Avid Technology (AVID) 10-Q 7 Nov 19 2019 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2019	Nov. 04, 2019
Document Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Transition Report	false
Amendment Flag	false
Document Period End Date	Sep. 30, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q3
Entity File Number	1-36254
Current Fiscal Year End Date	--12-31
Entity Registrant Name	Avid Technology, Inc.
Entity Address, Address Line One	75 Network Drive
Entity Address, City or Town	Burlington
Entity Address, State or Province	MA
Entity Address, Postal Zip Code	01803
Entity Central Index Key	0000896841
State of Incorporation	DE
Entity Tax Identification Number	04-2977748
City Area Code	978
Local Phone Number	640-6789
Title of Security	Common Stock, $.01 par value
Trading Symbol	AVID
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Shell Company	false
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		43,049,179

CONSOLIDATED STATEMENTS OF OPER

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Net revenues:
Revenues	$ 93,461	$ 104,046	$ 295,481	$ 300,598
Cost of revenues:
Total cost of revenues	35,603	43,435	119,681	127,948
Gross profit	57,858	60,611	175,800	172,650
Operating expenses:
Research and development	14,860	15,873	46,325	47,543
Marketing and selling	22,334	23,461	73,341	77,352
General and administrative	12,034	13,660	38,543	41,656
Amortization of intangible assets	0	363	695	1,089
Restructuring costs, net	229	226	518	3,401
Total operating expenses	49,457	53,583	159,422	171,041
Operating income (loss)	8,401	7,028	16,378	1,609
Interest and other expense, net	(5,519)	(5,725)	(23,994)	(17,362)
Income (loss) before income taxes	2,882	1,303	(7,616)	(15,753)
Provision for (benefit from) income taxes	(283)	425	155	824
Net income (loss)	$ 3,165	$ 878	$ (7,771)	$ (16,577)
Net income (loss) per common share – basic and diluted	$ 0.07	$ 0.02	$ (0.18)	$ (0.40)
Weighted-average common shares outstanding – basic	42,913	41,792	42,510	41,596
Weighted-average common shares outstanding – diluted	43,674	42,226	42,510	41,596
Product [Member]
Net revenues:
Revenues	$ 42,911	$ 52,133	$ 147,633	$ 144,922
Cost of revenues:
Cost of revenues	23,877	27,042	79,535	79,684
Service [Member]
Net revenues:
Revenues	50,550	51,913	147,848	155,676
Cost of revenues:
Cost of revenues	11,726	14,443	36,408	42,414
Amortization of intangible assets [Member]
Cost of revenues:
Amortization of intangible assets	$ 0	$ 1,950	$ 3,738	$ 5,850

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Net income (loss)	$ 3,165	$ 878	$ (7,771)	$ (16,577)
Other comprehensive income (loss):
Foreign currency translation adjustments	(764)	86	(602)	(970)
Comprehensive income (loss)	$ 2,401	$ 964	$ (8,373)	$ (17,547)

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 52,289	$ 56,103
Restricted cash	1,664	8,500
Accounts receivable, net of allowances	53,718	67,754
Inventories	32,168	32,956
Prepaid expenses	13,140	8,853
Contract assets	14,418	16,513
Other current assets	6,559	5,917
Total current assets	173,956	196,596
Property and equipment, net	20,140	21,582
Intangible assets, net	0	4,432
Goodwill	32,643	32,643
Right of use assets	31,467	0
Long-term deferred tax assets, net	2,006	1,158
Other long-term assets	6,009	9,432
Total assets	266,221	265,843
Current liabilities:
Accounts payable	35,554	39,239
Accrued compensation and benefits	16,601	21,967
Accrued expenses and other current liabilities	36,531	37,547
Income taxes payable	2,170	1,853
Short-term debt	29,705	1,405
Deferred revenues	71,224	85,662
Total current liabilities	191,785	187,673
Long-term debt	199,593	220,590
Long-term deferred revenues	13,757	13,939
Long-term lease liabilities	28,930	0
Other long-term liabilities	5,081	10,302
Total liabilities	439,146	432,504
Commitments and Contingencies (Note 8)
Stockholders' deficit:
Common stock	429	423
Additional paid-in capital	1,025,796	1,028,924
Accumulated deficit	(1,194,781)	(1,187,010)
Treasury stock at cost	0	(5,231)
Accumulated other comprehensive loss	(4,369)	(3,767)
Total stockholders' deficit	(172,925)	(166,661)
Total liabilities and stockholders' deficit	$ 266,221	$ 265,843

CONSOLIDATED BALANCE SHEETS (PA

CONSOLIDATED BALANCE SHEETS (PARENTHETICAL) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Allowance for doubtful accounts	$ 598	$ 1,339

CONSOLDATED STATEMENTS OF STOCK

CONSOLDATED STATEMENTS OF STOCKHOLDERS' DEFICIT Statement - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]	AOCI Attributable to Parent [Member]
Balances at beginning of period at Dec. 31, 2017	$ (268,570)	$ 423	$ 1,035,808	$ (1,284,703)	$ (17,672)	$ (2,426)
Balances at beginning of period (in shares) at Dec. 31, 2017		42,339			(983)
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	(699)	$ 0	(11,655)	0	$ 10,956	0
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture		0			474
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	4,331		4,331
Net Income (Loss) Attributable to Parent	(16,577)			(16,577)
Other Comprehensive Income (Loss), Net of Tax	(970)					(970)
Adjustments to Additional Paid in Capital, Equity Component of Convertible Debt, Subsequent Adjustments	(23)		(23)
Capped Call Transaction Cost Reimbursement	6		6
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	108,367			108,367
Balances at end of period at Sep. 30, 2018	(174,135)	$ 423	1,028,467	(1,192,913)	$ (6,716)	(3,396)
Balances at end of period (in shares) at Sep. 30, 2018		42,339			(509)
Balances at beginning of period at Jun. 30, 2018	(176,874)	$ 423	1,028,334	(1,193,791)	$ (8,358)	(3,482)
Balances at beginning of period (in shares) at Jun. 30, 2018		42,339			(617)
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	(304)	$ 0	(1,946)	0	$ 1,642	0
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture		0			108
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	2,076		2,076
Net Income (Loss) Attributable to Parent	878			878
Other Comprehensive Income (Loss), Net of Tax	86					86
Adjustments to Additional Paid in Capital, Equity Component of Convertible Debt, Subsequent Adjustments	(1)		(1)
Capped Call Transaction Cost Reimbursement	4		4
Balances at end of period at Sep. 30, 2018	(174,135)	$ 423	1,028,467	(1,192,913)	$ (6,716)	(3,396)
Balances at end of period (in shares) at Sep. 30, 2018		42,339			(509)
Balances at beginning of period at Dec. 31, 2018	(166,661)	$ 423	1,028,924	(1,187,010)	$ (5,231)	(3,767)
Balances at beginning of period (in shares) at Dec. 31, 2018		42,339			(391)
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	(3,129)	$ 6	(8,366)	0	$ 5,231	0
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture		668			391
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	5,788		5,788
Net Income (Loss) Attributable to Parent	(7,771)			(7,771)
Other Comprehensive Income (Loss), Net of Tax	(602)					(602)
Adjustments to Additional Paid in Capital, Equity Component of Convertible Debt, Subsequent Adjustments	(577)		(577)
Capped Call Transaction Cost Reimbursement	27		27
Balances at end of period at Sep. 30, 2019	(172,925)	$ 429	1,025,796	(1,194,781)	$ 0	(4,369)
Balances at end of period (in shares) at Sep. 30, 2019		43,007			0
Balances at beginning of period at Jun. 30, 2019	(175,823)	$ 427	1,025,301	(1,197,946)	$ 0	(3,605)
Balances at beginning of period (in shares) at Jun. 30, 2019		42,720			0
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	(1,548)	$ 2	(1,550)	0	$ 0	0
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture		287			0
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	2,045		2,045
Net Income (Loss) Attributable to Parent	3,165			3,165
Other Comprehensive Income (Loss), Net of Tax	(764)					(764)
Balances at end of period at Sep. 30, 2019	$ (172,925)	$ 429	$ 1,025,796	$ (1,194,781)	$ 0	$ (4,369)
Balances at end of period (in shares) at Sep. 30, 2019		43,007			0

