34	%		34	%
Operating expenses:
Research and product development		14	%		12	%		13	%		13	%		20	%		14	%
Selling, marketing, general and administrative		22	%		16	%		20	%		17	%		29	%		20	%
Amortization of intangible assets		1	%		0	%		1	%		0	%		1	%		1	%
Total operating expenses		37	%		28	%		34	%		30	%		50	%		35	%
Operating income (loss)		(6	)%		5	%		(2	)%		3	%
Operating loss														(16	)%		(1	)%
Interest income		1	%		0	%		0	%		0	%		—			—
Interest expense		(2	)%		0	%		(1	)%		0	%		(1	)%		(1	)%
Loss on extinguishment of debt														(3	)%		—
Other income (loss), net		1	%		(1	)%		1	%		0	%		2	%		—
Income (loss) before income taxes		(6	)%		4	%		(2	)%		3	%
Loss before income taxes														(18	)%		(2	)%
Income tax provision		—			1	%		(1	)%		1	%		—			—
Net income (loss)		(6	)%		3	%		(1	)%		2	%
Net income (loss) attributable to non-controlling interest		0	%		0	%		0	%		0	%
Net income (loss) attributable to DASAN Zhone Solutions, Inc.		(6	)%		3	%		(1	)%		2	%
Net loss														(18	)%		(2	)%
Net income attributable to non-controlling interest														—			—
Net loss attributable to DASAN Zhone Solutions, Inc.														(18	)%		(2	)%

Net Revenue for the three months ended September 30, 2019 of $71.5 million was slightly lower as compared to $71.9 million for the same period last year. We believe, the slight decrease in net revenue during the period was primarily attributed to softer spending from wireline carriers. For the nine months ended September 30, 2019, net revenue increased

The following table presents our revenues by 10% or $21.6 million to $229.3 million from $207.7 million for the same period last year. The increase in net revenue during the period was partly due to the impact of the Keymile Acquisition and increased product and services sales primarily in the Europe, Middle East and Africa (“EMEA”), and Korea regions.

~~Information about our net revenue for products and services is summarized below~~source (in millions):

For the three months ended ~~September 30, 2019,~~March 31, 2020, product revenue decreased by 3%42% or ~~$2.4~~$28.9 million to ~~$66.4~~$40.7 million from ~~$68.8~~$69.6 million in the same period last year. For the three months ended March 31, 2020, service revenue increased by 51% or $2.3 million to $6.8 million from $4.5 million in the same period last year. The decrease in product revenue during the period was primarily ~~attributed~~attributable to softer spending from wireline carriers coupled with delayed purchases from one of our major customers in Japan. For the nine months ended September 30, 2019, product revenue increased by 8% or $16.1 million to $214.9 million from $198.8 million in the same period last year. The increase in product revenue during the period was primarily due to an increase in product sales, resultingimpacts from the ~~impact of the Keymile Acquisition,~~worldwide COVID-19 pandemic, which resulted in disruptions to our supply chain, as well as decreased business operations by certain of our ~~broadened geographical base and product offerings, particularly in the EMEA, and Korea regions.~~

Service revenue represents revenue from maintenance and other services associated with product shipments. For the three months ended September 30, 2019, service revenue increased by 65% or $2.0 million to $5.1 million from $3.1 million in the same period last year. For the nine months ended September 30, 2019, service revenue increased by 62% or $5.5 million to $14.4 million from $8.9 million in the same period last year. customers. The increase in service revenue was ~~due~~primarily related to ~~the Keymile Acquisition and an increase in the~~a greater number of products under contract for maintenance and extended warranty.

Information about our net revenue for North America and international markets is summarized below (in millions):

	Three Months Ended September 30,										Nine Months Ended September 30,										Three Months Ended March 31,
	2019		2018		Increase/ (decrease)			% change			2019		2018		Increase/ (decrease)			% change			2020		2019		Increase/ (decrease)			% change
Revenue by geography:
United States	$	9.7	$	11.2	$	(1.5	)		(13	)%	$	29.0	$	41.4	$	(12.4	)		(30	)%	$	7.6	$	9.6	$	(2.0	)		(21	)%
Canada		1.1		1.1		—			0	%		3.0		3.3		(0.3	)		(9	)%		0.8		0.9		(0.1	)		(11	)%
Total North America		10.8		12.3		(1.5	)		(12	)%		32.0		44.7		(12.7	)		(28	)%		8.4		10.5		(2.1	)		(20	)%
Latin America		6.3		6.8		(0.5	)		(7	)%		18.8		21.7		(2.9	)		(13	)%		2.2		6.6		(4.4	)		(67	)%
Europe, Middle East, Africa		15.8		10.4		5.4			52	%		59.4		27.3		32.1			118	%		12.4		18.4		(6.0	)		(33	)%
Korea		20.9		19.6		1.3			7	%		55.7		50.9		4.8			9	%		9.6		15.9		(6.3	)		(40	)%
Other Asia Pacific		17.7		22.8		(5.1	)		(22	)%		63.4		63.1		0.3			0	%		14.9		22.7		(7.8	)		(34	)%
Total International		60.7		59.6		1.1			2	%		197.3		163.0		34.3			21	%		39.1		63.6		(24.5	)		(39	)%
Total	$	71.5	$	71.9	$	(0.4	)		(1	)%	$	229.3	$	207.7	$	21.6			10	%	$	47.5	$	74.1	$	(26.6	)		(36	)%

From a geographical perspective, the decrease in net revenue for the three months ended ~~September 30, 2019~~March 31, 2020 was attributable to declining revenue in ~~North America~~all regions except for Korea, and ~~Other Asia Pacific regions, partially offset~~was largely attributed to impacts from the worldwide COVID-19 pandemic, resulting in disruptions to our supply chain and decreased business operations by increased revenues in the EMEA region due to the Keymile Acquisition. The increase in net revenue for the nine months ended September 30, 2019 was primarily attributable to increased revenues in the EMEA region due to the impactcertain of ~~the Keymile Acquisition, as well as increased revenues in Korea, partially offset by the decline in revenue in North America and Latin America due to changes in the buying patterns of certain~~our customers.

Across ~~international~~non-U.S. markets, net revenue for the three months ended ~~September 30, 2019 increased 2%~~March 31, 2020 decreased 39% or ~~$1.1~~$24.5 million to ~~$60.7~~$39.1 million from ~~$59.6~~$63.6 million ~~for~~from the same period last year, and represented ~~85%~~82% of total net revenue compared with ~~83%~~86% during the same period of ~~2018.~~2019. The ~~increase~~decrease in international net revenue was primarily ~~related~~attributed to impacts from the Keymile Acquisition. International net revenue for the nine months ended September 30, 2019 increased 21% or $34.3 million to $197.3 million from $163.0 million for the same period last year, and represented 86% of total net revenue compared with 78% during the same period of 2018. The increase in international net revenue was partly related to the Keymile Acquisition and increased product sales in the EMEA, and Korea regions during the period.worldwide COVID-19 pandemic.

For the three months ended ~~September 30, 2019, one~~March 31, 2020 two customer accounted for ~~11%~~14% and 10% of net ~~revenue.~~revenue, respectively. For the ~~nine~~three months ended ~~September 30,~~March 31, 2019, no ~~single~~ customer accounted for more 10% ~~or more~~ of net revenue. ~~For the three and nine months ended September 30, 2018, one customer accounted for 11% of net revenue. However, we~~

We anticipate that our results of operations in any given period may depend to a large extent on sales to a small number of large ~~accounts.~~customers. As a result, our revenue for any quarter may be subject to significant volatility based upon changes in orders from one or a small number of key customers.

Total cost of revenue ~~increased 2%~~decreased 36% or ~~$0.8~~$17.7 million to ~~$49.3~~$31.5 million for the three months ended ~~September 30, 2019,~~March 31, 2020, compared to ~~$48.5~~$49.2 million for the three months ended ~~September 30, 2018.~~March 31, 2019. Total cost of revenue was ~~69%~~66% of net revenue for each of the three months ended September 30, 2019, compared to 67% for the three months ended September 30, 2018. Total cost of revenue increased 11% or $15.1 million to $154.4 million for the nine months ended September 30, 2019, compared to $139.3 million for the nine months ended September 30, 2018. Total cost of revenue was 68% of net revenue for the nine months ended September 30, 2019, compared to 67% for the nine months ended September 30, 2018. Gross profit percentage remained substantially flat at 33% for the nine months ended September 30, 2019March 31, 2020 and 2018. Gross profit percentage for the three months ended September 30, 2019 was slightly lower at 31% as compared to 33% for the three months ended September 30, 2018, mainly due to product mix and foreign currency exchange rate fluctuations.March 31, 2019.

We expect that in the future our cost of revenue as a percentage of net revenue will vary depending on the mix and average selling prices of products sold. In addition, continued competitive and economic pressures could cause us to reduce our prices, adjust the carrying values of our inventory, or record inventory expenses relating to discontinued products and excess or obsolete inventory.

Research and product development expenses ~~increased 14%~~decreased 6% or ~~$1.2~~$0.6 million to ~~$9.9~~$9.6 million for the three months ended ~~September 30, 2019~~March 31, 2020, compared to ~~$8.7~~$10.2 million for the three months ended ~~September 30, 2018.~~March 31, 2019. As a percentage of sales, research and product development expenses were 20% for the three months ended March 31, 2020, compared to 14% for the three months ended September 30, 2019, compared to 12% for the three months ended September 30, 2018. Research and product development expenses increased 12% or $3.2 million to $29.5 million for the nine months ended September 30, 2019 compared to $26.3 million for the nine months ended September 30, 2018. As a percentage of sales, research and product development expenses were 13% for the nine months ended September 30, 2019 and 2018. The increase in research and product development expenses was primarily due to the Keymile Acquisition. March 31, 2019.

We intend to continue to invest in research and product development to attain our strategic product development objectives, while seeking to manage the associated costs through expense controls. ~~We have grown our research and development capabilities, particularly in software development, by using lower cost centers like Vietnam.~~

Selling, marketing, general and administrative expenses ~~increased 42%~~include personnel costs for sales, marketing, administration, finance, information technology, human resources and general management as well as legal and accounting expenses, rent, utilities, trade show expenses and related travel costs.

Selling, marketing, general and administrative expenses decreased 9% or ~~$4.6~~$1.4 million to ~~$15.7~~$13.6 million for the three months ended ~~September 30, 2019,~~March 31, 2020, compared to ~~$11.1~~$15.0 million for the three months ended ~~September 30, 2018.~~March 31, 2019. The decrease in selling, marketing, general and administrative costs in the three months ended March 31, 2020 relative to the same period in 2019 is largely due to restructuring activities, including reductions in force, undertaken during 2019. As a percentage of sales, selling, marketing, general and administrative expenses were ~~22%~~29% for the three months ended ~~September 30, 2019,~~March 31, 2020, compared to ~~16%~~20% for the three months ended September 30, 2018. Selling, marketing, general and administrative expenses increased 30% or $10.5 million to $45.7 million for the nine months ended September 30, 2019, compared to $35.2 million for the nine months ended September 30, 2018. As a percentage of sales, selling, marketing, general and administrative expenses were 20% for the nine months ended September 30, 2019, compared to 17% for the nine months ended September 30, 2018.March 31, 2019. The increase in selling, marketing, general and administrative ~~expenses was primarily~~costs as a percentage of sales in the period relative to the first quarter of 2019 is due to the ~~impact~~lower overall level of revenues in the ~~Keymile Acquisition and growth in business as we continue to expand our presence internationally.~~three months ended March 31, 2020.

Income tax ~~expense~~benefit for the three ~~and nine~~ months ended ~~September 30, 2019~~March 31, 2020 was ~~$0.3 million and $1.1 million, respectively, on pre-tax loss of $3.7 million and $2.0 million, respectively. Income~~approximately $5,000, compared to income tax expense for the three ~~and nine~~ months ended ~~September 30, 2018 was $0.7~~March 31, 2019 of $0.1 million, on pre-tax loss of $8.8 million and ~~$1.1 million, respectively, on pre-tax income of $2.6 million and $4.4~~$1.4 million, respectively. ~~For~~As of March 31, 2020, the ~~three and nine months ended September 30, 2019 and September 30, 2018, the effective~~ income tax rate varied from the United States statutory income tax rate, primarily due to valuation allowances in the United States and ~~the mix of earnings~~taxable income generated by ~~our wholly owned~~some of the Company’s foreign subsidiaries.

In managing our business and assessing our financial performance, we supplement the information provided by our U.S. GAAP results with adjusted earnings before stock-based compensation, interest, taxes, ~~depreciation~~ and ~~amortization and the impact of certain other charges or transactions,~~depreciation, or Adjusted EBITDA, a ~~non-GAAP~~non-U.S. GAAP financial measure. We define Adjusted EBITDA as net income (loss)~~, as defined by GAAP, before~~ plus (i) interest expense, net, (ii) provision (benefit) for ~~income~~ taxes, (iii) depreciation and amortization, ~~expense,~~ (iv) stock-based compensation, ~~expenses,~~ and (v) the impact of material transactions or events that we believe are not indicative of our core operating performance, such as merger and acquisition transaction costs, inventory valuation step-up ~~valuation~~ amortization, purchase price adjustments, restructuring and other charges, goodwill impairment, bargain purchase gain, gain or (loss) on sale of assets, or impairment of ~~fixed~~long-lived assets or loss on debt extinguishment, any of which may or may not be recurring in nature. We believe that the presentation of Adjusted EBITDA enhances the usefulness of our financial information by presenting a measure that management uses internally to monitor and evaluate our operating performance and to evaluate the effectiveness of our business strategies. We believe Adjusted EBITDA also assists investors and analysts in comparing our performance across reporting periods on a consistent basis because it excludes the impact of items that we do not believe reflect our core operating performance.

Adjusted EBITDA has limitations as an analytical tool. Some of these limitations are:

Because of these limitations, Adjusted EBITDA should not be considered in isolation or as a substitute for net income (loss) or any other performance measures calculated in accordance with U.S. GAAP or as a measure of liquidity. Management understands these limitations and compensates for these limitations by relying primarily on our U.S. GAAP results and using Adjusted EBITDA only as a supplemental measure.

Set forth below is a reconciliation of Adjusted EBITDA and net income, which we consider to be the most directly comparable U.S. GAAP financial measure to Adjusted EBITDA (in thousands):

For a complete description of what we believe to be the critical accounting policies and estimates used in the preparation of our unaudited condensed consolidated financial Statements, refer to Note 1, Organization and Summary of Significant Accounting Policies, in the notes to our audited consolidated financial statements in our Annual Report on Form 10-K for the year ended December 31, ~~2018,~~2019, as supplemented by Note 1, Organization and Summary of Significant Accounting Policies, in the notes to our unaudited condensed consolidated financial statements in Part I, Item 1 of this Quarterly Report on Form 10-Q.

Our operations are financed through a combination of our existing cash, cash equivalents, available credit facilities, and sales of equity and debt instruments, based on our operating requirements and market conditions.