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Cash flows from operating activities:
Net income (loss)	$ (7,771)	$ (16,577)
Adjustments to reconcile net (loss) income to net cash provided by (used in) operating activities:
Depreciation and amortization	11,469	15,905
Recovery from doubtful accounts	(156)	61
Stock-based compensation expense	5,788	4,331
Non-cash provision for restructuring	0	1,083
Non-cash interest expense	7,054	8,697
Loss (gain) on extinguishment of debt	2,878	0
Unrealized foreign currency transaction losses (gains)	237	(794)
Provision for (benefit from) deferred taxes	(886)	6
Changes in operating assets and liabilities, net of effects from acquisitions:
Accounts receivable	14,192	10,129
Inventories	788	294
Prepaid expenses and other assets	(3,526)	3,724
Accounts payable	(3,661)	3,467
Accrued expenses, compensation and benefits and other liabilities	(13,035)	(12,453)
Income taxes payable	372	423
Deferred revenue and contract assets	(12,631)	(22,544)
Net cash provided by (used in) operating activities	1,112	(4,248)
Cash flows from investing activities:
Purchases of property and equipment	(5,629)	(7,540)
Increase in other long-term assets	0	(25)
Net cash used in investing activities	(5,629)	(7,565)
Cash flows from financing activities:
Proceeds from long-term debt	79,286	22,688
Repayment of debt	(1,113)	(7,808)
Payments for repurchase of outstanding notes	(76,269)	0
Proceeds from the issuance of common stock under employee stock plans	309	266
Common stock repurchases for tax withholdings for net settlement of equity awards	(3,444)	(957)
Partial unwind capped call cash receipt	27	0
Payments for credit facility issuance costs	(5,979)	0
Net cash (used in) provided by financing activities	(7,183)	14,189
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(615)	(358)
Net increase (decrease) in cash, cash equivalents and restricted cash	(12,315)	2,018
Cash, cash equivalents and restricted cash at beginning of period	68,094	60,433
Cash, cash equivalents and restricted cash at end of period	55,779	62,451
Supplemental Cash Flow Information [Abstract]
Cash and cash equivalents at end of period	52,289	50,460
Restricted cash	1,664	8,500
Restricted cash included in other long-term assets	1,826	3,491
Cash paid (refunded) for income taxes	941	(2,268)
Cash paid for interest	$ 7,780	$ 9,024

FINANCIAL INFORMATION (Notes)

FINANCIAL INFORMATION (Notes)	9 Months Ended
	Sep. 30, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
FINANCIAL INFORMATION	FINANCIAL INFORMATION The accompanying condensed consolidated financial statements include the accounts of Avid Technology, Inc. and its wholly owned subsidiaries (collectively, “we” or “our”). These financial statements are unaudited. However, in the opinion of management, the condensed consolidated financial statements reflect all normal and recurring adjustments necessary for their fair statement. Interim results are not necessarily indicative of results expected for any other interim period or a full year. We prepared the accompanying unaudited condensed consolidated financial statements in accordance with the instructions for Form 10-Q and, therefore, include all information and footnotes necessary for a complete presentation of operations, comprehensive income (loss), financial position, changes in stockholders’ deficit, and cash flows in conformity with accounting principles generally accepted in the United States of America (“U.S. GAAP”). The accompanying condensed consolidated balance sheet as of December 31, 2018 was derived from our audited consolidated financial statements and does not include all disclosures required by U.S. GAAP for annual financial statements. We filed audited consolidated financial statements as of and for the year ended December 31, 2018 in our Annual Report on Form 10-K for the year ended December 31, 2018 , which included information and footnotes necessary for such presentation. The financial statements contained in this Form 10-Q should be read in conjunction with the audited consolidated financial statements in our Annual Report on Form 10-K for the year ended December 31, 2018 . Our preparation of 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 disclosures of contingent assets and liabilities at the dates of the condensed consolidated financial statements and the reported amounts of revenues and expenses during the reported periods. Actual results could differ from our estimates. Significant Accounting Policies - Revenue Recognition We enter into contracts with customers that include various combinations of products and services, which are typically capable of being distinct and are accounted for as separate performance obligations. We account for a contract when (i) it has approval and commitment from both parties, (ii) the rights of the parties have been identified, (iii) payment terms have been identified, (iv) the contract has commercial substance, and (v) collectibility is probable. We recognize revenue upon transfer of control of promised products or services to customers, which typically occurs upon shipment or delivery depending on the terms of the underlying contracts, in an amount that reflects the consideration we expect to receive in exchange for those products or services. We often enter into contractual arrangements that have multiple performance obligations, one or more of which may be delivered subsequent to the delivery of other performance obligations. These arrangements may include a combination of products, support, training, and professional services. We allocate the transaction price of the arrangement based on the relative estimated standalone selling price of each distinct performance obligation. See Note 10 for disaggregated revenue schedules and further discussion on revenue and deferred revenue performance obligations and the timing of revenue recognition. Recently Adopted Accounting Pronouncements On January 1, 2019, we adopted ASC Topic 842, Leases (“ASC 842”) using the modified retrospective transition approach, as provided by ASU No. 2018-11, Leases - Targeted Improvements (“ASU 2018-11”). We elected the package of practical expedients permitted under the transition guidance. Results for reporting periods beginning after January 1, 2019 are presented under ASC 842, while prior periods have not been adjusted and continue to be reported in accordance with our historic accounting under previous U.S. GAAP. The primary impact of ASC 842 is that substantially all of our leases are recognized on the balance sheet, by recording right-of-use assets and short-term and long-term lease liabilities. The new standard does not have a material impact on our consolidated statement of operations and cash flows, and the effect of applying ASC 842 as a cumulative-effect adjustment to retained earnings as of January 1, 2019 is immaterial. A summary of the changes to balance sheet line items that resulted from the adoption of ASC 842 as of January 1, 2019 is as follows (in thousands): As of January 1, 2019 As Previously Reported Impact of Adoption of Topic 842 As Adjusted Assets: Property and equipment, net $ 21,582 $ 256 $ 21,838 Right of use assets $ — $ 37,749 $ 37,749 Liabilities: Accrued expenses and other current liabilities $ 37,547 $ 6,957 $ 44,504 Long-term lease liabilities $ — $ 35,694 $ 35,694 Other long-term liabilities $ 10,302 $ (4,646 ) $ 5,656 In accordance with guidance provided by the SEC staff, as of March 31, 2019, we began complying with expanded disclosure requirements under applicable SEC rules regarding the analysis of changes in stockholders' equity for interim financial statements.

NET INCOME PER SHARE Earnings P

NET INCOME PER SHARE Earnings Per Share (Notes)	9 Months Ended
	Sep. 30, 2019
Earnings Per Share [Abstract]
NET INCOME PER SHARE	NET INCOME PER SHARE Net (loss) income per common share is presented for both basic (loss) income per share (“Basic EPS”) and diluted (loss) income per share (“Diluted EPS”). Basic EPS is based on the weighted-average number of common shares outstanding during the period. Diluted EPS is based on the weighted-average number of common shares and common share equivalents outstanding during the period. The potential common shares that were considered anti-dilutive securities were excluded from the diluted earnings per share calculations for the relevant periods either because the sum of the exercise price per share and the unrecognized compensation cost per share was greater than the average market price of our common stock for the relevant periods, or because they were considered contingently issuable. The contingently issuable potential common shares result from certain stock options and restricted stock units granted to our employees that vest based on performance conditions, market conditions, or a combination of performance and market conditions. The following table sets forth (in thousands) potential common shares that were considered anti-dilutive securities at September 30, 2019 and 2018 . September 30, 2019 September 30, 2018 Options 594 916 Non-vested restricted stock units 2,699 3,009 Anti-dilutive potential common shares 3,293 3,925 We issued our 2.00% senior convertible notes due 2020 (the “Notes”) on June 15, 2015. The Notes are convertible into cash, shares of our common stock, or a combination of cash and shares of common stock, at our election, based on an initial conversion rate, subject to adjustment. In connection with the offering of the Notes, we entered into a capped call transaction, or Capped Call, with a third party. We use the treasury stock method in computing the dilutive impact of the Notes. The Notes are convertible into shares of our common stock but our stock prices as of September 30, 2019 and 2018 were less than the conversion price of $21.94 per share, and, therefore, the Notes are excluded from Diluted EPS. The Capped Call is not reflected in diluted net income per share as it will always be anti-dilutive.

FAIR VALUE MEASUREMENTS (Notes)

FAIR VALUE MEASUREMENTS (Notes)	9 Months Ended
	Sep. 30, 2019
Fair Value Disclosures [Abstract]
FAIR VALUE MEASUREMENTS	FAIR VALUE MEASUREMENTS Assets Measured at Fair Value on a Recurring Basis We measure deferred compensation investments on a recurring basis. As of September 30, 2019 and December 31, 2018 , our deferred compensation investments were classified as either Level 1 or Level 2 in the fair value hierarchy. Assets valued using quoted market prices in active markets and classified as Level 1 are money market and mutual funds. Assets valued based on other observable inputs and classified as Level 2 are insurance contracts. The following tables summarize our deferred compensation investments measured at fair value on a recurring basis (in thousands): Fair Value Measurements at Reporting Date Using September 30, Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Financial assets: Deferred compensation assets $ 1,366 $ 321 $ 1,044 $ — Fair Value Measurements at Reporting Date Using December 31, 2018 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Financial assets: Deferred compensation assets $ 1,372 $ 386 $ 986 $ — Financial Instruments Not Recorded at Fair Value The carrying amounts of our other financial assets and liabilities including cash, accounts receivable, accounts payable, and accrued liabilities approximate their respective fair values because of the relatively short period of time between their origination and their expected realization or settlement. As of September 30, 2019 , the net carrying amount of the Notes was $27.8 million , and the fair value of the Notes was approximately $28.3 million based on open market trading activity, which constitutes a Level 1 input in the fair value hierarchy.

INVENTORIES (Notes)

INVENTORIES (Notes)	9 Months Ended
	Sep. 30, 2019
Inventory Disclosure [Abstract]
INVENTORIES	INVENTORIES Inventories consisted of the following (in thousands): September 30, 2019 December 31, 2018 Raw materials $ 10,590 $ 10,520 Work in process 390 527 Finished goods 21,188 21,909 Total $ 32,168 $ 32,956 As of September 30, 2019 and December 31, 2018 , finished goods inventory included $1.5 million and $2.1 million , respectively, associated with products shipped to customers and deferred labor costs for arrangements where revenue recognition had not yet commenced.

INTANGIBLE ASSETS AND GOODWILL

INTANGIBLE ASSETS AND GOODWILL INTANGIBLE ASSETS (Notes)	9 Months Ended
	Sep. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
INTANGIBLE ASSETS AND GOODWILL	INTANGIBLE ASSETS AND GOODWILL Amortizing identifiable intangible assets related to our acquisitions or capitalized costs of internally developed or externally purchased software that form the basis for our products consisted of the following (in thousands): September 30, 2019 December 31, 2018 Gross Accumulated Amortization Net Gross Accumulated Amortization Net Completed technologies and patents $ 58,150 $ (58,150 ) $ — $ 58,246 $ (54,508 ) $ 3,738 Customer relationships 54,689 (54,689 ) — 54,986 (54,292 ) 694 Trade names 1,346 (1,346 ) — 1,346 (1,346 ) — Capitalized software costs 4,911 (4,911 ) — 4,911 (4,911 ) — Total $ 119,096 $ (119,096 ) $ — $ 119,489 $ (115,057 ) $ 4,432 As of June 30, 2019, intangible assets were fully amortized. Amortization expense related to intangible assets in the aggregate was $2.3 million for the three months ended September 30, 2018 and $4.4 million and $6.9 million for the nine months ended September 30, 2019 and 2018 , respectively. The acquisition of Orad in 2015 resulted in goodwill of $32.6 million as of September 30, 2019 and December 31, 2018 .

LEASES LEASES (Notes)

LEASES LEASES (Notes)	9 Months Ended
	Sep. 30, 2019
Leases [Abstract]
LEASES	LEASES We have entered into a number of facility leases to support our research and development activities, sales operations, and other corporate and administrative functions in North America, Europe, and Asia, which qualify as operating leases under U.S. GAAP. We also have a limited number of equipment leases that also qualify as operating leases. We determine if contracts with vendors represent a lease or have a lease component under U.S. GAAP at contract inception. We do not have any finance leases as of September 30, 2019 . Our leases have remaining terms ranging from less than one year to nine years . Some of our leases include options to extend or terminate the lease prior to the end of the agreed upon lease term. For purposes of calculating lease liabilities, lease terms include options to extend or terminate the lease when it is reasonably certain that we will exercise such options. Operating lease right of use assets and liabilities are recognized based on the present value of the future minimum lease payments over the lease term at the lease commencement date. As our leases generally do not provide an implicit rate, we use an estimated incremental borrowing rate in determining the present value of future payments. The incremental borrowing rate represents an estimate of the interest rate we would incur at lease commencement to borrow an amount equal to the lease payments on a collateralized basis over the term of a lease within a particular location and currency environment. We used an average incremental borrowing rate of 6% as of January 1, 2019, the adoption date of ASC 842, for our leases that commenced prior to that date. The operating leases are included in “Right of use assets,” “Accrued expenses and other current liabilities,” and “Long-term lease liabilities” on our condensed consolidated balance sheets as of September 30, 2019 . The weighted-average remaining lease term of our operating leases is 7.0 years as of September 30, 2019 . Lease costs for minimum lease payments is recognized on a straight-line basis over the lease term. Our total lease costs were $2.4 million and $7.2 million for the three and nine months ended September 30, 2019 , respectively, and related cash payments were $2.4 million and $7.3 million for the three and nine months ended September 30, 2019 , respectively. Lease costs are included within research and development, marketing and selling, and general and administrative lines on the condensed consolidated statements of operations, and the related cash payments are included in the operating cash flows on the condensed consolidated statements of cash flows. Short-term lease costs, variable lease costs, and sublease income are not material. The table below reconciles the undiscounted future minimum lease payments under non-cancelable leases with terms of more than one year to the total lease liabilities recognized on the condensed consolidated balance sheets as of September 30, 2019 (in thousands): Year Ending December 31, Operating Leases 2019 (excluding nine months ended September 30, 2019) $ 2,382 2020 8,448 2021 5,928 2022 5,177 2023 4,301 Thereafter 19,076 Total future minimum lease payments $ 45,312 Less effects of discounting (8,771 ) Total lease liabilities $ 36,541 Reported as of September 30, 2019 Accrued expenses and other current liabilities $ 7,611 Long-term lease liabilities 28,930 Total lease liabilities $ 36,541 The future minimum lease commitments under non-cancelable leases at December 31, 2018 were as follows (in thousands): Year Ending December 31, 2019 $ 11,225 2020 9,784 2021 6,850 2022 5,982 2023 4,754 Thereafter 20,040 Total $ 58,635

OTHER LONG-TERM LIABILITIES Lon

OTHER LONG-TERM LIABILITIES Long-Term Liabilities (Notes)	9 Months Ended
	Sep. 30, 2019
Other Liabilities Disclosure [Abstract]
OTHER LONG-TERM LIABILITIES	OTHER LONG-TERM LIABILITIES Other long-term liabilities consisted of the following (in thousands): September 30, 2019 December 31, 2018 Deferred rent $ — $ 5,122 Accrued restructuring 125 188 Deferred compensation 4,596 4,992 Other 360 — Total $ 5,081 $ 10,302 Upon the adoption of ASC 842 on January 1, 2019, $5.1 million of deferred rent liabilities was reclassified as we recorded our leases in the caption “Right of use assets,” “Accrued expenses and other current liabilities,” and “Long-term lease liabilities” on our condensed consolidated balance sheets as of September 30, 2019 .

CONTINGENCIES (Notes)

CONTINGENCIES (Notes)	9 Months Ended
	Sep. 30, 2019
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS AND CONTINGENCIES	COMMITMENTS AND CONTINGENCIES Commitments We entered into a long-term agreement to purchase a variety of information technology solutions from a third party in the second quarter of 2017, which included an unconditional commitment to purchase a minimum of $12.8 million of products and services over the initial three years of the agreement. We have purchased $8.8 million of products and services pursuant to this agreement as of September 30, 2019 . We have letters of credit that are used as security deposits in connection with our leased Burlington, Massachusetts office space. In the event of default on the underlying leases, the landlords would, at September 30, 2019 , be eligible to draw against the letters of credit to a maximum of $1.3 million in the aggregate. The letters of credit are subject to aggregate reductions provided that we are not in default under the underlying leases and meet certain financial performance conditions. In no case will the letters of credit amounts for the Burlington leases be reduced to below $1.2 million in the aggregate throughout the lease periods. We also have letters of credit in connection with security deposits for other facility leases totaling $1.0 million in the aggregate, as well as letters of credit totaling $1.6 million that otherwise support our ongoing operations. These letters of credit have various terms and expire during 2019 and beyond, while some of the letters of credit may automatically renew based on the terms of the underlying agreements. We issued a letter of credit totaling $8.5 million to one of our former sole-source suppliers in February 2018. The supplier was eligible to draw on the letter of credit in the event that we were insolvent or unable to pay on our purchase orders for certain key hardware components of our products. The letter of credit was terminated as we have exited our relationship with this contract manufacturer and $8.5 million of restricted cash that was pledged as collateral was returned to us in July 2019. Substantially all of our letters of credit are collateralized by restricted cash included in the caption “Restricted cash” and “Other long-term assets” on our condensed consolidated balance sheets as of September 30, 2019 . Contingencies Our industry is characterized by the existence of a large number of patents and frequent claims and litigation regarding patent and other intellectual property rights. In addition to the legal proceedings described above, we are involved in legal proceedings from time to time arising from the normal course of business activities, including claims of alleged infringement of intellectual property rights and contractual, commercial, employee relations, product or service performance, or other matters. We do not believe these matters will have a material adverse effect on our financial position or results of operations. However, the outcome of legal proceedings and claims brought against us is subject to significant uncertainty. Therefore, our financial position or results of operations may be negatively affected by the unfavorable resolution of one or more of these proceedings for the period in which a matter is resolved. Our results could be materially adversely affected if we are accused of, or found to be, infringing third parties’ intellectual property rights. Following the termination of our former Chairman and Chief Executive Officer on February 25, 2018, we received a notice alleging that we breached the former employee’s employment agreement. On April 16, 2019 we received an additional notice again alleging we breached the former employee’s employment agreement. We have since been in communications with our former Chairman and Chief Executive Officer’s counsel. While we intend to defend any claim vigorously, when and if a claim is actually filed, we are currently unable to estimate an amount or range of any reasonably possible losses that could occur as a result of this matter. We consider all claims on a quarterly basis and based on known facts assess whether potential losses are considered reasonably possible, probable, and estimable. Based upon this assessment, we then evaluate disclosure requirements and whether to accrue for such claims in our condensed consolidated financial statements. We record a provision for a liability when it is both probable that a liability has been incurred and the amount of the loss can be reasonably estimated. These provisions are reviewed at least quarterly and adjusted to reflect the impacts of negotiations, settlements, rulings, advice of legal counsel, and other information and events pertaining to a particular case. At September 30, 2019 and as of the date of filing of these condensed consolidated financial statements, we believe that, other than as set forth in this note, no provision for liability nor disclosure is required related to any claims because: (a) there is no reasonable possibility that a loss exceeding amounts already recognized (if any) may be incurred with respect to such claim, (b) a reasonably possible loss or range of loss cannot be estimated, or (c) such estimate is immaterial. Additionally, we provide indemnification to certain customers for losses incurred in connection with intellectual property infringement claims brought by third parties with respect to our products. These indemnification provisions generally offer perpetual coverage for infringement claims based upon the products covered by the agreement and the maximum potential amount of future payments we could be required to make under these indemnification provisions is theoretically unlimited. To date, we have not incurred material costs related to these indemnification provisions; accordingly, we believe the estimated fair value of these indemnification provisions is immaterial. Further, certain of our arrangements with customers include clauses whereby we may be subject to penalties for failure to meet certain performance obligations; however, we have not recorded any related material penalties to date. We provide warranties on externally sourced and internally developed hardware. For internally developed hardware, and in cases where the warranty granted to customers for externally sourced hardware is greater than that provided by the manufacturer, we record an accrual for the related liability based on historical trends and actual material and labor costs. The following table sets forth the activity in the product warranty accrual account for the nine months ended September 30, 2019 and 2018 (in thousands): Nine Months Ended September 30, 2019 2018 Accrual balance at beginning of year $ 1,706 $ 2,545 Accruals for product warranties 732 1,612 Costs of warranty claims (1,016 ) (1,802 ) Accrual balance at end of period $ 1,422 $ 2,355 The warranty accrual is included in the caption “accrued expenses and other current liabilities” in our condensed consolidated balance sheet.