The following table summarizes the information regarding our cash and cash equivalents and working capital (in thousands):

The Company had net loss of $8.8 million for the three months ended March 31, 2020 and a net loss of $13.3 million for the year ended December 31, 2019. Additionally, the Company incurred significant losses in years prior to 2019. As of March 31, 2020, the Company had an accumulated deficit of $38.0 million and working capital of $113.6 million. As of March 31, 2020, the Company had $26.4 million in cash and cash equivalents, which included $8.7 million in cash balances held by its international subsidiaries, and $39.7 million in aggregate principal debt of which $12.3 million was reflected in current liabilities.

However, we continue to focus on cost management, operating efficiency and restrictions on discretionary spending. In addition, if necessary, we may sell assets, issue debt or equity securities or purchase credit insurance. We may also reduce the scope of our planned product development, reduce sales and marketing efforts and reduce our operations in low margin regions, including reductions in headcount. In March 2020, as described below under the header March 2020 DNI Loan, we entered into a Loan Agreement with DNI, and used a portion of such funds to repay in full and terminate the Company’s existing credit facility with PNC Bank. Based on our current plans and current business conditions, as of the date of this Quarterly Report on Form 10-Q, we believe that these measures along with our existing cash and cash equivalents will be sufficient to satisfy our anticipated cash requirements for at least the next twelve (12) months from the date of this Quarterly Report on Form 10-Q.

Our ability to meet our obligations as they become due in the ordinary course of business for the next twelve (12) months will depend on our ability (i) to achieve forecasted results of operations, (ii) access funds under new credit facilities and/or raise additional capital through sale of our common stock to the public, and (iii) effectively manage working capital requirements. If we cannot raise additional funds when we need or wants them, our operations and prospects could be negatively affected. While we believe that we are likely to achieve forecasted results of operations if we are successful in implementing our business, the impact of the COVID-19 pandemic provides great uncertainty with respect to our future operations, could result in a material decline in our operating cash flows and could cause us to fail to meet our obligations as they come due.

In December 2019, a strain of coronavirus, now known as COVID-19, was reported to have surfaced in Wuhan, China. Since that time, the widespread and sustained transmission of the virus has reached global pandemic status. In response to the pandemic, many national and international health agencies have recommended, and many countries and state, provincial and local governments have implemented, various measures, including travel bans and restrictions, limitations on public and private gatherings, business closures or operating restrictions, social distancing, and shelter-in-place orders. The health effects of the pandemic and the above measures taken in response thereto have had an effect on the global economy in general and has materially impacted and will likely continue to impact the Company’s financial condition, results of operations and cash flows. Given the ongoing and dynamic nature of the virus and the worldwide response related thereto, it is difficult to predict the full impact of the COVID-19 outbreak on our business. During the quarter ended March 31, 2020, the Company’s revenues declined relative to its prior expectations, in part due to the COVID-19 pandemic. Due to the uncertainty around the future economic impact of the pandemic, the fair value measurements used in the Company’s impairment assessments could be negatively impacted and could result in future impairments of goodwill, intangibles and other long-lived assets. The impact of a continued COVID-19 outbreak or sustained measures taken to limit or contain the outbreak could continue to have a material adverse effect on our business, financial condition, results of operations, and cash flows.

Net cash provided by operating activities increased by $5.6 million to $0.6 million for the three months ended March 31, 2020 from net cash used in operating activities ~~increased by $6.2 million to $21.9~~of $5.0 million for the ~~nine~~three months ended ~~September 30, 2019~~March 31, 2019. The improvement in cash from ~~$15.7 million for the nine months ended September 30, 2018 primarily due to the decrease in earnings between the two periods and the net effect of~~ changes in operating assets and liabilities ~~during the period.~~was primarily due to collection accounts receivables, including amounts reflected in contract assets.

Net cash used in investing activities ~~increased~~decreased by ~~$5.4~~$4.2 million to ~~$6.2~~$0.6 million for the ~~nine~~three months ended ~~September 30, 2019~~March 31, 2020 from ~~$0.8~~$4.8 million for the ~~nine~~three months ended ~~September 30, 2018.~~March 31, 2019. This ~~increase~~decrease was primarily due to the ~~payment~~acquisition of ~~the purchase price of $11.8 million, net of cash received of $7.1 million,~~Keymile in ~~the Keymile Acquisition.~~2019.

~~Net~~Cash provided by financing activities totaled $3.1 million for the three months ended March 31, 2020 and consisted primarily of proceeds from a related party loan, partially offset by a net outflow associated with the repayment of the PNC credit facility. This compared to cash provided by financing activities ~~increased by $31.0~~of $5.1 million ~~to $46.2 million~~ for the ~~nine~~three months ended ~~September 30,~~March 31, 2019 from $15.2 million for the nine months ended September 30, 2018. This increase was primarily due to the public stock offering in May 2019 in which we received $42.5 million in net proceeds and the borrowing proceeds received upon entry into the PNC Facility (defined below), partially offset by repayments of short-term and long-term borrowings..

Our primary source of liquidity comes from our cash, ~~and~~ cash equivalents and restricted cash, which totaled ~~$47.9~~$35.9 million at ~~September 30, 2019, as well as our PNC Bank Facility, under which we had aggregate revolving line availability of $12.0 million as of September 30, 2019.~~March 31, 2020. Our cash and cash equivalents as of ~~September 30, 2019~~March 31, 2020 included ~~$7.4~~$12.9 million in cash balances held by our international subsidiaries.

On February 27, 2019, ~~DZS and ZTI (collectively,~~ the ~~“Borrowers”),~~Company and certain ~~direct and indirect~~of its subsidiaries ~~of the Borrowers, as guarantors,~~(as co-borrowers or guarantors) entered into that certain Revolving Credit, Term Loan, Guaranty and Security Agreement ~~(the “Domestic Credit Agreement”)~~ and that certain Export-Import Revolving Credit, Guaranty and Security Agreement, ~~(the “Ex-Im Credit Agreement,” and together with the Domestic Credit Agreement, the “Credit Agreements”),~~ in each case with PNC Bank, National Association (“~~PNC”~~PNC Bank”) and Citibank, N.A. as lenders, and PNC as agent for the ~~lenders (the~~lenders. We refer to such transactions and the agreements referenced above as the “PNC ~~Facility”), which replaced our former senior secured credit facilities with Wells Fargo Bank (the “Former WFB Facility”)~~Credit Facilities”.

The PNC Credit ~~Agreements provide~~Facilities provided for a ~~$25.0~~$25 million term loan and a ~~$15.0~~$15 million revolving line of credit (including subfacilities for Ex-Im transactions, letters of credit and swing loans). with a $10 million incremental increase option. The amount ~~we are~~the Company was able to borrow on the revolving line of credit at any time iswas based on eligible accounts receivable and other conditions, less certain reserves. Borrowings under the PNC ~~Facility bear~~Credit Facilities bore interest at ~~our option, at either (i)~~ a ~~base~~floating rate equal to either the ~~highest of the federal funds rate plus 0.50%, PNC’s~~PNC prime rate or ~~the daily LIBOR rate plus 1.00%, or (ii)~~ the LIBOR rate for the applicable ~~interest~~ period, ~~subject~~plus a margin that was based on the type of advance.

The PNC Credit Facilities had a three-year term and were scheduled to ~~a floor~~mature on February 27, 2022. The PNC Credit Facilities contemplated repayment of ~~1.00% (with respect to~~ the term ~~loans only), plus~~loan in ~~each case, an applicable margin. The applicable margin for~~quarterly installments over the term ~~loans is 5.00% for base rate loans~~of the loan, with the balance of the term loan and ~~6.00% for LIBOR rate loans, and the applicable margin for borrowings under the~~ revolving line of credit ~~is 1.50% for base rate loans and 2.50% for LIBOR rate loans.~~due at maturity.

The Company used a portion of the ~~funds borrowed from~~proceeds of the ~~term loan~~March 2020 DNI Loan to repay in full and terminate the PNC Credit Facilities. Covenants under the ~~Credit Agreements to (i) repay $5.0 million in principal amount of existing related-party indebtedness with~~March 2020 DNI ~~plus accrued interest, (ii) repay $1.5 million in outstanding borrowings plus accrued interest and fees and cash collateralize $3.6 million in outstanding letters of credit~~Loan are significantly less restrictive than under the ~~Former WFB Facility, and (iii) repay $5.6 million in short-term debt in Korea and Japan. We intend to use the remaining funds for ongoing working capital needs. Obligations under the~~PNC Credit ~~Agreements are secured by substantially all of the personal property assets of the Borrowers and the subsidiaries that guarantee the Credit Agreements, including their intellectual property.~~

The maturity date under the Credit Agreements is February 27, 2022. The term loan under the Credit Agreements is repayable in eight quarterly installments of $625,000 beginning June 30, 2019, followed by quarterly installments of $937,500 beginning on June 30, 2021, with all remaining unpaid principal and accrued interest due on the maturity date.

The Credit Agreements contain certain covenants, limitations, and conditions with respect to the Borrowers and their subsidiaries, including a maximum leverage ratio, a minimum fixed charge coverage ratio, and a minimum liquidity covenant, as well as financial reporting obligations, and customary events of default. If an event of default occurs, the agent and lenders will be entitled to take various actions, including requiring the immediate repayment of all outstanding amounts under the Credit Agreements, terminating commitments to make additional advances and selling the assets of the Borrowers and their subsidiary guarantors to satisfy the obligations under the Credit Agreements. At September 30, 2019, the Company was not in compliance with the maximum leverage ratio financial covenant in the Credit Agreements, which represents an event of default thereunder. On November 8, 2019, the Company obtained a waiver of the foregoing event of default from the lenders under the Credit Agreements. As a condition for the issuance of the waiver, the Company voluntarily prepaid $10.0 million of the outstanding term loan and paid a one-time fee of $150,000. Uncertainty exists as to the Company’s ability to meet these financial covenants at the respective reporting dates during the next twelve months. As a result, the Company is in the process of renegotiating these financial covenants with the banks; however, there is no assurance that the Company will be able to successfully complete such renegotiations. If the Company violates covenants in the Credit Agreements or the contemplated amended covenants, the Company could be required to repay the amounts then outstanding under the Credit Agreements.

As of September 30, 2019, we had $23.8 million in outstanding term loan borrowings and no outstanding revolving line of credit borrowings under the Credit Agreements. On July 2, 2019, $4.4 million in outstanding borrowings under the revolving line of credit (which represented all outstanding borrowings under the revolving line of credit) was paid in full.

As of September 30, 2019, the interest rate on the term loan was 8.12%. Deferred financing cost of $1.5 million as of September 30, 2019 has been netted against the aggregate principal amount of the PNC term loan in the unaudited condensed consolidated balance sheet as of September 30, 2019.

On February 27, 2019, in connection with the entry into the PNC Facility, we repaid $1.5 million in principal amount of outstanding borrowings plus accrued interest and fees under the Former WFB Facility, cash collateralized $3.6 million outstanding letters of credit under the Former WFB Facility and terminated the Former WFB Facility.

On October 1, 2018, as a condition for the Keymile Acquisition, the former stockholder of Keymile extended a €4.0 million ($4.4 million) working capital loan to Keymile. The working capital loan bears interest at a rate of 3.5% per annum and is scheduled for repayment in two equal installments. The first payment of €2 million ($2.2 million) was made in April 2019 and the balance is due in November 2019. As of September 30, 2019, the outstanding balance under this working capital loan was €2.0 million ($2.2 million). Subsequently in November 2019, the Company fully repaid all the outstanding borrowings under this working capital loan.Facilities.

Certain of our foreign subsidiaries have entered into various financing arrangements with foreign banks and other lending institutions consisting primarily of revolving lines of credit, trade facilities, term loans and export development loans. These facilities are renewed ~~as they mature~~on an annual basis and are generally secured by a security interest in certain assets of the applicable foreign subsidiaries and supported by guarantees given by DNI or third parties. Payments under such facilities are made in accordance with the given lender’s amortization schedules. As of ~~September 30, 2019~~March 31, 2020 and December 31, ~~2018,~~2019, we had an aggregate outstanding balance of ~~$20.6~~$12.3 million and ~~$24.8~~$15.8 million, respectively, under such financing arrangements, and the interest rate per annum applicable to outstanding borrowings under these financing arrangements ranged from 0% to ~~5.49%~~3.05% as of ~~September 30, 2019.~~March 31, 2020.

In February 2016, DNS California borrowed $1.8 million from DNI for capital investment with an interest rate of 4.6% per annum. On February 27, 2019, in connection with the ~~Merger, on~~entry into the PNC Credit Facilities, the Company amended the terms of this loan to extend the repayment date to May 27, 2022. As of March 31, 2020, the $1.8 million remained outstanding.

In September, 9, 2016, wethe Company entered into a loan agreement with DNI for a $5.0 million unsecured subordinated term loan facility. The term loan was scheduled to mature in September 2021 and was pre-payable at any time by usthe Company without premium or penalty. The interest rate under this facility was 4.6% per annum. In February 2019, wethe Company repaid the term loan in full plus accrued interest in connection with the entry into the PNC ~~Facility,~~Credit Facilities, thereby terminating the loan agreement.

In ~~February 2016,~~March 2018, DNS Korea borrowed ~~$1.8~~$5.8 million from DNI, ~~for capital investment with an~~of which $4.5 million was repaid on August 8, 2018. The loan bears interest at a rate of 4.6% ~~per annum.~~. On February 27, 2019, in connection with the entry into the PNC ~~Facility,~~Credit Facilities, the ~~parties~~Company amended the terms of this loan to extend the repayment date ~~until~~to May 27, 2022. As of ~~September 30, 2019, the $1.8~~March 31, 2020, $1.3 million ~~balance of the loan~~ remained outstanding.

OnIn December, ~~27,~~ 2018, wethe Company entered into a ~~Loan Agreement~~loan agreement with DNI, for a $6.0 million term loan with an interest rate of 4.6% per annum. On February 27, 2019, in connection with the entry into the PNC ~~Facility,~~Credit Facilities, the ~~parties~~Company amended the terms of the term loan to extend the repayment date ~~until~~to May 27, 2022 and to terminate ~~the~~any security ~~interest~~ granted to DNI with respect to such term loan. As of ~~September 30, 2019,~~March 31, 2020, the $6.0 million ~~balance~~remained outstanding.

The modifications resulting from the amendments described in the four preceding paragraphs were limited to the extension of the ~~loan remained outstanding.~~maturity dates and removal of the collateral on the outstanding term loans with DNI. There were no fees paid to DNI or external costs otherwise incurred in connection with these modifications.

On March ~~27, 2018,~~ ~~Dasan Network Solutions, Inc.~~5, 2020, DNS Korea, the Company’s wholly-owned, indirect subsidiary entered into a Loan Agreement with DNI (the “March 2020 DNI Loan”). The March 2020 DNI Loan was negotiated and approved on behalf of the Company and its subsidiaries by a special committee of the Board of Directors of the Company (the “Special Committee”) consisting of directors determined to be independent from DNI. The March 2020 DNI Loan consists of a term loan in the amount of KRW 22.4 billion ($18.5 million USD) with interest payable semi-annually at an annual rate of 4.6% and maturing on March 11, 2022. No principal payments are due on the March 2020 DNI Loan until the maturity date, but DNS Korea may prepay the loan, or a portion thereof, without penalty.