RESTRUCTURING COSTS AND ACCRUAL

RESTRUCTURING COSTS AND ACCRUALS (Notes)	9 Months Ended
	Sep. 30, 2019
Restructuring and Related Activities [Abstract]
RESTRUCTURING COSTS AND ACCRUALS	RESTRUCTURING COSTS AND ACCRUALS In February 2016, we committed to a cost efficiency program that encompassed a series of measures intended to allow us to more efficiently operate in a leaner, more directed cost structure. These included reductions in our workforce, consolidation of facilities, transfers of certain business processes to lower cost regions, and reductions in other third-party services costs. During the three and nine months ended September 30, 2019 , we recorded restructuring charges of $0.2 million and $0.5 million for employee severance cost adjustments, respectively. During the three and nine months ended September 30, 2018 , we recorded restructuring charges of $0.2 million and $3.4 million , respectively. The restructuring charges for the nine months ended September 30, 2018 included $1.7 million of severance costs adjustments, $0.2 million facility restructuring accrual adjustments resulting from the consolidation of our facilities in Burlington, Massachusetts, and $1.1 million of leasehold improvement write-off. Restructuring Summary The following table sets forth restructuring expenses recognized for the three and nine months ended September 30, 2019 and 2018 (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 Employee $ 202 $ 879 $ 473 $ 1,734 Facility — (895 ) 5 177 Total facility and employee charges 202 (16 ) 478 1,911 Other 27 242 40 1,490 Total restructuring charges, net $ 229 $ 226 $ 518 $ 3,401 The following table sets forth the activity in the restructuring accruals for the nine months ended September 30, 2019 (in thousands): Employee Facility Total Accrual balance as of December 31, 2018 $ 2,541 $ 318 $ 2,859 Restructuring charges and revisions 473 5 478 Accretion — 14 14 Cash payments (2,702 ) (118 ) (2,820 ) Foreign exchange impact on ending balance (22 ) 1 (21 ) Accrual balance as of September 30, 2019 $ 290 $ 220 $ 510 Less: current portion 290 95 385 Long-term accrual balance as of September 30, 2019 $ — $ 125 $ 125 The employee restructuring accrual at September 30, 2019 represents severance costs to former employees that will be paid out within 12 months, and is, therefore, included in the caption “accrued expenses and other current liabilities” in our condensed consolidated balance sheets as of September 30, 2019 . The facility restructuring accrual at September 30, 2019 represents contractual lease payments, net of actual or estimated sublease income, on space vacated as part of our restructuring actions. The leases, and payments against the amounts accrued, extend through 2026 unless we are able to negotiate earlier terminations. Of the total facility restructuring balance, $0.1 million is included in the caption “accrued expenses and other current liabilities” and $0.1 million is included in the caption “other long-term liabilities” in our condensed consolidated balance sheet as of September 30, 2019

REVENUE (Notes)

REVENUE (Notes)	9 Months Ended
	Sep. 30, 2019
Segment Reporting Information [Line Items]
PRODUCT AND GEOGRAPHIC INFORMATION	REVENUE Disaggregated Revenue and Geography Information Through the evaluation of the discrete financial information that is regularly reviewed by the chief operating decision makers (our chief executive officer and chief financial officer), we have determined that we have one reportable segment. The following table is a summary of our revenues by type for the three and nine months ended September 30, 2019 and 2018 (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 Products and solutions net revenues $ 42,911 $ 52,133 $ 147,633 $ 144,922 Subscription services 10,297 8,786 29,339 25,577 Support services 33,361 35,033 97,018 104,869 Professional services, training and other services 6,892 8,094 21,491 25,230 Total net revenues $ 93,461 $ 104,046 $ 295,481 $ 300,598 The following table sets forth our revenues by geographic region for the three and nine months ended September 30, 2019 and 2018 (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 Revenues: United States $ 31,267 $ 37,078 $ 110,697 $ 112,726 Other Americas 9,471 7,466 23,232 20,216 Europe, Middle East and Africa 40,579 43,179 115,171 124,148 Asia-Pacific 12,144 16,323 46,381 43,508 Total net revenues $ 93,461 $ 104,046 $ 295,481 $ 300,598

REVENUE Deferred Revenue Disclo

REVENUE Deferred Revenue Disclosure (Notes)	9 Months Ended
	Sep. 30, 2019
Deferred Revenue Arrangement [Line Items]
Deferred Revenue Disclosure [Text Block]	Contract Asset Contract asset activity for the nine months ended September 30, 2019 was as follows (in thousands): September 30, 2019 Contract asset at January 1, 2019 $ 16,513 Revenue in excess of billings 20,016 Customer billings (22,111 ) Contract asset at September 30, 2019 $ 14,418 Less: long-term portion (recorded in other long-term assets) — Contract asset, current portion $ 14,418 Deferred Revenue Deferred revenue activity for the nine months ended September 30, 2019 was as follows (in thousands): September 30, 2019 Deferred revenue at January 1, 2019 $ 99,601 Billings deferred 54,882 Recognition of prior deferred revenue (69,502 ) Deferred revenue at September 30, 2019 $ 84,981 A summary of the significant performance obligations included in deferred revenue as of September 30, 2019 is as follows (in thousands): September 30, 2019 Product $ 7,363 Subscription 2,071 Support contracts 60,681 Implied PCS 12,816 Professional services, training and other 2,050 Deferred revenue at September 30, 2019 $ 84,981 Remaining Performance Obligations For transaction prices allocated to remaining performance obligations, we apply practical expedients and do not disclose quantitative or qualitative information for remaining performance obligations (i) that have original expected durations of one year or less and (ii) where we recognize revenue equal to what we have the right to invoice and that amount corresponds directly with the value to the customer of our performance to date. Historically, for many of our products, we had an ongoing practice of making when-and-if-available software updates available to customers free of charge for a period of time after initial sales to customers. The expectation created by this practice of providing free Software Updates represents an implied obligation of a form of post-contract customer support (“Implied PCS”) which represents a performance obligation. While we have ceased providing Implied PCS on new product offerings, we continue to provide Implied PCS for older products that were predominately sold in prior years. Revenue attributable to Implied PCS performance obligations is recognized over time on a ratable basis over the period that Implied PCS is expected to be provided, which is typically six years . We have remaining performance obligations of $12.8 million attributable to Implied PCS recorded in deferred revenue as of September 30, 2019 . We expect to recognize revenue for these remaining performance obligations of $1.6 million for the remainder of 2019 and $5.0 million , $3.0 million , $1.7 million and $1.0 million for the years ended December 31, 2020, 2021, 2022, and 2023, respectively. As of September 30, 2019 , we had approximately $51.2 million of transaction price allocated to remaining performance obligations for certain enterprise agreements that have not yet been fully invoiced. Approximately $50.7 million of these performance obligations were unbilled as of September 30, 2019 . Remaining performance obligations represent obligations we must deliver for specific products and services in the future where there is not yet an enforceable right to invoice the customer. Our remaining performance obligations do not include contractually committed minimum purchases that are common in our strategic purchase agreements with resellers since our specific obligations to deliver products or services is not yet known, as customers may satisfy such commitments by purchasing an unknown combination of current or future product offerings. While the timing of fulfilling individual performance obligations under the contracts can vary dramatically based on customer requirements, we expect to recognize the $51.2 million in roughly equal installments through 2026. Remaining performance obligation estimates are subject to change and are affected by several factors, including terminations due to contract breach, contract amendments, and changes in the expected timing of delivery.

LONG-TERM DEBT AND CREDIT AGREE

LONG-TERM DEBT AND CREDIT AGREEMENT Debt Disclosure (Notes)	9 Months Ended
	Sep. 30, 2019
LONG TERM DEBT AND CREDIT AGREEMENT	LONG-TERM DEBT AND CREDIT AGREEMENT Long-term debt consisted of the following (in thousands): September 30, 2019 December 31, 2018 Term Loan, net of unamortized debt issuance costs of $3,578 at September 30, 2019 and $2,613 at December 31, 2018 $ 200,180 $ 122,811 Notes, net of unamortized original issue discount and debt issuance costs of $1,046 at September 30, 2019 and $9,022 at December 31, 2018 27,821 97,731 Other long-term debt 1,297 1,453 Total debt 229,298 221,995 Less: current portion 29,705 1,405 Total long-term debt $ 199,593 $ 220,590 The following table summarizes the maturities of our borrowing obligations as of September 30, 2019 (in thousands): Fiscal Year Term Loan Notes Other Long-Term Debt Total 2019 $ 319 $ — $ 32 $ 351 2020 2,231 28,867 133 31,231 2021 4,781 — 143 4,924 2022 6,375 — 153 6,528 2023 190,052 — 164 190,216 Thereafter — — 672 672 Total before unamortized discount 203,758 28,867 1,297 233,922 Less: unamortized discount and issuance costs 3,578 1,046 — 4,624 Less: current portion of long-term debt 1,753 27,821 131 29,705 Total long-term debt $ 198,427 $ — $ 1,166 $ 199,593 2.00% Convertible Senior Notes due 2020 On June 15, 2015, we issued $125.0 million aggregate principal amount of our Notes in an offering conducted in accordance with Rule 144A under the Securities Act of 1933. The Notes pay interest semi-annually on June 15 and December 15 of each year at an annual rate of 2.00% and mature on June 15, 2020, unless earlier repurchased or converted in accordance with their terms prior to such date. Total interest expense for the three and nine months ended September 30, 2019 was $0.5 million and $3.9 million , respectively, reflecting the coupon and accretion of the discount. During 2017, we purchased 2,000 of our 125,000 outstanding Notes and settled $2.0 million of the Notes for $1.7 million in cash. We recorded $2.0 million extinguishment of debt, an immaterial amount of equity reacquisition, and an immaterial loss on the extinguishment of debt. During 2018, we purchased an additional 16,247 of our 123,000 outstanding Notes and settled another $16.2 million of the Notes for $14.7 million in cash. We recorded $16.2 million extinguishment of debt, an immaterial amount of equity reacquisition, and an immaterial gain on the extinguishment of debt. On January 22, 2019, we purchased an additional 3,900 of our 106,753 outstanding Notes and settled another $3.9 million of the Notes for $3.6 million in cash. We recorded $3.9 million extinguishment of debt, an immaterial amount of equity reacquisition, and an immaterial gain on the extinguishment of debt. On April 11, 2019, we announced the commencement of a cash tender offer (the “Offer”) for any and all of our outstanding Notes. On May 9, 2019, as of the expiration of the Offer, Notes with an aggregate principal amount of $74.0 million were validly tendered. We accepted for purchase all Notes that were validly tendered at the expiration of the Offer at a purchase price equal to $982.50 per $1,000 principal amount of Notes, and settled the Offer on May 13, 2019 for $72.7 million in cash. We recorded $74.0 million extinguishment of debt, $0.6 million of equity reacquisition, and $2.9 million loss on the extinguishment of debt. In connection with the Offer, the number of options under the Capped Call was reduced to 28,867 to mirror the remaining principal outstanding for the Notes, and an immaterial partial unwind cash payment was received in May 2019. Term Loan and Credit Facility On February 26, 2016, we entered into a financing agreement (the “Financing Agreement”) with Cerberus Business Finance, LLC, as collateral and administrative agent, and the lenders party thereto (the “Lenders”). The Lenders originally agreed to provide us with (a) a term loan in the aggregate principal amount of $100.0 million (the “Term Loan”), and (b) a revolving credit facility (the “Credit Facility”) of up to a maximum of $5.0 million in borrowings outstanding at any time. We granted a security interest on substantially all of our assets to secure the obligations under the Term Loan and the Credit Facility. The Term Loan requires us to use 50% of excess cash flow, as defined in the Financing Agreement, to repay outstanding principal of the loans under the Financing Agreement. The Financing Agreement contains customary representations and warranties, covenants, mandatory prepayments, and events of default under which our payment obligations may be accelerated. On November 9, 2017, we entered into an amendment and borrowed an additional $15.0 million term loan and increased the amount available under the Credit Facility by $5.0 million . On May 10, 2018, we entered into an amendment to the Financing Agreement, which extended the maturity of the Financing Agreement to May 2023, and increased the Term Loan by $22.7 million and the amount available under the Credit Facility by $12.5 million, for an aggregate amount available of $22.5 million. Under the terms of the amendment, aggregate quarterly principal repayments beginning September 30, 2018 through June 30, 2020 will be $318,750, then from July 1, 2020 through June 30, 2021 equal to $796,875, and finally from July 1, 2021 through May 10, 2023 equal to $1,593,750. On April 8, 2019, we entered into an amendment to the Financing Agreement. The amendment provides for an additional delayed draw term loan commitment in the aggregate principal amount of $100.0 million (the “Delayed Draw Funds”) for the purpose of funding the purchase of a portion of Notes in the Offer described above. On May 2, 2019, we received the Delayed Draw Funds under the Financing Agreement. We used $72.7 million of the Delayed Draw Funds for the purchase of a portion of our Notes, $0.6 million for the Notes interest payment, and $6.0 million for the payment of refinancing fees. On June 18, 2019, we repaid $20.7 million of the Delayed Draw Funds. The $79.3 million Delayed Draw Funds borrowed will mature on May 10, 2023 under the Financing Agreement, and interest accrues on the Delayed Draw Funds and the existing outstanding borrowings under the Financing Agreement at a rate of either the LIBOR Rate (as defined in the Financing Agreement) plus 6.25% or a Reference Rate (as defined in the Financing Agreement) plus 5.25%, at our option. The amendment also modified the covenant that requires us to maintain a leverage ratio based on the level of availability of our Credit Facility plus unrestricted cash on-hand. The Financing Agreement amendment effective April 8, 2019 was accounted for as a debt modification, and therefore, $1.6 million of the refinancing fees paid directly to the Lenders was recorded as deferred debt issuance costs, and $4.4 million of the refinancing fees paid to the third parties was expensed. We recorded $4.6 million and $11.7 million of interest expense on the Term Loan during the three and nine months ended September 30, 2019 , respectively. There were no amounts outstanding under the Credit Facility as of September 30, 2019 . We were in compliance with the Financing Agreement covenants as of September 30, 2019 .

STOCKHOLDERS' EQUITY Share-Base

STOCKHOLDERS' EQUITY Share-Based Compensation (Notes)	9 Months Ended
	Sep. 30, 2019
STOCKHOLDERS' EQUITY	STOCKHOLDERS’ EQUITY Stock-Based Compensation Information with respect to option shares granted under all of our stock incentive plans for the nine months ended September 30, 2019 was as follows: Time-Based Shares Performance-Based Shares Total Shares Weighted- Average Exercise Price Weighted- Average Remaining Contractual Term (years) Aggregate Intrinsic Value (in thousands) Options outstanding at January 1, 2019 891,892 — 891,892 $8.46 Granted — — — $— Exercised (66,506 ) — (66,506 ) $7.39 Forfeited or canceled (231,886 ) — (231,886 ) $10.96 Options outstanding at September 30, 2019 593,500 — 593,500 $7.60 1.37 $— Options vested at September 30, 2019 or expected to vest 593,500 $7.60 1.37 $— Options exercisable at September 30, 2019 593,500 $7.60 1.37 $— Information with respect to our non-vested restricted stock units for the nine months ended September 30, 2019 was as follows: Non-Vested Restricted Stock Units Time-Based Shares Performance-Based Shares Total Shares Weighted- Average Grant-Date Fair Value Weighted- Average Remaining Contractual Term (years) Aggregate Intrinsic Value (in thousands) Non-vested at January 1, 2019 1,978,676 966,143 2,944,819 $4.91 Granted 1,212,076 411,043 1,623,119 $7.33 Vested (830,949 ) (666,451 ) (1,497,400 ) $4.85 Forfeited (214,710 ) (156,470 ) (371,180 ) $5.39 Non-vested at September 30, 2019 2,145,093 554,265 2,699,358 $6.33 1.12 $16,682 Expected to vest 2,699,358 $6.33 1.12 $16,682 Stock-based compensation was included in the following captions in our condensed consolidated statements of operations for the three and nine months ended September 30, 2019 and 2018 (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 Cost of products revenues $ 103 $ 40 $ 244 $ 83 Cost of services revenues 82 55 177 139 Research and development expenses 305 236 762 439 Marketing and selling expenses 532 419 1,276 1,152 General and administrative expenses 1,023 1,326 3,329 2,518 $ 2,045 $ 2,076 $ 5,788 $ 4,331