As security for the March 2020 DNI Loan (and other existing loans between DNI and DNS Korea and/or DNS California), (i) DNS California, a wholly-owned, direct subsidiary of the Company ~~incorporated~~and the sole stockholder of DNS Korea, agreed to pledge the outstanding shares of DNS Korea to DNI and (ii) DNS Korea granted a security interest in its personal property assets, accounts receivable and intellectual property assets to DNI. The March 2020 DNI Loan includes certain covenants consisting of financial reporting obligations, a maintenance covenant whereby DNS Korea agreed to maintain a minimum stockholders’ equity value in an amount equal to or greater than KRW 43.3 billion ($35.8 million), and customary events of default. If an event of default occurs and is not remedied within the applicable cure period, DNI will be entitled to take various actions, including requiring the immediate repayment of all outstanding amounts under the ~~laws~~March 2020 DNI Loan and selling the shares or assets of DNS Korea.

DNS Korea ~~(“DNS Korea”),~~ loaned the funds borrowed ~~KRW6.5 billion ($5.8 million)~~under the March 2020 DNI Loan to the Company, and the Company used a portion of such funds to repay in full and terminate the PNC Credit Facilities, described below.

As of March 31, 2020, the Company had borrowings of $27.3 million outstanding from DNI. The outstanding balance at March 31, 2020 consisted of the March 2020 DNI Loan of KRW 22.4 billion ($18.5 million USD), a $6.0 million unsecured subordinated term loan ~~bears~~facility which matures in May 2022, a $1.8 million loan for capital investment which matures in May 2022, and KRW 1.5 billion ($1.3 million) outstanding under a secured loan to DNS Korea which matures in May 2022. All four loans bear interest at a rate of 4.6% and is secured by certain accounts receivable of DNS Korea. On February 27, 2019, in connection with the entry into the PNC Facility, the parties amended the terms of this loan to extend the repayment date until May 27, 2022. As of September 30, 2019, KRW1.5 billion ($1.3 million) remained outstanding. per annum.

Interest expense on these ~~related-party~~related party borrowings was $0.2 million and $0.1 million ~~for each of~~during the three months ended ~~September 30,~~March 31, 2020 and 2019, ~~and 2018, and $0.3 million for each of the nine months ended September 30, 2019 and 2018.~~respectively.

Our fixed commitments for cash expenditures consist primarily of payments under operating leases, inventory purchase commitments, and payments of principal and interest for debt obligations.

From time to time, we may provide or commit to extend credit or credit support to our customers. This financing may include extending the terms for product payments to customers. Any extension of financing to our customers will limit the capital that we have available for other uses.

Our accounts receivable, while not considered a primary source of liquidity, represent a concentration of credit risk because a significant portion of the accounts receivable balance at any point in time typically consists of a relatively small number of customer account balances. As of ~~September 30, 2019,~~March 31, 2020, two customers each represented ~~17% and 12%~~19% of net accounts receivable, respectively, and receivables from customers in countries other than the United States represented ~~94%~~96% of net accounts receivable. We do not currently have any material commitments for capital expenditures, or any other material commitments aside from operating leases for our facilities, inventory purchase commitments and debt.

At ~~September 30, 2019,~~March 31, 2020, our future contractual commitments by fiscal year were as follows (in thousands):

			Payments due by period														Payments due by period
	Total		2019		2020		2021		2022		2023		Thereafter		Total		2020		2021		2022		2023		2024		Thereafter
Operating lease payments	$	22,788	$	1,259	$	4,197	$	3,890	$	3,609	$	3,460	$	6,373	$	25,436	$	3,890	$	5,090	$	4,691	$	4,273	$	3,842	$	3,650
Other lease payments		406		145		226		35		—		—		—
Short-term debt																12,323		12,323		—		—		—		—		—
Purchase commitments		3,188		3,188		—		—		—		—		—		5,565		5,565		—		—		—		—		—
Foreign debts		22,808		10,769		12,039		—		—		—		—
PNC debts		23,750		10,625		2,500		3,437		7,188		—		—
Long-term debt - related party		9,049		—		—		—		9,049		—		—		27,348		—		—		27,348		—		—		—
Royalty obligations		69		69		—		—		—		—		—
Total future contractual commitments	$	82,058	$	26,055	$	18,962	$	7,362	$	19,846	$	3,460	$	6,373	$	70,672	$	21,778	$	5,090	$	32,039	$	4,273	$	3,842	$	3,650

~~The~~Future minimum operating lease ~~amounts shown~~obligations in the table above represent leases for certain properties and buildings (including manufacturing facilities, warehouses, and office spaces) and equipment under various arrangements which provide the right to use the underlying asset and require leaseinclude primarily payments for ~~the lease term. For additional information regarding how leases are reported on~~ our ~~balance sheet, see~~office locations and manufacturing, research and development locations, which expire at various dates through 2025. See Note 14 in“Leases” of the ~~notes~~Notes to ~~our unaudited condensed consolidated financial statements~~Unaudited Condensed Consolidated Financial Statements included in ~~Part I, Item 1 of~~ this Quarterly Report on Form ~~10-Q.~~10-Q for further discussion regarding our operating leases.

The purchase commitments shown above represent non-cancellable inventory purchase commitments as of ~~September 30, 2019.~~March 31, 2020.

~~Our short-term~~The debt obligations have been recorded as liabilities on our balance sheet, and as of September 30, 2019 are comprised of $20.6 million in outstanding borrowings under the credit facilities of our foreign subsidiaries, $12.5 million in outstanding borrowings under the Credit Agreements and $2.2 million in outstanding borrowings under a working capital loan from the former stockholder of Keymile. Such amounts representobligation amount shown above represents scheduled principal repayments, but not the associated interest payments which may vary based on changes in market interest rates. ~~At September 30, 2019,~~See Note 7 “Debt” of the ~~interest rate per annum applicable~~Notes to outstanding borrowings under the trade facilities of our foreign subsidiaries ranged from 0% to 5.49%, was 8.12% under the PNC term loan, and was 3.5% for the Keymile working capital loan. See above under "Cash Management" for further information about these facilities.

~~As of September 30, 2019, we had an aggregate of $9.1 million~~Unaudited Condensed Consolidated Financial Statements included in outstanding borrowings from DNI, which consisted of a $6.0 million unsecured subordinated term loan facility which matures in May 2022, a $1.8 million loan for capital investment which matures in May 2022, and KRW 1.5 billion ($1.3 million) outstanding under a secured loan from DNS Korea which matures in May 2022. All three loans bear interest at a rate of 4.6% per annum.

~~See “Cash Management” – “Related-Party Debt” above and Note 11 in the notes to our unaudited condensed consolidated financial statements in Part I, Item 1 of~~ this Quarterly Report on Form 10-Q for further ~~information about~~discussion regarding our ~~related-party debt.~~debt agreements.

We are potentially exposed to concentrations of credit risk, through our cash and cash equivalents, which totaled $47.9 million at September 30, 2019, including $7.4 million held by our international subsidiaries and our accounts and other receivables, net, which totaled $108.9 million at September 30, 2019. Cash and cash equivalents consist of financial deposit and money market accounts that are principally held with various domestic and international financial institutions with high credit standing. We perform ongoing credit evaluations of our customers and generally do not require collateral to secure our receivables. Allowances are maintained for potential doubtful accounts.

We anticipate that our results of operations in any given period may depend to a large extent on sales to a small number of large accounts. As a result, our revenue for any quarter may be subject to significant volatility based upon changes in orders from one or a small number of key customers.

For the three months ended September 30, 2019, one customer accounted for 11% of net revenue. For the nine months ended September 30, 2019, no single customer accounted for 10% or more of net revenue. For the three and nine months ended September 30, 2018, one customer accounted for 11% of net revenue.

As of September 30, 2019, two customers represented 17% and 12% of net accounts receivable, respectively. As of December 31, 2018, two customers represented 11% and 10% of net accounts receivable, respectively.

~~As of September 30, 2019 and December 31, 2018, receivables from customers in countries other than the United States represented 94% and 88%, respectively, of net accounts receivable.~~

Our exposure to market risk for changes in interest rates relates primarily to our variable rate outstanding debt. As of September 30, 2019, our outstanding variable-interest debt balance was $44.4 million, which consisted of principal amount of borrowings under the short-term credit facilities of our foreign subsidiaries and term loan borrowings under the Credit Agreements (all of which bear interest at a variable rate). As of September 30, 2019, amounts borrowed under our short-term credit facilities bore interest ranging from 0% to 5.49%, and amounts borrowed under the PNC term loan bore interest at 8.12%. Assuming the outstanding balance on our variable rate debt remains constant over a year, a 1% increase in the interest rate would decrease pre-tax income and cash flow by approximately $0.5 million. In addition, as of September 30, 2019, we had an aggregate of $11.2 million in outstanding borrowings from DNI and Riverside (all of which bear interest at a fixed rate of 4.6% and 3.5%, respectively).

We transact business in various foreign countries, and a significant portion of our assets is located in Korea. We have sales operations throughout Asia, Europe, the Middle East and Latin America. We are exposed to foreign currency exchange rate risk associated with foreign currency denominated assets and liabilities, primarily intercompany receivables and payables. Accordingly, our operating results are exposed to changes in exchange rates between the U.S. dollar and those currencies.

We have performed a sensitivity analysis as of September 30, 2019 using a modeling technique that measures the impact on the balance sheet arising from a hypothetical 10% adverse movement in the levels of foreign currency exchange rates relative to the U.S. dollar, with all other variables held constant. The sensitivity analysis indicated that a hypothetical 10% adverse movement in foreign currency exchange rates would result in a foreign exchange loss of $3.5 million at September 30, 2019. This sensitivity analysis assumes a parallel adverse shift in foreign currency exchange rates, which do not always move in the same direction. Actual results may differ materially.

We are required to maintain disclosure controls and procedures designed to provide reasonable assurance of achieving the objective that information required to be disclosed in our reports filed or submitted pursuant to the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms and that such information is accumulated and communicated to our management, including our principal executive officer and principal financial officer, as appropriate to allow for timely decisions regarding required disclosures. Our disclosure controls and procedures include those components of our internal control over financial reporting intended to provide reasonable assurance that transactions are recorded as necessary to permit preparation of financials in accordance with U.S. GAAP. In designing and evaluating the disclosure controls and procedures, management recognizes that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving the desired control objectives, and management applies its judgment in evaluating the cost-benefit relationship of possible controls and procedures.

As required by Rule 13a-15(b) under the Exchange Act, we conducted an evaluation of the effectiveness of our disclosure controls and procedures as of ~~September 30, 2019,~~March 31, 2020, the end of the period covered by this Quarterly Report on Form 10-Q. The evaluation was done under the supervision and with the participation of management, including our principal executive officer and principal financial officer. In the course of the evaluation of our disclosure controls and procedures, our principal executive officer and principal financial officer concluded that, because of the unresolved material weaknesses in our internal control over financial reporting as described below, our disclosure controls and procedures were not effective as of ~~September 30, 2019.~~March 31, 2020.

In connection with the Company’s annual evaluation of its internal control over financial reporting conducted in accordance with SEC Rule 13a-15(c), the Company’s management, including our Chief Executive Officer and Chief Financial Officer, identified a material weakness in the Company’s internal control over financial reporting, and as a result thereof, determined that the Company’s internal control over financial reporting was not effective as of December 31, ~~2018.~~2019.

A material weakness is a deficiency, or a combination of deficiencies, in internal control over financial reporting such that there is a reasonable possibility that a material misstatement of the registrant’s annual or interim financial statements will not be prevented or detected on a timely basis. Following consummation of the Merger with DNS, management identified material weaknesses in our internal control over financial reporting, which continued to exist at December 31, 2018. Specifically, managementManagement determined that wethe Company did not maintain ~~an effective control environment as there was an insufficient~~a sufficient complement of personnel with appropriate accounting knowledge, experience and ~~competence, resulting~~training in ~~incorrect~~the application of ~~generally accepted~~US GAAP, including accounting ~~principles. Additionally,~~for significant unusual transactions. In addition, the Company ~~has failed to~~did not maintain an effective control environment as it did not appropriately identify internal controls over ~~our financial close process. Further, we~~inventory valuation and revenue. Also, Management determined that the Company did not design and maintain effective controls over the financial closing process, including controls surrounding monitoring and review of ~~supporting information to determine~~ the ~~completeness and accuracy~~activity of the accounting for complex transactions, specifically related to the Merger, which resulted in an incorrect application of generally accepted accounting principles that resulted in material misstatements and a restatement of our unaudited condensed consolidated financial statements for the three and nine months ended September 30, 2016.its foreign subsidiaries.

We continue to evaluate and assess the design and operation of our controls and are taking steps to modify processes related to the accounting for significant and unusual transactions as well as enhancing monitoring and oversight controls in the application of accounting guidance related to such transactions. In connection therewith, we have hired and we anticipate that we will hire additional accounting personnel with relevant skills, training and experience, and conduct further training of our accounting and finance personnel.

Except as described above, there were no changes in our internal control over financial reporting that occurred during our last fiscal quarter that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting. ~~Integration activities related to the Keymile Acquisition may lead us to modify certain internal controls in future periods.~~

We are subject to various legal proceedings, claims and litigation arising in the ordinary course of business. While the outcome of these matters is currently not determinable, we do not expect that the ultimate costs to resolve these matters will have a material adverse effect on our consolidated financial position or results of operations. However, litigation is subject to inherent uncertainties, and unfavorable rulings could occur. If an unfavorable ruling were to occur, there exists the possibility of a material adverse impact on the financial position, results of operations and cash flows of the period in which the ruling occurs, or future periods.

~~In addition to~~An investment in our common stock involves a high degree of risk. You should carefully consider the risks described below and the other information ~~set forth~~ in this Quarterly Report on Form 10-Q, our Annual Report on Form 10-K for the year ended December 31, 2019 and in other filings we make with the SEC before making an investment decision. Our business, prospects, financial condition, or operating results could be harmed by any of these risks, as well as other risks not currently known to us or that we currently consider immaterial. If any of such risks and uncertainties actually occurs, our business, financial condition or operating results could differ materially from the plans, projections and other forward-looking statements included in the section titled “Management’s Discussion and Analysis of Financial Condition and Results of Operations” and elsewhere in this report and in our other public filings. The trading price of our common stock could decline due to any of these risks, and, as a result, you ~~should carefully~~may lose all or part of your investment.

The COVID-19 pandemic has had a material impact on our business and could have a further material adverse effect on our business, financial condition and results of operations.

The COVID-19 pandemic has had a significant impact on our first quarter 2020 results, resulting in decreased revenues, and may continue to have a significant impact on our results for the remainder of 2020 and beyond, as we have experienced a negative impact on our global supply chain and softer product demand due to the effects of the pandemic. Given the ongoing and dynamic nature of the virus and the worldwide response related thereto, it is difficult to predict the full impact of the COVID-19 outbreak on our business. The impact of a continued COVID-19 outbreak or sustained measures taken to limit or contain the outbreak could continue to have a material adverse effect on our business, financial condition, results of operations, and cash flows.