FINANCIAL INFORMATION Significa

FINANCIAL INFORMATION Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2019
Financial Information [Abstract]
Revenue Recognition, Deferred Revenue [Policy Text Block]	Significant Accounting Policies - Revenue Recognition We enter into contracts with customers that include various combinations of products and services, which are typically capable of being distinct and are accounted for as separate performance obligations. We account for a contract when (i) it has approval and commitment from both parties, (ii) the rights of the parties have been identified, (iii) payment terms have been identified, (iv) the contract has commercial substance, and (v) collectibility is probable. We recognize revenue upon transfer of control of promised products or services to customers, which typically occurs upon shipment or delivery depending on the terms of the underlying contracts, in an amount that reflects the consideration we expect to receive in exchange for those products or services. We often enter into contractual arrangements that have multiple performance obligations, one or more of which may be delivered subsequent to the delivery of other performance obligations. These arrangements may include a combination of products, support, training, and professional services. We allocate the transaction price of the arrangement based on the relative estimated standalone selling price of each distinct performance obligation. See Note 10 for disaggregated revenue schedules and further discussion on revenue and deferred revenue performance obligations and the timing of revenue recognition.

FINANCIAL INFORMATION New Accou

FINANCIAL INFORMATION New Accounting Pronouncement Adopted (Tables)	9 Months Ended
	Sep. 30, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block]	A summary of the changes to balance sheet line items that resulted from the adoption of ASC 842 as of January 1, 2019 is as follows (in thousands): As of January 1, 2019 As Previously Reported Impact of Adoption of Topic 842 As Adjusted Assets: Property and equipment, net $ 21,582 $ 256 $ 21,838 Right of use assets $ — $ 37,749 $ 37,749 Liabilities: Accrued expenses and other current liabilities $ 37,547 $ 6,957 $ 44,504 Long-term lease liabilities $ — $ 35,694 $ 35,694 Other long-term liabilities $ 10,302 $ (4,646 ) $ 5,656

NET INCOME PER SHARE Earnings_2

NET INCOME PER SHARE Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2019
Earnings Per Share [Abstract]
Schedule of Antidilutive Securities Excluded From Computation of Net (Income) Loss Per Share	The following table sets forth (in thousands) potential common shares that were considered anti-dilutive securities at September 30, 2019 and 2018 . September 30, 2019 September 30, 2018 Options 594 916 Non-vested restricted stock units 2,699 3,009 Anti-dilutive potential common shares 3,293 3,925

FAIR VALUE MEASUREMENTS (Tables

FAIR VALUE MEASUREMENTS (Tables)	9 Months Ended
	Sep. 30, 2019
Fair Value Disclosures [Abstract]
Financial assets and liabilities measured at fair value on a recurring basis	The following tables summarize our deferred compensation investments measured at fair value on a recurring basis (in thousands): Fair Value Measurements at Reporting Date Using September 30, Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Financial assets: Deferred compensation assets $ 1,366 $ 321 $ 1,044 $ — Fair Value Measurements at Reporting Date Using December 31, 2018 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Financial assets: Deferred compensation assets $ 1,372 $ 386 $ 986 $ —

INVENTORIES (Tables)

INVENTORIES (Tables)	9 Months Ended
	Sep. 30, 2019
Inventory Disclosure [Abstract]
Inventories	Inventories consisted of the following (in thousands): September 30, 2019 December 31, 2018 Raw materials $ 10,590 $ 10,520 Work in process 390 527 Finished goods 21,188 21,909 Total $ 32,168 $ 32,956

INTANGIBLE ASSETS (Tables)

INTANGIBLE ASSETS (Tables)	9 Months Ended
	Sep. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization of identifiable intangible assets	Amortizing identifiable intangible assets related to our acquisitions or capitalized costs of internally developed or externally purchased software that form the basis for our products consisted of the following (in thousands): September 30, 2019 December 31, 2018 Gross Accumulated Amortization Net Gross Accumulated Amortization Net Completed technologies and patents $ 58,150 $ (58,150 ) $ — $ 58,246 $ (54,508 ) $ 3,738 Customer relationships 54,689 (54,689 ) — 54,986 (54,292 ) 694 Trade names 1,346 (1,346 ) — 1,346 (1,346 ) — Capitalized software costs 4,911 (4,911 ) — 4,911 (4,911 ) — Total $ 119,096 $ (119,096 ) $ — $ 119,489 $ (115,057 ) $ 4,432

LEASES LEASES (Tables)

LEASES LEASES (Tables)	9 Months Ended
	Sep. 30, 2019
Leases [Abstract]
Lessee, Operating Lease, Liability, Maturity [Table Text Block]	The table below reconciles the undiscounted future minimum lease payments under non-cancelable leases with terms of more than one year to the total lease liabilities recognized on the condensed consolidated balance sheets as of September 30, 2019 (in thousands): Year Ending December 31, Operating Leases 2019 (excluding nine months ended September 30, 2019) $ 2,382 2020 8,448 2021 5,928 2022 5,177 2023 4,301 Thereafter 19,076 Total future minimum lease payments $ 45,312 Less effects of discounting (8,771 ) Total lease liabilities $ 36,541 Reported as of September 30, 2019 Accrued expenses and other current liabilities $ 7,611 Long-term lease liabilities 28,930 Total lease liabilities $ 36,541
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]	The future minimum lease commitments under non-cancelable leases at December 31, 2018 were as follows (in thousands): Year Ending December 31, 2019 $ 11,225 2020 9,784 2021 6,850 2022 5,982 2023 4,754 Thereafter 20,040 Total $ 58,635

OTHER LONG-TERM LIABILITIES L_2

OTHER LONG-TERM LIABILITIES Long-Term Liabilities (Tables)	9 Months Ended
	Sep. 30, 2019
Other Liabilities Disclosure [Abstract]
Long-term liabilities	Other long-term liabilities consisted of the following (in thousands): September 30, 2019 December 31, 2018 Deferred rent $ — $ 5,122 Accrued restructuring 125 188 Deferred compensation 4,596 4,992 Other 360 — Total $ 5,081 $ 10,302

CONTINGENCIES (Tables)

CONTINGENCIES (Tables)	9 Months Ended
	Sep. 30, 2019
Commitments and Contingencies Disclosure [Abstract]
Product warranty accrual activity	The following table sets forth the activity in the product warranty accrual account for the nine months ended September 30, 2019 and 2018 (in thousands): Nine Months Ended September 30, 2019 2018 Accrual balance at beginning of year $ 1,706 $ 2,545 Accruals for product warranties 732 1,612 Costs of warranty claims (1,016 ) (1,802 ) Accrual balance at end of period $ 1,422 $ 2,355

RESTRUCTURING COSTS AND ACCRU_2

RESTRUCTURING COSTS AND ACCRUALS (Tables)	9 Months Ended
	Sep. 30, 2019
Restructuring Cost and Reserve [Line Items]
Schedule of Restructuring and Related Costs	The following table sets forth restructuring expenses recognized for the three and nine months ended September 30, 2019 and 2018 (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 Employee $ 202 $ 879 $ 473 $ 1,734 Facility — (895 ) 5 177 Total facility and employee charges 202 (16 ) 478 1,911 Other 27 242 40 1,490 Total restructuring charges, net $ 229 $ 226 $ 518 $ 3,401 The following table sets forth the activity in the restructuring accruals for the nine months ended September 30, 2019 (in thousands): Employee Facility Total Accrual balance as of December 31, 2018 $ 2,541 $ 318 $ 2,859 Restructuring charges and revisions 473 5 478 Accretion — 14 14 Cash payments (2,702 ) (118 ) (2,820 ) Foreign exchange impact on ending balance (22 ) 1 (21 ) Accrual balance as of September 30, 2019 $ 290 $ 220 $ 510 Less: current portion 290 95 385 Long-term accrual balance as of September 30, 2019 $ — $ 125 $ 125

REVENUE Revenue from External C

REVENUE Revenue from External Customers by Type (Tables)	9 Months Ended
	Sep. 30, 2019
Revenue from External Customer [Line Items]
Revenue from External Customers by Products and Services [Table Text Block]	The following table is a summary of our revenues by type for the three and nine months ended September 30, 2019 and 2018 (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 Products and solutions net revenues $ 42,911 $ 52,133 $ 147,633 $ 144,922 Subscription services 10,297 8,786 29,339 25,577 Support services 33,361 35,033 97,018 104,869 Professional services, training and other services 6,892 8,094 21,491 25,230 Total net revenues $ 93,461 $ 104,046 $ 295,481 $ 300,598