Our suppliers and contract manufacturers could fail to provide equipment or service on a timely basis as a result of disruption to the global supply chain due to the ongoing COVID-19 pandemic. If such failures occur, we may be unable to provide products and services as and when requested by our customers, or we may be unable to continue to maintain or upgrade our networks. Because of the cost and delays that can be associated with transitioning from one supplier to another, our business could be substantially disrupted if we were required to, or chose to, replace the products or services of one or more major suppliers with products or services from another source, especially if the replacement became necessary on short notice. Any such disruption could increase our costs, decrease our operating efficiencies and have a material adverse effect on our business and financial condition.

The extent to which the ongoing COVID-19 pandemic impacts us will depend on numerous evolving factors and future developments that we are not able to predict, including:

A sustained shelter-in-place order could adversely impact our operations and workforce, and remote working conditions could increase our susceptibility to a data breach.

In response to the ongoing COVID-19 pandemic, many local and state governments, including the state of California where our corporate headquarters are presently located, have instituted emergency restrictions that have substantially limited the operation of non-essential businesses and the activities of individuals. As a result, the majority of our workforce is working remotely from their homes. Remote working conditions may negatively affect our workforce’s productivity, result in disruptions to workflow and operations or make it more difficult for us to maintain proper internal controls over our financial reporting. Further, while we have taken steps to ensure the security of our data and to prevent security breaches, including through the use of authentications and VPNs, many of these measures are being deployed for the first time on a widespread and sustained basis, and there is no guarantee the data security and privacy safeguards we have put in place will be completely effective or that we will not encounter some of the common risks associated with employees accessing Company data and systems remotely. As a result, we may be required to expend significant capital and other resources to protect against security breaches or to alleviate problems caused by security breaches.

Many of our customers operate in industries that have been disproportionately impacted by the COVID-19 pandemic, and the virus’s negative impact on their financial conditions and results of operations could have an adverse impact on our revenue.

While the industry in which we operate has not directly impacted to the same extent as other industries, many of our customers in our Enterprise FiberLAN™ business operate in industries such as hospitality, education and stadiums/facilities management, each of which has been greatly impacted by the ongoing COVID-19 pandemic and the protective measures put in place by the local and state governments of the regions in which they operate, such as shelter-in-place orders, business closures, travel restrictions and cancellations of large events. The adverse impacts that the virus and the accompanying protective measures have on our customers may influence their ability to purchase our products and solutions, make payments under their contracts with us, or it may lower their demand for our products and solutions as they take measures to cut costs and protect their businesses. As a result, our revenue may decline, which could have a material adverse effect on our results of operations and financial condition.

The ongoing COVID-19 pandemic could have a negative impact on the health of our employees which could be disruptive to our business and operations and may negatively impact productivity.

The ongoing COVID-19 pandemic has spread rapidly throughout the United States and the other regions in which we operate. As of March 31, 2020, there have been more than 900,000 positive tests for COVID-19 across the globe, with approximately 200,000 in the United States. The longer the pandemic continues, the more likely it is that one or more of our employees could contract the virus. If the virus spreads over a large portion of our workforce, it could have a material adverse effect on our operations. Additionally, if any of our executive officers were to test positive for COVID-19, it could have an adverse effect on our operations, including increased responsibilities for other executives, disruptions in operations or the inability of our executives to focus on essential Company business.

In addition, depending on the extent and duration of the ongoing COVID-19 pandemic, we may be subject to significant increases in healthcare costs if a significant number of our personnel become infected with COVID-19 and require medical treatment. As a result, any significant increases in healthcare costs as a result of COVID-19 or otherwise could have a material adverse impact on our business, financial condition and results of operations.

We have applied for government assistance under the CARES Act and a small business aid program administered by the German government. There can be no assurance that we or our subsidiaries will qualify for assistance under these or other programs. If we or our subsidiaries do qualify, there is no certainty as to the amount of assistance we will receive.

The CARES Act was enacted on March 27, 2020 and is an approximate $2 trillion emergency economic stimulus package passed in response to the COVID-19 pandemic. The CARES Act includes broad sweeping provisions including direct financial assistance to Americans in the form of one-time payments to individuals; aid to certain eligible businesses in the form of loans and grants; efforts to stabilize the U.S. economy and keep Americans employed in general; and support for healthcare professionals, patients and hospitals. Also included in the CARES Act are numerous income tax provisions including changes to the Net Operating Loss (“NOL”) rules and the business interest expense deduction rules under Internal Revenue Code Section 163(j). Factors that could affect our ability to receive funding include the finalization of regulations under the CARES Act and exhaustion of available funds, among other factors. Due to the recent enactment of this legislation, there is a high degree of uncertainty around its implementation and we continue to assess the potential impacts of this legislation on our business, results of operations, financial condition and cash flows. While the Company has made application for aid under the CARES Act and may make future application under other provisions of the act, there can be no assurance that we will receive any aid or funding under the CARES Act.

Additionally, the Company has applied for a loan under the German COVID-19 government aid package and may evaluate and consider application under other COVID-19 related foreign and domestic aid programs in the future. There can be no assurances that the Company will be approved for aid under any of these programs, and if approved, whether funding will be available at all or on conditions that are acceptable to the Company. While we may receive financial, tax or other relief and other benefits under and as a result of these assistance programs or others, it is not possible to estimate at this time the extent or impact of any such relief.

As of March 31, 2020, the aggregate principal amount of our outstanding indebtedness was $39.7 million, consisting of $12.3 million in principal amount of outstanding borrowings under our short-term debt obligations and $27.4 million in long-term related party borrowings. On March 5, 2020, DASAN Network Solutions, Inc., a corporation organized under the laws of the Republic of Korea, and an indirect, wholly owned subsidiary of the Company (“DNS Korea”) entered into a Loan Agreement with DNI, pursuant to which DNS Korea borrowed KRW 22.4 billion ($18.5 million USD) from DNI (the “March 2020 DNI Loan”). DNS Korea loaned such borrowed funds to the Company, a portion of which were used to repay and terminate the Company’s prior credit facilities with PNC Bank, National Association.

In the event of a default and acceleration of our obligations under the March 2020 DNI Loan, we may not be able to obtain replacement financing at all or on commercially reasonable terms or on terms that are acceptable to us. Our level of indebtedness could have important consequences and could materially and adversely affect us in a number of ways, including:

The agreements governing the March 2020 DNI Loan and the instruments governing our other indebtedness contain certain covenants, limitations, and conditions with respect to the Company and its subsidiaries, including financial reporting obligations and customary events of default and require that certain of our assets be pledged as collateral for such loans. These terms, conditions and collateral requirements could restrict our ability to operate our business. If an event of default occurs under the March 2020 DNI Loan, DNI will be entitled to take various actions, including requiring the immediate repayment of all outstanding amounts borrowed under the March 2020 DNI Loan and seizing and/or selling the assets of the Company and the subsidiary guarantors to satisfy the obligations under the March 2020 DNI Loan.

We cannot assure you that we will be able to generate cash flow in amounts sufficient to enable us to service our debt or to meet our working capital and capital expenditure requirements. If we are unable to generate sufficient cash flow from operations or to borrow sufficient funds to service our debt, we may be required to sell assets, reduce capital expenditures, purchase credit insurance or obtain additional financing. We cannot assure you that we will be able to engage in any of these actions on reasonable terms, if at all.

We may need additional capital, and we cannot be certain that additional financing will be available.

We need sufficient capital to fund our ongoing operations and may require additional financing in the future to expand our business, acquire assets or repay or refinance our existing debt. Our ability to obtain financing will depend, among other things, on our development efforts, business plans, operating performance and condition of the capital markets at the time we seek financing, any of which have been and may continue to be adversely impacted by the ongoing COVID-19 pandemic. We cannot assure you that additional financing will be available to us on favorable terms when required, or at all. Additionally, while there are no covenants in the March 2020 DNI Loan restricting our ability, or the ability of our subsidiaries, to borrow additional funds, the collateral requirements under the March 2020 DNI Loan may make it difficult to for us to obtain additional secured financing. If we raise additional funds through the issuance of equity, equity-linked or debt securities, those securities may have rights, preferences or privileges senior to the rights of our common stock, and our stockholders may experience dilution.

If we need additional capital and cannot raise it on acceptable terms, we may not be able to, among other things:

Our failure to do any of these things could seriously harm our business, financial condition, liquidity and operating results. In addition, we may be required to reduce the scope of our planned product development and sales and marketing efforts beyond the reductions that we have previously taken, and reduce operations in low margin regions, including reductions in headcount, which could have a material adverse effect on our business, operations, financial condition and liquidity.

We may not have the liquidity to support our future operations and capital requirements.

As of March 31, 2020, we had approximately $26.4 million in cash and cash equivalents, including $8.7 million in cash balances held by our international subsidiaries. If our operating performance does not improve, and we are unable to raise additional capital (as discussed in the prior risk factor), we may be unable to adequately fund our existing operations. Our current liquidity condition exposes us to the following risks:

Our current liquidity condition could be further harmed, and we may incur significant losses or expend significant amounts of capital if:

To meet our liquidity needs and to finance our capital expenditures and working capital needs for our business, we may be required to raise substantial additional capital, reduce our operations (including through the sale of assets or expense reduction measures) or both.

We have experienced significant losses and we may incur losses in the future. If we fail to generate sufficient revenue to sustain our profitability, our stock price could decline.

We had a net loss of $8.8 million for the three months ended March 31, 2020, and a net loss of $13.3 million for the year ended December 31, 2019. Additionally, we have incurred significant losses in years prior to 2019. We have an accumulated deficit of $38.0 million as of March 31, 2020. We have significant fixed expenses and expect that we will continue to incur substantial manufacturing, research and product development, sales and marketing, customer support, administrative and other expenses in connection with the operation of our business. In addition, we may be required to spend more on research and product development than originally budgeted to respond to industry trends. We may also incur significant new costs related to acquisitions and the integration of new technologies and other acquisitions that may occur in the future. We may not be able to adequately manage costs and expenses or achieve or maintain adequate operating margins. As a result, our ability to sustain profitability in future periods will depend on our ability to generate and sustain higher revenue while maintaining reasonable costs and expense levels. If we fail to generate sufficient revenue to sustain profitability in future periods, we may continue to incur operating losses, which could be substantial, and our stock price could decline.

Our future operating results are difficult to predict, and our stock price may continue to be volatile.

As a result of a variety of factors discussed in ~~Part I, "Item 1A, Risk Factors”~~this Quarterly Report on Form 10-Q and our Annual Report on Form 10-K for the year ended December 31, 2019, our revenues for a particular quarter are difficult to predict. Our revenue and operating results may vary significantly from quarter to quarter due to a number of factors, many of which are outside of our control. The primary factors that could affect our results of operations include the following:

Any of the foregoing factors, or any other factors discussed elsewhere herein or in our Annual Report on Form 10-K for the year ended December 31, ~~2018,~~2019, could have a material adverse effect on our business, operations, financial condition and liquidity that could adversely affect our stock price. Further, the ongoing COVID-19 pandemic has resulted in severe disruption and volatility in the financial markets. We anticipate that our stock price and trading volume may be volatile in the future, whether due to the factors described above, volatility in public stock markets generally or otherwise.

In connection with the Keymile Acquisition, we assumed certain of Keymile’s liabilities, which could ~~materially affect~~harm our business, operations, financial condition, ~~or future results. Except as provided below, there have been no material changes~~and liquidity.

Pursuant to the ~~risk factors described~~definitive agreement for the Keymile Acquisition, we assumed certain of Keymile’s liabilities, including tax and pension liabilities, and any liabilities that may arise related to breaches of representations and warranties made by Keymile in connection with a prior sale of assets by Keymile that survive through 2022. Although the definitive agreement for the Keymile Acquisition entitles us to indemnification for certain losses incurred related to those assumed liabilities, our right to indemnification from the Keymile sellers is limited by the survival period of the representations and warranties included in the ~~"Risk Factors" section~~Keymile Acquisition definitive agreement and recovery is limited in amount to the purchase price of Keymile, or EUR 10.3 million. Additionally, our ~~Annual Report on Form 10-K for the year ended December 31, 2018. The risks described in~~rights to recovery against such losses is limited under our ~~Annual Report on Form 10-K~~and third party provided warranty and indemnity liability insurance coverage of up to EUR 35.3 million. If such claims or losses exceed such amount, or if they are not indemnifiable under the ~~only risks facing~~Keymile Acquisition definitive agreement, any such losses could negatively impact our ~~company. Additional risks~~financial situation. In addition, our closing of the Keymile Acquisition could give rise to substantial tax liabilities under German law, which could negatively impact our financial condition and ~~uncertainties not currently known to us~~liquidity.

Strategic acquisitions or investments that we have made or that we ~~currently deem~~could pursue or make in the future may disrupt our operations and harm our business, operations, financial condition, and liquidity.

As part of our business strategy, we have made investments in and acquired other companies, including Keymile in 2019, that we believe are complementary to our core business. In the future we may continue to make investments in or acquire other companies or complementary solutions or technologies. Any such acquisition or investment may divert the attention of management and cause us to incur various expenses in identifying, investigating, and pursuing suitable opportunities, whether or not the transactions are completed, and may result in unforeseen operating difficulties and expenditures. These transactions could also result in dilutive issuances of equity securities, the incurrence of debt or assumption of liabilities, and increase our risk of litigation exposure, which could adversely affect our operating results. In addition, if the resulting business from such a transaction fails to meet our expectations, our operating results, business, and financial condition may suffer or we may be ~~immaterial also~~exposed to unknown risks or liabilities.

Additionally, any significant acquisition would require the consent of our lenders. Any failure to receive such consent could delay or prohibit us from acquiring companies that we believe could enhance our business. Furthermore, we may dedicate significant time and capital resources in the pursuit of acquisition opportunities and may be unable to find and identify desirable acquisition targets or business opportunities or be successful in entering into an agreement with any particular strategic partner.

Upon the closing of any acquisition transaction, we will need to integrate the acquired organization and its products and services with our legacy operations. The integration process may be expensive, time-consuming and a strain on our resources and our relationships with employees, customers, distributors and suppliers, and ultimately may not be successful. The benefits or synergies we may expect from the acquisition of complementary or supplementary businesses may not be realized to the extent or in the time frame we initially anticipated. Mergers and acquisitions of high-technology companies are inherently subject to increased risk and to many factors outside of our control, and we cannot be certain that our previous or future acquisitions will be successful and will not materially adversely affect our business, operations, financial condition, and liquidity. Any failure to successfully acquire and integrate acquired organizations and their products and services could seriously harm our business, operations, financial condition, and liquidity.

Some of the risks that could affect our ability to successfully integrate acquired businesses, including Keymile’s telecommunication systems business, include those associated with:

We have material weaknesses in our internal control over financial reporting, and we cannot provide assurances that these weaknesses will be effectively remediated or that additional material weaknesses will not occur in the future. If our internal control over financial reporting or our disclosure controls and procedures are not effective, we may not be able to accurately report our financial results, prevent fraud or file our periodic reports in a timely manner, which may cause investors to lose confidence in our reported financial information and which may lead to a decline in our stock price.

We are responsible for establishing and maintaining adequate internal control over financial reporting to provide reasonable assurance regarding the reliability of our financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. We assessed the effectiveness of our internal control over financial reporting as of December 31, 2019, the end of our fiscal year. In making this assessment, management used the criteria established in Internal Control - Integrated Framework (2013) issued by the Committee Sponsoring Organizations of the Treadway Commission. Based on our assessment, we have concluded that, as of December 31, 2019, our internal control over financial reporting was not effective because of the unremediated material weaknesses in our internal control over financial reporting described below.

Management determined that the Company did not maintain a sufficient complement of personnel with appropriate accounting knowledge, experience and training in the application of generally accepted accounting principles in the United States (“U.S. GAAP”), including accounting for significant unusual transactions. In addition, the Company did not maintain an effective control environment as it did not appropriately identify internal controls over inventory valuation and revenue. Also, management determined that the Company did not design and maintain effective controls over the financial closing process, including controls surrounding monitoring and review of the activity of its foreign subsidiaries. These material weaknesses could result in a misstatement in the financial statements that would result in a material misstatement in the annual or interim consolidated financial statements that would not be prevented or detected.

If we are not able to correct material weaknesses or deficiencies in internal controls in a timely manner, our ability to record, process, summarize and report financial information accurately and within the time periods specified in the SEC’s rules and forms will be adversely affected. Such a result could negatively impact the market price and trading liquidity of our common stock, weaken investor confidence in our reported financial information, subject us to civil and criminal investigations and penalties, and generally materially and adversely affect our business and financial condition.

~~DNI owns a significant amount of~~The long and variable sales cycles for our ~~outstanding common stock~~products could cause revenue and ~~has the ability~~operating results to ~~exert significant influence or control over any matters that require stockholder approval, including the election of directors and the approval of certain transactions, and DNI’s interests~~ ~~may conflict with our interests and the interests of other stockholders~~vary significantly from quarter to quarter.

AsThe target customers for our products have substantial and complex networks that they traditionally expand in large increments on a periodic basis. Accordingly, our marketing efforts are focused primarily on prospective customers that may purchase our products as part of ~~September 30, 2019, DNI owned approximately 44.4% of~~a large-scale network deployment. Our target customers typically require a lengthy evaluation, testing and product qualification process. Throughout this process, we are often required to spend considerable time and incur significant expenses educating and providing information to prospective customers about the ~~outstanding shares~~uses and features of our ~~common stock, representing~~ products. Even after a ~~significant amount~~company makes the final decision to purchase our products, it could deploy our products over extended periods of ~~the votes entitled to be cast by the holders~~time. The timing of deployment of our ~~outstanding common stock at~~products varies widely, and depends on a ~~stockholder meeting. Due~~number of factors, including our customers’ skill sets, geographic density of potential subscribers, the degree of configuration and integration required to ~~its significant ownership percentage~~deploy our products, and our customers’ ability to finance their purchase of our ~~common stock~~ ~~DNI has the ability to substantially influence or control the outcome~~products as well as their operations. As a result of any ~~matter submitted for the vote~~ of these factors, our ~~stockholders, including the election of directors~~revenue and ~~the approval of certain transaction.~~ operating results could vary significantly from quarter to quarter.

The ~~interests of DNI~~market we serve is highly competitive and we may ~~conflict with the interests of our other stockholders or with holders of our indebtedness and may cause us~~not be able to ~~take actions that our other stockholders or holders of our indebtedness do not view as beneficial.~~compete successfully.

Competition in communications equipment markets is intense. These markets are characterized by rapid change, converging technologies and a migration to networking solutions that offer superior advantages. We are aware of many companies in related markets that address particular aspects of the features and functions that our products provide. Currently, our primary competitors in our core business include ADTRAN, Calix, Huawei, Nokia and ZTE, among others. In our FiberLAN business, our competitors include Cisco, Nokia and Tellabs. In our Ethernet switching business, our competitors include Cisco, and Juniper. We also may face competition from other communications equipment companies or other companies that may enter our markets in the future. In addition, a number of companies have introduced products that address the same network needs that our products and solutions address, both domestically and internationally. Many of our competitors have longer operating histories, greater name recognition, larger customer bases and greater financial, technical, sales and marketing resources than we do and may be able to undertake more extensive marketing efforts, adopt more aggressive pricing policies and provide more customer financing than we can. In particular, we are encountering price-focused competitors from Asia, especially China, which places pressure on us to reduce our prices. If we are forced to reduce prices in order to secure customers, we may be unable to sustain gross margins at desired levels or achieve profitability. Competitive pressures could result in increased pricing pressure, reduced profit margins, increased sales and marketing expenses and failure to increase, or the loss of, market share, any of which could reduce our revenue and adversely affect our financial results. Moreover, our competitors may foresee the course of market developments more accurately than we do and could develop new technologies that render our products less valuable or obsolete.

In ~~addition, DNI’s large concentration~~our markets, principal competitive factors include:

If we are unable to compete successfully against our current and future competitors, we may ~~make it more difficult for a third party to acquire~~ ushave difficulty obtaining or ~~discourage a third party from seeking to acquire us.~~ ~~A potential third party acquirer would be required to negotiate~~retaining customers, and we could experience price reductions, order cancellations, increased expenses and reduced gross margins, any ~~such transaction with DNI, and the interests~~ of ~~DNI with respect to such transaction may be different from the interests of our other stockholders or with holders of our indebtedness.~~

~~Prior to May 20, 2019, DNI owned in excess of 50% of the outstanding shares of our common stock,~~ which allowed us to elect to be treated as a “controlled company” under Nasdaq Marketplace Rules. As a “controlled company,” we were exempt from certain corporate governance requirements under Nasdaq Marketplace Rules, including the requirement that wecould have a ~~majority of independent directors~~material adverse effect on ~~the Board of Directors~~our business, operations, financial condition, and requirements with respect to compensation and nominating and corporate governance committees. Following the loss of “controlled company” status, we are required to phase in compliance with the Nasdaq corporate governance requirements over a one-year period.liquidity.

Our amended and restated bylaws provide that the Court of Chancery of the State of Delaware will be the sole and exclusive forum for substantially all disputes between us and our stockholders (except for causes of action arising under the federal securities laws), which could limit our stockholders’ ability to obtain a favorable judicial forum for disputes with us or our directors, officers, or employees.

~~Our amended and restated bylaws (our “Bylaws”) provide that the Court of Chancery of the State of Delaware is the sole and exclusive forum for:~~

~~provided, that with respect to any derivative action or proceeding brought~~If demand for our products and solutions does not develop as we anticipate, then our business operations, financial condition, and liquidity will be adversely affected.

Our future revenue depends significantly on our ~~behalf~~ability to ~~enforce any liability~~successfully develop, enhance and market our products and solutions to our target markets. Most network service providers have made substantial investments in their current infrastructure, and they may elect to remain with their current architectures or ~~duty~~to adopt new architectures in limited stages or over extended periods of time. A decision by a customer to purchase our products will involve a significant capital investment. We must convince our service provider customers that they will achieve substantial benefits by deploying our products for future upgrades or expansions. We may experience difficulties with product reliability, partnering, and sales and marketing efforts that could adversely affect our business and divert management attention and resources from our core business. We do not know whether a viable market for our products and solutions will develop or be sustainable in our businesses. If these markets do not develop or develop more slowly than we expect, including as a result of conditions created by the ~~Exchange Act or the rules~~ongoing COVID-19 pandemic, our business, operations, financial condition and ~~regulations thereunder, the exclusive forum~~liquidity will be materially harmed.

We depend upon the ~~federal district courts~~development of new products and enhancements to existing products, and if we fail to predict and respond to emerging technological trends and customers’ changing needs, our operating results and market share may suffer.

The markets for our products are characterized by rapidly changing technology, evolving industry standards, changes in end-user requirements, frequent new product introductions and changes in communications offerings from network service provider customers. Our future success depends on our ability to anticipate or adapt to such changes and to offer, on a timely and cost-effective basis, products that meet changing customer demands and industry standards. We may not have sufficient resources to successfully and accurately anticipate customers’ changing needs and technological trends, manage long development cycles or develop, introduce and market new products and enhancements. The process of developing new technology is complex and uncertain, and if we fail to develop new products or enhancements to existing products on a timely and cost-effective basis, or if our new products or enhancements fail to achieve market acceptance, our business, operations, financial condition and liquidity would be materially adversely affected.

Because our products are complex and are deployed in complex environments, our products may have defects that we discover only after full deployment by our customers, which could have a material adverse effect on our business.

We produce highly complex products that incorporate leading-edge technology, including both hardware and software. Software often contains defects or programming flaws that can unexpectedly interfere with expected operations. In addition, our products are complex and are designed to be deployed in large quantities across complex networks. Because of the ~~United States.~~ ~~The exclusive forum provision~~nature of these products, they can only be fully tested when completely deployed in large networks with high amounts of traffic, and there is no assurance that our pre-shipment testing programs will be adequate to detect all defects. As a result, our customers may discover errors or defects in our ~~Bylaws does not apply to resolving any complaint asserting a cause of action arising under the Securities Act.~~

~~These exclusive forum provisions may limit a stockholder’s ability to bring a claim in a judicial forum that it finds favorable for disputes with us~~hardware or software, or our ~~directors, officers,~~products may not operate as expected. If we are unable to cure a product defect, we could experience damage to our reputation, reduced customer satisfaction, loss of existing customers and failure to attract new customers, failure to achieve market acceptance, reduced sales opportunities, loss of revenue and market share, increased service and warranty costs, diversion of development resources, legal actions by our customers, and increased insurance costs. Defects, integration issues or other ~~employees, which may discourage lawsuits against us and our directors, officers and other employees. If a court were to find the exclusive forum provision~~performance problems in our ~~Bylaws~~products could also result in damages to ~~be inapplicable~~our customers, financial or ~~unenforceable in an action, we may incur additional costs associated with resolving the dispute in other jurisdictions,~~otherwise. Our customers could seek damages for related losses from us, which could seriously harm our ~~business. For example, the Court~~business, operations, financial condition and liquidity. A product liability claim brought against us, even if unsuccessful, would likely be time consuming and costly. The occurrence of ~~Chancery~~any of the State of Delaware recently determined that the exclusive forum provision of federal district courts of the United States for resolving any complaint asserting a cause of action arising under the Securities Act is not enforceable. However, this decision may be reviewedthese problems would seriously harm our business, operations, financial condition and ~~ultimately overturned by the Delaware Supreme Court.~~liquidity.

Increased tariffs on products and goods that we purchase from off-shore sources (particularly Chinese sources) and changes in international trade policies and relations could have an adverse effect on our customers and operating results.

The pricing of our products to customers and our ability to conduct business with certain customers can be affected by changes in U.S. and other countries’ trade policies. For example, while a trade deal was signed between the U.S. and China on January 15, 2020 that signals a cooling of tensions between the U.S. and China over trade, concerns over the stability of bilateral trade relations remain. Before the trade deal, the United States ~~has~~had recently imposed tariffs on a wide-range of products and goods manufactured in China that are directly or indirectly imported into the United ~~States, and it has announced plans to impose additional tariffs on products and goods manufactured in China.~~States. In response, various countries and economic regions ~~have~~ announced plans or intentions to impose retaliatory tariffs on a wide-range of products they import from the United States. ~~These~~Any newly imposed, announced and threatened U.S. tariffs and retaliatory tariffs could have the effect of increasing the cost of materials we use to manufacture certain products, which could result in lower margins. The tariffs could also result in disruptions to our supply chain, as suppliers struggle to fill orders from companies trying to purchase goods in bulk ahead of announced tariffs. Although we ~~currently~~ believe that the incremental costs to us of ~~these~~recent tariffs ~~will be~~was immaterial, if ~~the amount of these~~new tariffs ~~increases~~are imposed or if ~~the~~new tariffs apply to additional categories of components used in our manufacturing activities, and if we are unable to pass on the costs of tariffs to our customers, our operating results would be harmed. In addition, changes in the political environment, governmental policies, international trade policies and relations, or U.S.-China relations could result in revisions to laws or regulations or their interpretation and enforcement, trade sanctions, or retaliatory actions by China in response to U.S. actions, which could have an adverse effect on our customers, business plans and operating results.

Sales to communications service providers are especially volatile, and weakness in sales orders from this industry could harm our business, operations, financial condition and liquidity.

~~Until~~Sales activity in the service provider industry depends upon the stage of completion of expanding network infrastructures, the availability of funding, and the extent to which service providers are affected by regulatory, economic and business conditions in the country of operations. Although some service providers may be increasing capital expenditures over the depressed levels that have prevailed over the last few years, weakness in orders from this industry could have a material adverse effect on our business, operations, financial condition and liquidity. Changes in technology, competition, overcapacity, changes in the service provider market, regulatory developments, adverse economic effects caused by the COVID-19 pandemic and constraints on capital availability have had a material adverse effect on many of our service provider customers, with many of these customers going out of business or substantially reducing their expansion plans. These conditions have materially harmed our business and operating results, and we expect that some or all of these conditions may continue for the foreseeable future. Finally, service provider customers typically have longer implementation cycles; require a broader range of services including design services; demand that vendors take on a larger share of risks; often require acceptance provisions, which can lead to a delay in revenue recognition; and expect financing from vendors. All these factors can add further risk to business conducted with service providers.

We rely on contract manufacturers for a portion of our manufacturing requirements.

We rely on contract manufacturers to perform a portion of the manufacturing operations for our products. These contract manufacturers build products for other companies, including our competitors. In addition, we do not have contracts in place with some of these providers and may not be able to effectively manage those relationships. We cannot be certain that our contract manufacturers will be able to fill our orders in a timely manner. We face a number of risks associated with this dependence on contract manufacturers including reduced control over delivery schedules, the potential lack of adequate capacity during periods of excess demand, poor manufacturing yields and high costs, quality assurance, increases in prices, and the potential misappropriation of our intellectual property. We have experienced in the past, and may experience in the future, problems with our contract manufacturers, such as inferior quality, insufficient quantities and late delivery of products.

A shortage of adequate component supply or manufacturing capacity could increase our costs or cause a delay in our ability to fulfill orders, and our failure to estimate customer demand properly could result in excess or obsolete component inventories that could adversely affect our gross margins.

Occasionally, we may experience a supply shortage, or a delay in receiving, certain component parts as a result of strong demand for the component parts and/or capacity constraints or other problems experienced by suppliers. If shortages or delays persist, the price of these components may increase, or the components may not be available at all, and we may also encounter shortages if we do not accurately anticipate our needs. Conversely, we may not be able to secure enough components at reasonable prices or of acceptable quality to build new products in a timely manner in the quantities or configurations needed. Accordingly, our revenue and gross margins could suffer until other sources can be developed. Our operating results would also be adversely affected if, anticipating greater demand than actually develops, we commit to the purchase of more components than we need. Furthermore, as a result of binding price or purchase commitments with suppliers, we may be obligated to purchase components at prices that are higher than those available in the current market. In the event that we become committed to purchase components at prices in excess of the current market price, our gross margins could decrease. In the past we experienced component shortages that adversely affected our financial results and, in the future, may continue to experience component shortages.

We depend on a limited source of suppliers for several key components. If we are unable to obtain these components on a timely basis, we will be unable to meet our customers’ product delivery requirements, which would harm our business.