REVENUE Revenue by Geographic A

REVENUE Revenue by Geographic Area (Tables)	9 Months Ended
	Sep. 30, 2019
Deferred Revenue Arrangement [Line Items]
Schedule of Revenues By Geographic Areas	The following table sets forth our revenues by geographic region for the three and nine months ended September 30, 2019 and 2018 (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 Revenues: United States $ 31,267 $ 37,078 $ 110,697 $ 112,726 Other Americas 9,471 7,466 23,232 20,216 Europe, Middle East and Africa 40,579 43,179 115,171 124,148 Asia-Pacific 12,144 16,323 46,381 43,508 Total net revenues $ 93,461 $ 104,046 $ 295,481 $ 300,598

REVENUE Revenue from Contract w

REVENUE Revenue from Contract with Customer (Tables)	9 Months Ended
	Sep. 30, 2019
Capitalized Contract Cost [Line Items]
Contract with Customer, Asset and Liability [Table Text Block]	Contract Asset Contract asset activity for the nine months ended September 30, 2019 was as follows (in thousands): September 30, 2019 Contract asset at January 1, 2019 $ 16,513 Revenue in excess of billings 20,016 Customer billings (22,111 ) Contract asset at September 30, 2019 $ 14,418 Less: long-term portion (recorded in other long-term assets) — Contract asset, current portion $ 14,418

REVENUE Deferred Revenue Activi

REVENUE Deferred Revenue Activity (Tables)	9 Months Ended
	Sep. 30, 2019
Deferred Revenue Arrangement [Line Items]
Deferred Revenue, by Arrangement, Disclosure [Table Text Block]	Deferred Revenue Deferred revenue activity for the nine months ended September 30, 2019 was as follows (in thousands): September 30, 2019 Deferred revenue at January 1, 2019 $ 99,601 Billings deferred 54,882 Recognition of prior deferred revenue (69,502 ) Deferred revenue at September 30, 2019 $ 84,981 A summary of the significant performance obligations included in deferred revenue as of September 30, 2019 is as follows (in thousands): September 30, 2019 Product $ 7,363 Subscription 2,071 Support contracts 60,681 Implied PCS 12,816 Professional services, training and other 2,050 Deferred revenue at September 30, 2019 $ 84,981

LONG-TERM DEBT AND CREDIT AGR_2

LONG-TERM DEBT AND CREDIT AGREEMENT Schedule of Long-Term Debt (Tables)	9 Months Ended
	Sep. 30, 2019
Debt Instrument [Line Items]
Schedule of Long-term Debt Instruments [Table Text Block]	Long-term debt consisted of the following (in thousands): September 30, 2019 December 31, 2018 Term Loan, net of unamortized debt issuance costs of $3,578 at September 30, 2019 and $2,613 at December 31, 2018 $ 200,180 $ 122,811 Notes, net of unamortized original issue discount and debt issuance costs of $1,046 at September 30, 2019 and $9,022 at December 31, 2018 27,821 97,731 Other long-term debt 1,297 1,453 Total debt 229,298 221,995 Less: current portion 29,705 1,405 Total long-term debt $ 199,593 $ 220,590
Schedule of Maturities of Long-term Debt [Table Text Block]	The following table summarizes the maturities of our borrowing obligations as of September 30, 2019 (in thousands): Fiscal Year Term Loan Notes Other Long-Term Debt Total 2019 $ 319 $ — $ 32 $ 351 2020 2,231 28,867 133 31,231 2021 4,781 — 143 4,924 2022 6,375 — 153 6,528 2023 190,052 — 164 190,216 Thereafter — — 672 672 Total before unamortized discount 203,758 28,867 1,297 233,922 Less: unamortized discount and issuance costs 3,578 1,046 — 4,624 Less: current portion of long-term debt 1,753 27,821 131 29,705 Total long-term debt $ 198,427 $ — $ 1,166 $ 199,593

STOCKHOLDERS' EQUITY Share-Ba_2

STOCKHOLDERS' EQUITY Share-Based Compensation (Tables)	9 Months Ended
	Sep. 30, 2019
Share-based Payment Arrangement, Option, Activity [Table Text Block]	Information with respect to option shares granted under all of our stock incentive plans for the nine months ended September 30, 2019 was as follows: Time-Based Shares Performance-Based Shares Total Shares Weighted- Average Exercise Price Weighted- Average Remaining Contractual Term (years) Aggregate Intrinsic Value (in thousands) Options outstanding at January 1, 2019 891,892 — 891,892 $8.46 Granted — — — $— Exercised (66,506 ) — (66,506 ) $7.39 Forfeited or canceled (231,886 ) — (231,886 ) $10.96 Options outstanding at September 30, 2019 593,500 — 593,500 $7.60 1.37 $— Options vested at September 30, 2019 or expected to vest 593,500 $7.60 1.37 $— Options exercisable at September 30, 2019 593,500 $7.60 1.37 $—
Share-based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block]	Information with respect to our non-vested restricted stock units for the nine months ended September 30, 2019 was as follows: Non-Vested Restricted Stock Units Time-Based Shares Performance-Based Shares Total Shares Weighted- Average Grant-Date Fair Value Weighted- Average Remaining Contractual Term (years) Aggregate Intrinsic Value (in thousands) Non-vested at January 1, 2019 1,978,676 966,143 2,944,819 $4.91 Granted 1,212,076 411,043 1,623,119 $7.33 Vested (830,949 ) (666,451 ) (1,497,400 ) $4.85 Forfeited (214,710 ) (156,470 ) (371,180 ) $5.39 Non-vested at September 30, 2019 2,145,093 554,265 2,699,358 $6.33 1.12 $16,682 Expected to vest 2,699,358 $6.33 1.12 $16,682
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]	Stock-based compensation was included in the following captions in our condensed consolidated statements of operations for the three and nine months ended September 30, 2019 and 2018 (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 Cost of products revenues $ 103 $ 40 $ 244 $ 83 Cost of services revenues 82 55 177 139 Research and development expenses 305 236 762 439 Marketing and selling expenses 532 419 1,276 1,152 General and administrative expenses 1,023 1,326 3,329 2,518 $ 2,045 $ 2,076 $ 5,788 $ 4,331

FINANCIAL INFORMATION New Acc_2

FINANCIAL INFORMATION New Accounting Pronouncements Adopted (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Property, Plant and Equipment, Net	$ 20,140	$ 21,582
Right of use assets	31,467	0
Accrued expenses and other current liabilities	36,531	37,547
Long-term lease liabilities	28,930	0
Other long-term liabilities	$ 5,081	10,302
Previously Reported [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Property, Plant and Equipment, Net		21,582
Right of use assets		0
Accrued expenses and other current liabilities		37,547
Long-term lease liabilities		0
Other long-term liabilities		10,302
Adjustments for New Accounting Pronouncement [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Property, Plant and Equipment, Net		256
Right of use assets		37,749
Accrued expenses and other current liabilities		6,957
Long-term lease liabilities		35,694
Other long-term liabilities		(4,646)
Accounting Standards Update 2016-02 (Topic 842) As Adjusted [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Property, Plant and Equipment, Net		21,838
Right of use assets		37,749
Accrued expenses and other current liabilities		44,504
Long-term lease liabilities		35,694
Other long-term liabilities		$ 5,656

NET INCOME PER SHARE Earnings_3

NET INCOME PER SHARE Earnings Per Share (Details) - $ / shares shares in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Antidilutive Securities Excluded from Computation of Net Loss Per Share [Line Items]
Anti-dilutive potential common shares (in thousands of shares)	3,293	3,925
Options
Antidilutive Securities Excluded from Computation of Net Loss Per Share [Line Items]
Anti-dilutive potential common shares (in thousands of shares)	594	916
Non-vested restricted stock units
Antidilutive Securities Excluded from Computation of Net Loss Per Share [Line Items]
Anti-dilutive potential common shares (in thousands of shares)	2,699	3,009
Convertible Debt [Member]
Antidilutive Securities Excluded from Computation of Net Loss Per Share [Line Items]
Debt Instrument, Convertible, Conversion Price	$ 21.94

FAIR VALUE MEASUREMENTS (Detail

FAIR VALUE MEASUREMENTS (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Convertible Notes Payable, Noncurrent	$ 27,800
Liabilities:
Convertible Notes, Carrying Value	27,821	$ 97,731
Fair Value, Recurring [Member]
Financial Assets:
Deferred compensation assets	1,366	1,372
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Financial Assets:
Deferred compensation assets	321	386
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Financial Assets:
Deferred compensation assets	1,044	986
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Financial Assets:
Deferred compensation assets	0	$ 0
Convertible Debt [Member]
Liabilities:
Convertible Notes, Fair Value Disclosure	$ 28,300

INVENTORIES (Details)

INVENTORIES (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Raw materials	$ 10,590	$ 10,520
Work in process	390	527
Finished Goods	21,188	21,909
Total inventory	32,168	32,956
Finished goods, consigned	$ 1,500	$ 2,100

INTANGIBLE ASSETS (Details)