We currently purchase several key components from a limited number of suppliers. If any of our limited source of suppliers become insolvent, cease business or experience capacity constraints, work stoppages or any other reduction or disruption in output, they may be unable to meet our delivery schedules. Our suppliers may enter into exclusive arrangements with our competitors, be acquired by our competitors, stop selling their products or components to us at commercially reasonable prices, refuse to sell their products or components to us at any price or be unable to obtain or have difficulty obtaining components for their products from their suppliers. If we do not receive critical components from our limited source of suppliers in a timely manner, we will be unable to meet our customers’ product delivery requirements. Any failure to meet a customer’s delivery requirements could materially adversely affect our business, operations, and financial condition and liquidity and could materially damage customer relationships.

The loss of a key customer or a significant deterioration in the financial condition of a key customer could have a material adverse effect on the Company’s results of operations.

The Company’s revenue is dependent on several key customers. A loss of one or more of the Company’s key customers, or a dispute or litigation with one of these key customers could affect adversely our revenue and results of operations. A significant deterioration in the financial condition or bankruptcy filing of a key customer could affect adversely the Company’s business, results of operations, and financial condition.

In addition, the Company ~~hires~~is subject to credit risk associated with the concentration of accounts receivable from its key customers. As of March 31, 2020, two (2) customers each represented 19% of net accounts receivable, respectively. As of December 31, 2019, two (2) customers represented 18% and 11% of net accounts receivable. If one or more of the Company’s top customers were to become bankrupt or insolvent or otherwise were unable to pay for the products and services provided by the Company, including as a ~~permanent Chief Financial Officer,~~result of conditions created by the COVID-19 pandemic, the Company may incur significant write-offs of accounts receivable or incur other impairment charges, which may have a material adverse effect on the Company’s results of operations.

We have experienced significant turnover with respect to our ~~Chief Executive Officer will also~~executives and our board, and our business could be ~~serving as~~adversely affected by these and other transitions in our ~~interim Chief Financial Officer, which could have an adverse impact~~senior management team or if any future vacancies cannot be filled with qualified replacements in a timely manner.

~~Following~~executive team and board in both 2018 and 2019, including the ~~formerly-announced resignation~~departure of our former ~~Chief Financial Officer, Michael Golomb, Mr. Il Yung Kim, the Chief Executive Officer of the Company, was appointed to serve as our interim~~ Chief Financial Officer. As a result of this ~~change, Mr. Il Yung Kim~~turnover, our remaining management team has ~~taken~~been required to take on ~~substantially more responsibility~~increased responsibilities, which could divert attention from key business areas. If we continue to experience similar turnover in the future, we may be unable to timely replace the talent and skills of our management team and directors.

Management transitions are often difficult and inherently cause some loss of institutional knowledge, which could negatively affect our results of operations and financial condition. Our ability to execute our business strategies may be adversely affected by the uncertainty associated with these transitions and the time and attention from the board and management needed to fill any future vacant roles could disrupt our business. If we are unable to successfully identify and attract adequate replacements for future vacancies in our management roles in a timely manner, we could experience increased employee turnover and harm to our business, growth, financial condition, results of operations and cash flows. We face significant competition for executives with the ~~management~~qualifications and experience we seek.

Further, we cannot guarantee that we will not face similar turnover in the future. Our senior management’s knowledge of our business and industry would be difficult to replace, and any further turnover could negatively affect our business, growth, financial conditions, results of ~~our financial reporting, which has resulted in greater workload demands~~operations and cash flows.

Decreased effectiveness of share-based compensation could divert his attention away from certain key areas of our business. Mr. Kim’s serving in a temporary dual capacity of Chief Executive Officer and interim Chief Financial Officer of the Company may have a disruptive impact onadversely affect our ability to ~~implement~~attract and retain employees.

We have historically used equity incentives, including stock options, as a key component of our ~~strategy~~employee compensation program in order to align the interests of our employees with the interests of our stockholders, encourage employee retention and provide competitive compensation and benefit packages. If the trading price of our common stock declines, this would reduce the value of our share-based compensation to our present employees and could adversely affect our ability to retain existing or attract prospective employees. Difficulties relating to obtaining stockholder approval of equity compensation plans could also make it harder or more expensive for us to grant share-based payments to employees in the future.

Our success largely depends on our ability to retain and recruit key personnel, and any failure to do so could harm our ability to meet key objectives.

Our future success depends upon the continued services of our Chief Executive Officer and other key employees, and our ability to identify, attract and retain highly skilled technical, managerial, sales and marketing personnel who have critical industry experience and relationships that we rely on to build and operate our business. The loss of the services of any of our key employees, including our Chief Executive Officer, could delay the development and production of our products and negatively impact our ability to maintain customer relationships, which could harm our business, operations, financial condition and liquidity. Moreover, our historical inability to attract and retain sufficient qualified accounting personnel with expertise in U.S. GAAP has adversely affected our ability to maintain an effective system of internal controls and our ability to produce reliable financial reports, which could materially and adversely affect our business.

Many of our products are designed to include software or other intellectual property licensed from third parties. It may be necessary in the future to seek or renew licenses relating to various elements of the technology used to develop these products. We cannot assure you that our existing or future third-party licenses will be available to us on commercially reasonable terms, if at all. Our inability to maintain or obtain any third-party license required to sell or develop our products and product enhancements could require us to obtain substitute technology of lower quality or performance standards, or at greater cost.

We generally rely on a combination of copyrights, patents, trademarks and trade secret laws and commercial agreements containing restrictions on disclosure and other appropriate terms to protect our intellectual property rights. We enter into confidentiality, employee, contractor and commercial agreements with our employees, consultants and corporate partners, and control access to and distribution of our proprietary information and use of our intellectual property and technology. Despite our efforts to protect our proprietary rights, unauthorized parties, including those affiliated with foreign governments, may attempt to copy or otherwise obtain and use our products, technology or intellectual property. Monitoring unauthorized use of our technology and intellectual property is difficult, and we do not know whether the steps we have taken will prevent unauthorized use of our technology, particularly in foreign countries or jurisdictions where laws may not protect our proprietary rights as extensively as in the United States. We cannot assure you that our pending, or any future, patent applications will be granted, that any existing or future patents will not be challenged, invalidated, or circumvented, or that any existing or future patents will be enforceable or that infringement by third parties will even be detected. While we are not dependent on any individual patents, if we are unable to protect our proprietary rights, we may find ourselves at a competitive disadvantage to others who need not incur the substantial expense, time and effort required to create the innovative products.

There are additional risks to our intellectual property as a result on our international business operations.

We may face risks to our technology and intellectual property as a result of our conducting strategic business discussions outside of the United States, and particularly in jurisdictions that do not have comparable levels of protection of corporate proprietary information and assets such as intellectual property, trademarks, trade secrets, know-how and customer information and records. While these risks are common to many companies, conducting business in certain foreign jurisdictions, housing technology, data and intellectual property abroad, or licensing technology to joint ventures with foreign partners may have more significant exposure. For example, we have shared intellectual properties with entities in China, South Korea, India, Thailand, and Vietnam pursuant to confidentiality agreements in connection with discussions on potential strategic collaborations, which may expose us to material risks of theft of our proprietary information and other intellectual property, including technical data, manufacturing processes, data sets or other sensitive information. For example, our technology may be reverse engineered by the parties or other parties, which could result in our patents being infringed or our know-how or trade secrets stolen. The risk can be by direct intrusion wherein technology and intellectual property is stolen or compromised through cyber intrusions or physical theft through corporate espionage, including with the assistance of insiders, or via more indirect routes.

Claims that our current or future products or components contained in our products infringe the intellectual property rights of others may be costly and time consuming to defend and could adversely affect our ability to sell our products.

The communications equipment industry is characterized by the existence of a large number of patents and frequent claims and related litigation regarding patent, copyright, trademark and other intellectual property rights, that may relate to technologies and related standards that are relevant to us. From time to time, we receive correspondence from companies claiming that our products are using technology covered by or related to the intellectual property rights of these companies and inviting us to discuss or demanding licensing or royalty arrangements for the use of the technology or seeking payment for damages, injunctive relief and other available legal remedies through litigation. These companies also include third-party non-practicing entities (also known as patent trolls) that focus on extracting royalties and settlements by enforcing patent rights through litigation or the threat of litigation. These companies typically have little or no product revenues and therefore our patents could provide little or no deterrence against such companies filing patent infringement lawsuits against us. In addition, third parties have initiated and could continue to initiate litigation against our manufacturers, suppliers, distributors or even our customers alleging infringement or misappropriation of their proprietary rights with respect to existing or future products, or components of our products. For example, various proceedings were commenced against Broadcom Inc. (“Broadcom”), a manufacturer of products for the wireless and broadband communications industry, and other parties alleging patent infringement in various jurisdictions, and in some cases the courts issued rulings adverse to Broadcom enjoining Broadcom from offering, distributing, using or importing products that include the challenged intellectual property. In February 2020, a federal jury found that Broadcom, among others, must pay $1.1 billion to the California Institute of Technology for infringing upon patents. Although we are not party to these proceedings, adverse rulings or injunctive relief awarded against Broadcom or other key suppliers of components for our products could result in delays or stoppages in the shipment of affected components, or require us to recall,

modify or redesign our products containing such components. Regardless of the merit of claims against us or our manufacturers, suppliers, distributors or customers, intellectual property litigation can be time consuming and costly, and result in the diversion of the attention of technical and management personnel. Any such litigation could force us to stop manufacturing, selling, distributing, exporting, incorporating or using products or components that include the challenged intellectual property, or to recall, modify or redesign such products. In addition, if a party accuses us of infringing upon its proprietary rights, we may have to enter into royalty or licensing agreements, which may not be available on terms acceptable to us, if at all. If we are unsuccessful in any such litigation, we could be subject to significant liability for damages and loss of our proprietary rights. Any of these events or results could have a material adverse effect on our business, operations, financial condition and liquidity.

Our collection, processing, storage, use, and transmission of personal data could give rise to liabilities as a result of governmental regulation, increasing legal requirements.

We collect, process, store, use, and transmit personal data on a daily basis. Personal data is increasingly subject to legal and regulatory protections around the world, which vary widely in approach and which possibly conflict with one another. In recent years, for example, U.S. legislators and regulatory agencies, such as the Federal Trade Commission, as well as U.S. states have increased their focus on protecting personal data by law and regulation and have increased enforcement actions for violations of privacy and data protection requirements. The European Commission also recently approved and adopted the General Data Protection Regulation (GDPR), a recent data protection law, which became effective in May 2018. These data protection laws and regulations are intended to protect the privacy and security of personal data that is collected, processed, and transmitted in or from the relevant jurisdiction. The GDPR established new requirements applicable to the processing of personal data, affords new data protection rights to individuals and imposes significant penalties for data breaches. Individuals also have a right to compensation under the GDPR for financial or non-financial losses. Implementation of and compliance with these laws and regulations may be more costly or take longer than we anticipate, or could otherwise adversely affect our business operations, which could negatively impact our financial position or cash flows. Any failure to comply with applicable regulations could also result in regulatory enforcement actions against us, subject us to negative publicity and significant penalties and ultimately cause an adverse effect on our business.

If we experience a significant disruption in, or breach in security of, our information technology systems, our business could be adversely affected.

We rely on several centralized information technology systems to provide products and services, maintain financial records, process orders, manage inventory, process shipments to customers and operate other critical functions. If we experience a prolonged system disruption in the information technology systems that involve our interactions with customers or suppliers, it could result in the loss of sales and customers and significant incremental costs, which could adversely affect our business. In addition, our information technology systems could be susceptible to damage, disruptions or shutdowns due to power outages, hardware failures, computer viruses, attacks by computer hackers, telecommunication failures, user errors, catastrophes or other unforeseen events. Furthermore, security breaches of our information technology systems could result in the misappropriation or unauthorized disclosure of confidential information belonging to the company or our employees, partners, customers or suppliers, which could result in significant financial, legal or reputational damage to the Company. In response to the COVID-19 pandemic, a large portion of our workforce is working remotely, and such remote working could exacerbate any of the foregoing risks.

Compliance or the failure to comply with current and future environmental regulations could cause us significant expense.

We are subject to a variety of federal, state, local and foreign environmental regulations. If we fail to comply with any present or future regulations, we could be subject to liabilities, the suspension of production or prohibitions on the sale of our products. In addition, such regulations could require us to incur other significant expenses to comply with environmental regulations, including expenses associated with the redesign of any non-compliant product. From time to time new regulations are enacted, and it is difficult to anticipate how such regulations will be implemented and enforced and the impact that they could have on our operations or results. For example, in 2003 the European Union enacted the Restriction on the Use of Certain Hazardous Substances in Electrical and Electronic Equipment Directive and the Waste Electrical and Electronic Equipment Directive, for implementation in European Union member states. We are aware of similar legislation that is currently in force or has been considered in the U.S., as well as other countries, such as Japan and China. Implementation of and compliance with these laws may be costly or could otherwise adversely affect our business operations, which could negatively impact our financial position or cash flows. Our failure to comply with any such regulatory requirements or contractual obligations could result in us being liable for costs, fines, penalties or third-party claims, and could jeopardize our ability to conduct business in countries or jurisdictions where such regulations apply.

Failure to comply with the U.S. Foreign Corrupt Practices Act and similar laws associated with our international activities could subject us to significant civil or criminal penalties.

Failure to comply with the Foreign Corrupt Practices Act could subject us to significant civil or criminal penalties. A significant portion of our revenues is generated from sales outside of the United States. As a result, we are subject to the U.S. Foreign Corrupt Practices Act (the “FCPA”). The FCPA generally prohibits U.S. companies and their intermediaries from making corrupt payments to foreign officials for the purpose of obtaining or keeping business or otherwise obtaining favorable treatment and requires companies to maintain adequate record-keeping and internal accounting practices to accurately reflect the transactions of the company. The FCPA applies to companies, individual directors, officers, employees and agents. Under the FCPA, U.S. companies may be held liable for the corrupt actions taken by employees, strategic or local partners or other representatives. If we or our intermediaries fail to comply with the requirements of the FCPA or similar legislation, governmental authorities in the U.S. and elsewhere could seek to impose civil and/or criminal fines and penalties which could have an adverse effect on our results of operations, financial condition and cash flow.

Our business and future operating results are subject to global economic and market conditions.

Market turbulence and weak economic conditions, including those caused by the COVID-19 pandemic, as well as concerns about energy costs, geopolitical issues, the availability and cost of credit, business and consumer confidence, and unemployment could impact our business in a number of ways, including:

Potential deferment of purchases and orders by customers: Uncertainty about global economic conditions could cause consumers, businesses and governments to defer purchases in response to flat revenue budgets, tighter credit, decreased cash availability and weak consumer confidence. Accordingly, future demand for our products could differ materially from our current expectations.

Customers’ inability to obtain financing to make purchases and/or maintain their business: Some of our customers require substantial financing in order to finance their business operations, including capital expenditures on new equipment and equipment upgrades, and make purchases from us. The potential inability of these customers to access the capital needed to finance purchases of our products and meet their payment obligations to us could adversely impact our business, operations, financial condition, and liquidity. While we monitor these situations carefully and attempt to take appropriate measures to protect ourselves, including factoring credit arrangements to financial institutions, it is possible that we may have to defer revenue until cash is collected or write-down or write-off uncollectible accounts. Such write-downs or write-offs, if large, could have a material adverse effect on our business, operations, financial condition, and liquidity. If our customers become insolvent due to market and economic conditions or otherwise, it could have a material adverse effect on our business, operations, financial condition and liquidity.

Negative impact from increased financial pressures on third-party dealers, distributors and retailers: We make sales in certain regions through third-party dealers, distributors and retailers. These third parties may be impacted, among other things, by a significant decrease in available credit. If credit pressures or other financial difficulties result in insolvency for these third parties and we are unable to successfully transition end customers to purchase our products from other third parties, or from us directly, it could adversely impact our business, operations, financial condition and liquidity.

Negative impact from increased financial pressures on key suppliers: Our ability to meet customers’ demands depends, in part, on our ability to obtain timely and adequate delivery of quality materials, parts and components from our suppliers. Certain of our components are available only from a single source or limited sources. If certain key suppliers were to become capacity constrained or insolvent, it could result in a reduction or interruption in supplies or a significant increase in the price of supplies and adversely impact our financial condition and results of operations. ~~Until~~In addition, credit constraints of key suppliers could result in accelerated payment of accounts payable by us, impacting our cash flow.

We may experience material adverse impacts on our business, operations, financial condition, and liquidity as a result of weak or recessionary economic or market conditions in the United States, Korea, Germany, or the rest of the world.

Due to the international nature of our business, political or economic changes or other factors in a specific country or region could harm our future revenue, costs and expenses and financial condition.

We currently have significant operations in India, Korea, and Vietnam, as well as sales and technical support teams in various locations around the world. We continue to consider opportunities to expand our international operations in the future. The successful management and expansion of our international operations requires significant human effort and the commitment of substantial financial resources. Further, our international operations may be subject to certain risks, disruptions and challenges that could materially harm our business, operations, financial condition, and liquidity, inclu ding:

In addition, some of our customer purchase agreements are governed by foreign laws and regulations, which may differ significantly from the laws and regulations of the United States. We may be limited in our ability to enforce our rights under these agreements and to collect damages, if awarded. Any of these factors could harm our existing international operations and business or impair our ability to continue expanding into international markets.

We conduct significant business in Korea, Japan, India, Vietnam, Europe, Middle East and Latin America, all of which subject us to foreign currency exchange rate risk.

We have in the past and may in the future undertake a hedging program to mitigate the impact of foreign currency exchange rate fluctuations. The use of such hedging activities may not offset any or more than a portion of the adverse financial effects of unfavorable movements in foreign currency exchange rates over the limited time the hedges are in place. Moreover, the use of hedging instruments may introduce additional risks if we are unable to structure effective hedges with such instruments, which could adversely affect our business, operations, financial condition, and liquidity. As such, our results of operations and our cash flows could be impacted by changes in foreign currency exchange rates.

Natural disasters, public health crises, political crises, and other catastrophic events or other events outside of our control may damage our facilities or the facilities of third parties on which we depend, and could materially impact our supply chain and the operations of our customers and suppliers.

Our global headquarters are located in California near major geologic faults that have experienced earthquakes in the past. An earthquake or other natural disaster or power shortages or outages could disrupt operations or impair critical systems. Any of these disruptions or other events outside of our control could affect our business negatively, harming our operating results. In addition, in the event any of our facilities or the facilities of our suppliers, contract manufacturers, third-party service providers, or customers, is affected by natural disasters, such as earthquakes, tsunamis, power shortages or outages, floods or monsoons, public health crises, such as pandemics and epidemics, including the ongoing COVID-19 pandemic to the extent not already occurring, political crises, such as terrorism, war, political instability or other conflict, or other events outside of our control, our business and operating results could suffer. Disasters occurring at our or our vendors’ facilities also could impact our reputation.

The telecommunications networking business requires the application of complex revenue and expense recognition rules and the regulatory environment affecting generally accepted accounting principles is uncertain. Changes in financial accounting standards or practices may cause adverse, unexpected financial reporting fluctuations and harm our business.

The nature of our business requires the application of complex revenue and expense recognition rules and the current regulatory environment affecting U.S. GAAP is uncertain. Significant changes in U.S. GAAP could affect our financial statements going forward and may cause adverse, unexpected financial reporting fluctuations and harm our operating results. U.S. GAAP is subject to interpretation by the Financial Accounting Standards Board, the Securities and Exchange Commission (SEC) and various bodies formed to promulgate and interpret appropriate accounting principles. In addition, we have in the past and may in the future need to significantly change our customer contracts, accounting systems and processes when we adopt future or proposed changes in accounting principles. The cost and effect of these changes may negatively impact our results of operations during the periods of transition.

Changes in government regulations related to our business could harm our operations, financial condition, and liquidity.

Our operations are subject to various laws and regulations, including those regulations promulgated by the Federal Communications Commission (“FCC”). The FCC has jurisdiction over the entire communications industry in the United States and, as a result, our existing and future products and our customers’ products are subject to FCC rules and regulations. Changes to current FCC rules and regulations and future FCC rules and regulations could negatively affect our business. Non-compliance with the FCC’s rules and regulations would expose us to potential enforcement actions, including monetary forfeitures, and could damage our reputation among potential customers. The uncertainty associated with future FCC decisions may cause network service providers to delay decisions regarding their capital expenditures for equipment for broadband services. In addition, international regulatory bodies establish standards that may govern our products in foreign markets. The SEC has adopted disclosure rules regarding the use of “conflict minerals” mined from the Democratic Republic of Congo and adjoining countries and procedures regarding a manufacturer’s efforts to prevent the sourcing of such conflict minerals. These rules may have the effect of reducing the pool of suppliers who can supply “conflict free” components and parts, and we may not be able to obtain “conflict free” products or supplies in sufficient quantities for our operations. Also, we may face reputational challenges with our customers, stockholders and other stakeholders if we are unable to sufficiently verify the origins for the conflict minerals used in our products. In addition, governments and regulators in many jurisdictions have implemented or are evaluating regulations relating to cyber security, privacy and data protection, which can affect the markets and requirements for networking and communications equipment. We are unable to predict the scope, pace or financial impact of government regulations and other policy changes that could be adopted in the future, any of which could negatively impact our operations and costs of doing business. Because of our smaller size, legislation or governmental regulations can significantly increase our costs and affect our competitive position. Changes to or future domestic and international regulatory requirements could result in postponements or cancellations of customer orders for our products and services, which could harm our business, operations, financial condition and liquidity. Further, we cannot be certain that we will be successful in obtaining or maintaining regulatory approvals that could, in the future, be required to operate our business.

Industry consolidation may lead to increased competition and could harm our operating results.

There has been a trend toward industry consolidation in the communications equipment market for several years. We expect this trend to continue as companies attempt to strengthen or hold their market positions in an evolving industry and as companies are acquired or are unable to continue operations. We believe that industry consolidation may result in stronger competitors that are better able to compete as sole-source vendors for customers. This could have a material adverse effect on our business, operations, financial condition, and liquidity. Furthermore, rapid consolidation could result in a decrease in the number of customers we serve. The loss of a major customer could have a material adverse effect on our business, operations, financial condition, and liquidity.

DNI owns a significant amount of our outstanding common stock and has the ability to exert significant influence or control over any matters that require stockholder approval, including the election of directors and the approval of certain transactions, and DNI’s interests may conflict with our interests and the interests of other stockholders.

As of March 31, 2020, DNI owned approximately 44.1% of the outstanding shares of our common stock, representing a significant amount of the votes entitled to be cast by the holders of our outstanding common stock at a stockholder meeting. Due to its significant ownership percentage of our common stock, DNI has the ability to substantially influence or control the outcome of any matter submitted for the vote of our stockholders, including the election of directors and the approval of certain transactions. The interests of DNI may conflict with the interests of our other stockholders or with holders of our indebtedness and may cause us to take actions that our other stockholders or holders of our indebtedness do not view as beneficial.

DNI’s large concentration of stock ownership may make it more difficult for a third party to acquire us or discourage a third party from seeking to acquire us. Any potential third-party acquirer would most likely need to negotiate any such transaction with DNI, and the interests of DNI with respect to such transaction may be different from the interests of our other stockholders or with holders of our indebtedness.

Additionally, two of the Company’s directors serve as executive officers of DNI – Min Woo Nam is the Chief ~~Financial~~Executive Officer and Chairman of the Board of Directors of DNI and Choon Yul Yoo is the Chief Operating Officer of DNI. Messrs. Nam and Yoo owe fiduciary duties to us and, in addition, have duties to DNI. As a result, these directors may face real or apparent conflicts of interest with respect to matters affecting both us and DNI.

Our amended and restated bylaws (the “Bylaws”) provide that the Court of Chancery of the State of Delaware is the sole and exclusive forum for:

These exclusive forum provisions may limit a stockholder’s ability to bring a claim in a judicial forum that it finds favorable for disputes with us or our directors, officers, or other employees, which may discourage lawsuits against us and our directors, officers and other employees. The Supreme Court of the State of Delaware recently determined that the exclusive forum provision of federal district courts of the United States for resolving any complaint asserting a cause of action arising under the Securities Act is enforceable.

The limitation of liability and indemnification provisions could harm our stockholders’ investments and discourage them from suing our directors for breach of their fiduciary duties.

The limitation of liability and indemnification provisions in our Certificate of Incorporation, as restated, may discourage stockholders from bringing a lawsuit against directors for breach of their fiduciary duties. They may also reduce the likelihood of derivative litigation against directors and officers, even though an action, if successful, might benefit us and our stockholders. A stockholder’s investment may be harmed to the extent we pay the costs of settlement and damage awards against directors and officers pursuant to these indemnification provisions. Insofar as indemnification for liabilities under the Securities Act may be permitted to directors, officers or persons controlling us pursuant to the foregoing provisions, we have been informed that in the opinion of the SEC such indemnification is against public policy as expressed in the Securities Act and is therefore unenforceable. There is no pending litigation or proceeding naming any of our directors or officers as to which indemnification is being sought, nor are we aware of any pending or threatened litigation that may result in claims for indemnification by any director or officer.

There is a limited public market for our common stock. The average daily trading volume in our common stock during the 3 months ended March 31, 2020 was approximately 67,000 shares per day. We cannot provide assurances that a more active trading market will develop or be sustained. As a result of low trading volume in our common stock, the purchase or sale of a relatively small number of shares of our common stock could result in significant price fluctuations and it may be difficult for holders to sell their shares without depressing the market price of our common stock.

DNI, our largest stockholder, owned 9.5 million shares of our common stock as of March 31, 2020 and has the right to require us to register, from time to time, the resale of those shares with the SEC. If DNI were to exercise its registration rights, its shares would become eligible for resale upon registration without restriction as to volume limitations. Our stock price could suffer a significant decline as a result of any sudden increase in the number of shares sold in the public market or market perception that the increased number of shares available for sale will exceed the demand for our common stock.

We do not expect to declare or pay dividends in the foreseeable future, as we anticipate that we will invest future earnings in the development and growth of our business. Therefore, holders of our common stock will not receive any return on their investment unless they sell their securities, and holders may be unable to ~~successfully manage and grow our business, and our results~~sell their securities on favorable terms or at all.

Future issuances of ~~operations, internal controls and financial condition~~additional equity securities could ~~suffer~~result in dilution of existing stockholders’ equity ownership.

We may determine from time to time to issue additional equity securities to raise additional capital, support growth, or, as ~~a result. Leadership transitions can be inherently difficult~~we have in recent years, to ~~manage and~~make acquisitions. Further, we may ~~cause uncertainty and decreased productivity among~~issue stock options, grant restricted stock awards or other equity awards to retain, compensate and/or motivate our employees and ~~increase the likelihood of turnover, which could result in significant disruptions to our operations. We could be adversely affected if we fail to adequately plan for the succession of members~~directors. These issuances of our ~~senior management team should we have additional departures. Finally, we continue to execute a number~~securities could dilute the voting and economic interests of ~~significant business initiatives. Successfully managing these initiatives, including retention of key employees, is critical to our business success.~~

As noted above, at September 30, 2019, the Company was not in compliance with the maximum leverage ratio financial covenant in the Credit Agreements, which represents an event of default thereunder. On November 8, 2019, the Company obtained a waiver of the foregoing event of default from the lenders under the Credit Agreements (the “Waiver”). As a condition for the issuance of the Waiver, the Company voluntarily prepaid $10.0 million of the outstanding term loan and paid a one-time fee of $150,000. The foregoing description of the Waiver is qualified in its entirety by reference to the Waiver, a copy of which is filed as Exhibit 10.3 hereto.

The exhibits required to be filed with this quarterly report on Form 10-Q are listed in the Exhibit Index attached hereto and are incorporated herein by reference.

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

Delaware		22-3509099
(State or other jurisdiction of incorporation or organization)		(I.R.S. Employer Identification Number)

~~7195 Oakport Street~~1350 South Loop Road, Suite 130 ~~Oakland,~~Alameda, California		~~94621~~94502
(Address of principal executive offices)		(Zip code)

Title of each class	Trading Symbol(s)	Name of each exchange on which registered

Common stock, $0.001 par value	DZSI	The Nasdaq Stock Market LLC

Large accelerated filer	☐	Accelerated filer	☐☒
Non-accelerated filer	☒☐	Smaller reporting company	☒
		Emerging growth company	☐

		Page
PART I. FINANCIAL INFORMATION

Item 1.	Financial Statements	3
	Unaudited Condensed Consolidated Balance Sheets	3
	Unaudited Condensed Consolidated Statements of Comprehensive ~~Income (Loss)~~Loss	4
	Unaudited Condensed Consolidated Statements of Stockholders' Equity and Non-Controlling Interest	5
	Unaudited Condensed Consolidated Statements of Cash Flows	6
	Notes to Unaudited Condensed Consolidated Financial Statements	7
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	2823
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	3732
Item 4.	Controls and Procedures	3832

PART II. OTHER INFORMATION

Item 1.	Legal Proceedings	3933
Item 1A.	Risk Factors	3933
Item 5.	Other Information	4050
Item 6.	Exhibits	4050
	Signatures	4252

	Three Months Ended				Nine Months Ended				Three Months Ended
	September 30,				September 30,				March 31,
	2019		2018		2019		2018		2020		2019
Revenue by geography:
United States	$	9,662	$	11,125	$	28,993	$	41,373	$	7,598	$	9,578
Canada		1,062		1,131		2,950		3,344		767		923
Total North America		10,724		12,256		31,943		44,717		8,365		10,501
Latin America		6,273		6,841		18,829		21,713		2,241		6,585
Europe, Middle East, Africa		15,838		10,425		59,429		27,264		12,447		18,414
Korea		20,877		19,609		55,682		50,844		9,624		15,851
Other Asia Pacific		17,812		22,783		63,394		63,137		14,803		22,738
Total International		60,800		59,658		197,334		162,958		39,115		63,588
Total	$	71,524	$	71,914	$	229,277	$	207,675	$	47,480	$	74,089

	Contract Assets			Contract Liabilities
Opening, January 1, 2019	$	12,175		$	10,312
Closing, September 30, 2019		10,328			6,206
Decrease	$	(1,847	)	$	(4,106	)

	Contract Assets			Contract Liabilities
December 31, 2019	$	16,680		$	6,797
March 31, 2020		3,128			6,457
Decrease	$	(13,552	)	$	(340	)

Purchase consideration
Cash consideration	$	11,776
Working capital adjustment: cash received from lockbox mechanism		(2,497	)
Adjusted purchase consideration	$	9,279

Allocation of purchase consideration
Current assets
Cash and cash equivalents	$	4,582
Accounts receivable - trade, net		6,820
Other receivables		798
Inventories		9,943
Property, plant and equipment		983
Other assets		163
Intangible assets		12,030
Accounts payable - trade		(3,303	)
Short-term debt		(4,582	)
Contract liabilities		(364	)
Accrued liabilities		(3,614	)
Deferred tax liabilities		(1,071	)
Pension obligations		(12,656	)
Other long term liabilities		(116	)
Bargain purchase gain		(334	)
Total purchase consideration	$	9,279

	Estimated Fair Value (in thousands)		Estimated Useful Life
Intangible assets acquired
Customer relationships	$	3,667	5 years
Trade name		3,208	5 years
Technology - developed core		5,155	5 years
Total intangible assets	$	12,030

	Three Months Ended		Nine Months Ended
	September 30, 2018		September 30, 2018
Pro forma net revenues	$	84,870	$	242,086
Pro forma net income attributable to DASAN Zhone Solutions, Inc.		726		2,885

	September 30, 2019			December 31, 2018
Gross accounts receivable	$	101,253		$	71,945
Less: allowance for doubtful accounts		(388	)		(328	)
Total accounts receivable, net	$	100,865		$	71,617

	September 30, 2019							March 31, 2020
	Gross Carrying Amount		Accumulated Amortization			Net		Gross Carrying Amount		Accumulated Amortization			Net
Developed technology	$	7,972	$	(2,624	)	$	5,348	$	7,900	$	(3,335	)	$	4,565
Customer relationships		8,733		(2,140	)		6,593		8,727		(2,642	)		6,085
Trade name		3,056		(458	)		2,598		1,320		(506	)		814
Total intangible assets, net	$	19,761	$	(5,222	)	$	14,539	$	17,947	$	(6,483	)	$	11,464

	December 31, 2018							December 31, 2019
	Gross Carrying Amount		Accumulated Amortization			Net		Gross Carrying Amount		Accumulated Amortization			Net
Developed technology	$	3,060	$	(1,428	)	$	1,632	$	7,994	$	(3,027	)	$	4,967
Customer relationships		5,240		(1,223	)		4,017		8,795		(2,458	)		6,337
Trade name									1,346		(269	)		1,077
Total intangible assets, net	$	8,300	$	(2,651	)	$	5,649	$	18,135	$	(5,754	)	$	12,381


Remainder of 2019	$	857
2020		3,429
Remainder of 2020			$	2,299
2021		3,225		2,862
2022		2,816		2,454
2023		2,816		2,454
2014				524
Thereafter		1,396		871
Total	$	14,539	$	11,464

Weighted average remaining life:
Developed technology	3.74 years		3.7 years
Customer relationships	5.72 years		5.7 years
Trade name	4.25 years		4.3 years

	As of September 30, 2019
	Short-term			Long-term			Total
PNC Bank Facility	$	12,500		$	11,250		$	23,750
Working Capital Loan		2,183			—			2,183
Bank and Trade Facilities - Foreign Operations		20,625			—			20,625
Related Party		—			9,049			9,049
	$	35,308		$	20,299		$	55,607
Less: unamortized deferred financing costs on the PNC Bank Facility		(702	)		(843	)		(1,545	)
	$	34,606		$	19,456		$	54,062

	As of December 31, 2018						December 31, 2019
	Short-term		Long-term		Total		Short-term			Long-term			Total
Wells Fargo Bank Facility	$	7,000		—	$	7,000
PNC Credit Facilities							$	2,500		$	10,625		$	13,125
Bank and Trade Facilities - Foreign Operations		24,762		—		24,762		15,779			—			15,779
Related Party		—		14,142		14,142		—			9,096			9,096
	$	31,762	$	14,142	$	45,904	$	18,279		$	19,721		$	38,000
Less: unamortized deferred financing costs on the PNC Credit Facilities								(795	)		(688	)		(1,483	)
							$	17,484		$	19,033		$	36,517

Year ended December 31, 2020	$	12,323
2021		—
2022		27,348
2023		—
2024		—
Thereafter		—
Total	$	39,671

	~~September 30,~~ ~~2019~~
~~Discount rate~~	~~1.20%~~
~~Rate of pension increase~~	~~1.70%~~
~~Retirement age~~	~~63-67 years~~

	Nine Months Ended September 30,
	2019			2018
Beginning non-controlling interests	$	615		$	534
Net income (loss) attributable to non-controlling interests		194			2
Purchase of noncontrolling interest in subsidiary		(823	)		—
Foreign currency translation adjustments (OCI)		14			(5	)
Ending non-controlling interests	$	—		$	531

Periodic benefit costs were as follows (in thousands):
	March 31, 2020		March 31, 2019
Interest costs	$	38	$	100
Net amortization costs		5		—
Period costs	$	43	$	100

	March 31, 2020	December 31, 2019
Discount rate	1.5%	0.9%
Rate of pension increase	1.7%	1.7%

	Three Months Ended March 31,
	2019
Beginning non-controlling interests	$	615
Net income (loss) attributable to non-controlling interests		181
Foreign currency translation adjustments (OCI)		(1	)
Ending non-controlling interests	$	795

		Three Months Ended September 30, 2019
Counterparty	DNI ownership interest	Sales		Cost of revenue		Manufacturing (cost of revenue)		Research and product development		Selling, marketing, general and administrative		Interest expense		Other expenses
DNI	N/A	$	232	$	190	$	—	$	—	$	966	$	104	$	84
Tomato Soft Ltd.	100%		—		—		29		—		—		—		—
Tomato Soft (Xi'an) Ltd.	100%		—		—		—		137		—		—		—
Chasan Networks Co., Ltd.	100%		—		—		279		16		—		—		—
		$	232	$	190	$	308	$	153	$	966	$	104	$	84

		Three Months Ended September 30, 2018
Counterparty	DNI ownership interest	Sales		Cost of revenue		Manufacturing (cost of revenue)		Research and product development		Selling, marketing, general and administrative		Interest expense		Other expenses
DNI	N/A	$	1,472	$	1,270	$	—	$	—	$	784	$	112	$	89
Tomato Soft Ltd.	100%		—		—		27		—		—		—		—
Tomato Soft (Xi'an) Ltd.	100%		—		—		—		119		—		—		—
Chasan Networks Co., Ltd.	100%		—		—		260		21		—		—		—
HANDYSOFT, Inc.	17.63%		215		208		—		—		2		—		—
		$	1,687	$	1,478	$	287	$	140	$	786	$	112	$	89

		Three Months Ended March 31, 2020
Counterparty	DNI ownership interest	Sales		Cost of revenue		Manufacturing (cost of revenue)*		Research and product development		Selling, marketing, general and administrative		Interest expense		Other expenses
DNI	N/A	$	162	$	133	$	—	$	—	$	571	$	151	$	86
DASAN Ventures	33%		—		—		8		33		38		—		—
		$	162	$	133	$	8	$	33	$	609	$	151	$	86

		As of March 31.2020
Counterparty	DNI ownership interest	Account receivables		Other receivables		Deposits for lease *		Long- term debt		Accounts payable		Other payables		Accrued and other liabilities
DNI	N/A	$	28	$	30	$	672	$	27,348	$	180	$	57	$	118
DASAN Ventures	33%		—		—		—		—		—		28		—
		$	28	$	30	$	672	$	27,348	$	180	$	85	$	118

	Three Months Ended September 30,					Nine Months Ended September 30,					Three Months Ended March 31,
	2019			2018		2019			2018		2020			2019
Net income (loss) attributable to DASAN Zhone Solutions, Inc.	$	(4,033	)	$	1,798	$	(3,263	)	$	3,321
Net loss attributable to DASAN Zhone Solutions, Inc.											$	(8,771	)	$	(1,638	)
Weighted average number of shares outstanding:
Basic		21,384			16,683		18,732			16,425		21,474			16,593
Effect of dilutive securities:
Stock options, restricted stock units and share awards		—			208		—			215		—			—
Diluted		21,384			16,891		18,732			16,640		21,474			16,593
Net income (loss) per share attributable to DASAN Zhone Solutions, Inc.:
Net loss per share attributable to DASAN Zhone Solutions, Inc.:
Basic	$	(0.19	)	$	0.11	$	(0.17	)	$	0.20	$	(0.41	)	$	(0.10	)
Diluted	$	(0.19	)	$	0.11	$	(0.17	)	$	0.20	$	(0.41	)	$	(0.10	)

	Three Months Ended September 30, 2019 (in thousands)		Nine Months Ended September 30, 2019 (in thousands)		March 31, 2020		March 31, 2019
Operating lease cost	$	1,064	$	3,327	$	1,410	$	1,123
Variable lease cost		194		520		158		164
Short-term lease cost						36		101
Total net lease cost	$	1,258	$	3,847	$	1,604	$	1,388

Lease Assets and Liabilities
Assets:
Right-of-use assets from operating leases	$	18,349

Liabilities:
Operating lease liabilities - current	$	3,496
Operating lease liabilities - non-current		15,957
Total operating lease liabilities	$	19,453

Weighted average remaining lease term	4.77 years
Weighted average discount rate		6.6	%

	Operating Leases
Year ending December 31:
2019	$	4,100
2020		3,005
2021		2,590
2022		2,664
2023		2,494
Thereafter		5,929
Total minimum lease payments	$	20,782

Guarantor	Amount Guaranteed (in thousands)		Description of Obligations Guaranteed	Amount Guaranteed (in thousands)		Description of Obligations Guaranteed
DNI	$	8,400	Credit facility from Industrial Bank of Korea	$	8,400	Credit facility from Industrial Bank of Korea
DNI		1,998	Purchasing Card from Industrial Bank of Korea		1,963	Purchasing Card from Industrial Bank of Korea
DNI		8,400	Credit facility from Korea Development Bank		8,400	Credit facility from Korea Development Bank
DNI		4,995	Borrowings from Korea Development Bank		4,908	Borrowings from Korea Development Bank
DNI		6,000	Credit facility from NongHyup Bank		6,000	Credit facility from NongHyup Bank
DNI		3,566	Borrowings from Export-Import Bank of Korea		3,504	Borrowings from Export-Import Bank of Korea
DNI		3,000	Payment Guarantee from Shinhan Bank		3,000	Payment Guarantee from Shinhan Bank
DNI		1,598	Backed Loan from Shinhan Bank		1,570	Backed Loan from Shinhan Bank
PNC Bank, N.A.		4,550	Letter of Credit		4,859	Collateral for Standby Letter of Credit
Seoul Guarantee Insurance Co.		5,516	Performance Bond, Warranty Bond, etc. (*)		5,690	Performance Bond, Warranty Bond, etc. (*)
Industrial Bank of Korea		1,096	Letter of Credit		508	Bank Guarantee
Industrial Bank of Korea		1,010	Bank Guarantee
Korea Development Bank		6,908	Letter of Credit		2,105	Letter of Credit
NongHyup Bank		3,596	Letter of Credit		765	Letter of Credit
Woori Bank		1,932	Bank Guarantee		968	Bank Guarantee
Shinhan Bank		573	Purchasing Card		266	Purchasing Card
Shinhan Bank		683	Payment Guarantee		685	Payment Guarantee
AXA Insurance Company		175	Guarantee for flexible retirement program
Polska Agencja Zeglugi Powietrznej		112	Performance Bond, Warranty Bond, etc. (*)
DDE 64 Ltd.		64	Guarantee Bond
Citibank					291	Collateral for Standby Letter of Credit
	$	64,172		$	53,882

Exhibit Number		Description

2.1		Share Transfer Agreement dated as of July 31, 2019 by and between Handysoft, Inc. and DASAN Zhone Solutions, Inc. (incorporated by reference to Exhibit 2.1 to the Company’s Current Report on Form 8-K filed with the SEC on August 5, 2019).

~~10.1+~~10.1		~~General Release of Claims and Consulting~~Loan Agreement dated ~~August 30, 2019~~March 3, 2020 and entered into as of March 4, 2020 by and between DASAN ~~Zhone~~Networks, Inc. and DASAN Network Solutions, Inc. ~~and Michael Golomb.~~(Korea) (incorporated by reference to Exhibit 10.1 to the Company’s Current Report on Form 8-K filed with the SEC on March 10, 2020).

10.2		~~Office Lease~~Intellectual Property Pledge Agreement dated ~~July 9, 2019,~~March 3, 2020 and entered into as of March 4, 2020 by and between DASAN ~~Zhone~~Networks, Inc. and DASAN Network Solutions, Inc. ~~and Family Stations, Inc.~~(Korea) (incorporated by reference to Exhibit ~~10.3~~10.2 to the Company’s ~~Quarterly~~Current Report on Form ~~10-Q~~8-K filed with the SEC on ~~August 14, 2019)~~March 10, 2020).

10.3		~~Letter~~Share Pledge Agreement dated ~~November 8, 2019~~March 3, 2020 and entered into as of March 4, 2020 by and among ~~PNC Bank, N.A.~~DASAN Networks, Inc., ~~Citibank, N.A.~~DASAN Network Solutions, Inc. (Korea) and DASAN Network Solutions, Inc. (California) (incorporated by reference to Exhibit 10.3 to the Company’s Current Report on Form 8-K filed with the SEC on March 10, 2020).

10.4		Agreement of Sublease dated February 24, 2020 by and between Huawei Technologies USA, Inc. and Dasan Zhone Solutions, Inc. (incorporated by reference to Exhibit 10.1 to the Company’s Current Report on Form 8-K filed with the SEC on March 2, 2020).

10.5		Agreement of Sublease dated February 24, 2020 by and between Futurewei Technologies, Inc. and Dasan Zhone Solutions, Inc. (incorporated by reference to Exhibit 10.2 to the Company’s Current Report on Form 8-K filed with the SEC on March 2, 2020).

31.1		Certification of Chief Executive Officer Pursuant to Rule 13a-14(a)/15d-14(a)

31.2		Certification of Chief Financial Officer Pursuant to Rule 13a-14(a)/15d-14(a)

32.1		Section 1350 Certification of Chief Executive Officer and Chief Financial Officer

~~101.INS~~		~~XBRL Instance Document~~

101.SCH		XBRL Taxonomy Extension Schema

101.CAL		XBRL Taxonomy Extension Calculation Linkbase

101.DEF		XBRL Taxonomy Extension Definition Linkbase

101.LAB		XBRL Taxonomy Extension Labels Linkbase

101.PRE		XBRL Taxonomy Extension Presentation Linkbase

	DASAN ZHONE SOLUTIONS, INC.

Date: ~~November 13, 2019~~May 11, 2020
	By:	/s/ IL YUNG KIM
	Name:	Il Yung Kim
	Title:	President and Chief Executive Officer

	By:	/s/ ~~IL YUNG KIM~~THOMAS J. CANCRO
	Name:	~~Il Yung Kim~~Thomas J. Cancro
	Title:	~~Interim~~ Chief Financial Officer and Treasurer
		(Principal Financial and
		Accounting Officer)