INTANGIBLE ASSETS (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Amortization of Finite-Lived Intangible Assets	$ 2,300	$ 4,400	$ 6,900
Amortizing Identifiable Intangible Assets [Abstract]
Gross		119,096		$ 119,489
Accumulated Amortization		(119,096)		(115,057)
Net		0		4,432
Carrying value of Goodwill [Abstract]
Goodwill		32,643		32,643
Completed Technologies and Patents [Member]
Amortizing Identifiable Intangible Assets [Abstract]
Gross		58,150		58,246
Accumulated Amortization		(58,150)		(54,508)
Net		0		3,738
Customer Relationships [Member]
Amortizing Identifiable Intangible Assets [Abstract]
Gross		54,689		54,986
Accumulated Amortization		(54,689)		(54,292)
Net		0		694
Trade Names [Member]
Amortizing Identifiable Intangible Assets [Abstract]
Gross		1,346		1,346
Accumulated Amortization		(1,346)		(1,346)
Net		0		0
Capitalized Software Costs [Member]
Amortizing Identifiable Intangible Assets [Abstract]
Gross		4,911		4,911
Accumulated Amortization		(4,911)		(4,911)
Net		$ 0		$ 0

LEASES LEASES (Details)

LEASES LEASES (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019	Dec. 31, 2018
Lessee, Lease, Description [Line Items]
Operating Lease, Weighted Average Discount Rate, Percent	6.00%	6.00%
Operating Lease, Weighted Average Remaining Lease Term	7 years	7 years
Lease, Cost	$ 2,400	$ 7,200
Operating Lease, Payments	2,400	7,300
Lessee, Operating Lease, Liability, Payments, Due Remaining of Current Year	2,382	2,382
Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Two	8,448	8,448
Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Three	5,928	5,928
Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Four	5,177	5,177
Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Five	4,301	4,301
Lessee, Operating Lease, Liability, Payments, Due after Rolling Year Five	19,076	19,076
Lessee, Operating Lease, Liability, Payments Due	45,312	45,312
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	(8,771)	(8,771)
Operating Lease, Liability	36,541	36,541
Operating Lease, Liability, Current	7,611	7,611
Long-term lease liabilities	$ 28,930	$ 28,930	$ 0
Operating Leases, Future Minimum Payments Due, Next Twelve Months			11,225
Operating Leases, Future Minimum Payments, Due in Two Years			9,784
Operating Leases, Future Minimum Payments, Due in Three Years			6,850
Operating Leases, Future Minimum Payments, Due in Four Years			5,982
Operating Leases, Future Minimum Payments, Due in Five Years			4,754
Operating Leases, Future Minimum Payments, Due Thereafter			20,040
Operating Leases, Future Minimum Payments Due			$ 58,635
Minimum [Member]
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Term of Contract	1 year	1 year
Maximum [Member]
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Term of Contract	9 years	9 years

OTHER LONG-TERM LIABILITIES L_3

OTHER LONG-TERM LIABILITIES Long-Term Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Jan. 01, 2019	Dec. 31, 2018
Long-term deferred rent	$ 0	$ 5,100	$ 5,122
Long-term accrued restructuring	125		188
Long-term deferred compensation	4,596		4,992
Other Accrued Liabilities, Noncurrent	360		0
Other long-term liabilities	$ 5,081		$ 10,302

CONTINGENCIES (Details)

CONTINGENCIES (Details) - USD ($) $ in Thousands	Apr. 30, 2017	Jul. 31, 2019	Sep. 30, 2019	Sep. 30, 2018	Feb. 01, 2018
Product warranty accrual [Roll Forward]
Accrual balance at beginning of year			$ 1,706	$ 2,545
Accruals for product warranties			732	1,612
Cost of warranty claims			(1,016)	(1,802)
Accrual balance at end of period			1,422	$ 2,355
Standby Letters of Credit [Member] | Purchase Order Obligations [Member]
Loss Contingencies [Line Items]
Increase (Decrease) in Restricted Cash and Investments		$ (8,500)
Operating Lease Commitments [Abstract]
Letters of Credit Outstanding, Amount					$ 8,500
Standby Letters of Credit [Member] | Office Space - Burlington, Massachusetts [Member]
Loss Contingencies [Line Items]
Loss Contingency, Range of Possible Loss, Portion Not Accrued			1,300
Loss Contingency, Range Of Possible Loss, Portion Not Accrued, Minimum			1,200
Standby Letters of Credit [Member] | Office Space - Other Facilities [Member]
Operating Lease Commitments [Abstract]
Letters of Credit Outstanding, Amount			1,000
Standby Letters of Credit [Member] | Other Operating Obligations [Member]
Operating Lease Commitments [Abstract]
Letters of Credit Outstanding, Amount			1,600
Research and Development Arrangement [Member]
Loss Contingencies [Line Items]
Long-term Purchase Commitment, Amount	$ 12,800
Long-term Purchase Commitment, Period	3 years
Research and Development Expense [Member]
Loss Contingencies [Line Items]
Other Inventory, Purchased Goods, Gross			$ 8,800

RESTRUCTURING COSTS AND ACCRU_3

RESTRUCTURING COSTS AND ACCRUALS (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Restructuring accrual [Roll Forward]
New restructuring charges - operating expenses	$ 229	$ 226	$ 518	$ 3,401
Facilities-related accruals - non-current	125		125		$ 188
Restructuring and Related Cost, Incurred Cost	202	(16)	478	1,911
Restructuring Charges	229	226	518	3,401
Employee-Related [Member]
Restructuring accrual [Roll Forward]
Accrual balance at beginning of year			2,541
New restructuring charges - operating expenses	202	879	473	1,734
Accretion			0
Cash payments			(2,702)
Foreign exchange impact on ending balance			(22)
Accrual balance at end of period	290		290
Facilities-related accruals - current	290		290
Facilities-related accruals - non-current	0		0
Facilities-Related [Member]
Restructuring accrual [Roll Forward]
Accrual balance at beginning of year			318
New restructuring charges - operating expenses	0	(895)	5	177
Accretion			14
Cash payments			(118)
Foreign exchange impact on ending balance			1
Accrual balance at end of period	220		220
Facilities-related accruals - current	95		95
Facilities-related accruals - non-current	125		125
Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Other Restructuring Costs	27	242	40	1,490
Accrual Adjustment [Member]
Restructuring accrual [Roll Forward]
Accrual balance at beginning of year			2,859
New restructuring charges - operating expenses			478
Accretion			14
Cash payments			(2,820)
Foreign exchange impact on ending balance			(21)
Accrual balance at end of period	510		510
Facilities-related accruals - current	385		385
Facilities-related accruals - non-current	125		125
2016 Plan [Member]
Restructuring accrual [Roll Forward]
Restructuring Charges		$ 200		3,400
2016 Plan [Member] | Employee-Related [Member]
Restructuring accrual [Roll Forward]
Revisions of estimated liabilities	(200)		(500)
Restructuring Charges				1,700
2016 Plan [Member] | Facilities-Related [Member]
Restructuring accrual [Roll Forward]
Restructuring Charges				200
2016 Plan [Member] | Property, Plant and Equipment [Member]
Restructuring accrual [Roll Forward]
Restructuring Charges				$ 1,100
Accrued Expenses and Other Current Liabilities [Member] | Facilities-Related [Member]
Restructuring accrual [Roll Forward]
Facilities-related accruals - current	100		100
Other Noncurrent Liabilities [Member] | Facilities-Related [Member]
Restructuring accrual [Roll Forward]
Facilities-related accruals - non-current	$ 100		$ 100

REVENUE (Details)

REVENUE (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019USD ($)	Sep. 30, 2018USD ($)	Sep. 30, 2019USD ($)	Sep. 30, 2018USD ($)
Segment Reporting, Revenue Reconciling Item [Line Items]
Number of Reportable Segments			1
Revenues	$ 93,461	$ 104,046	$ 295,481	$ 300,598
Subscription Arrangement [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	10,297	8,786	29,339	25,577
Nonsoftware Service, Support and Maintenance Arrangement [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	33,361	35,033	97,018	104,869
611710 Educational Support Services [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	6,892	8,094	21,491	25,230
Product [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	42,911	52,133	147,633	144,922
Service [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	50,550	51,913	147,848	155,676
Americas [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	31,267	37,078	110,697	112,726
Other Americas [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	9,471	7,466	23,232	20,216
Europe, Middle East and Africa [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	40,579	43,179	115,171	124,148
Asia Pacific [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	$ 12,144	$ 16,323	$ 46,381	$ 43,508

REVENUE Deferred Revenue Acti_2

REVENUE Deferred Revenue Activity (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Deferred Revenue Arrangement [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	6 years
Revenue, Remaining Performance Obligation, Amount	$ 51,200
Unbilled Receivables, Not Billable	50,700
Movement in Deferred Revenue [Roll Forward]
Deferred Revenue	84,981						$ 99,601
Deferred Revenue, Additions	54,882
Deferred Revenue, Revenue Recognized	69,502
Product [Member]
Deferred Revenue Arrangement [Line Items]
Revenue, Remaining Performance Obligation, Amount	7,363
Subscription Arrangement [Member]
Deferred Revenue Arrangement [Line Items]
Revenue, Remaining Performance Obligation, Amount	2,071
Software Service, Support and Maintenance Arrangement [Member]
Deferred Revenue Arrangement [Line Items]
Revenue, Remaining Performance Obligation, Amount	60,681
Nonsoftware Service, Support and Maintenance Arrangement [Member]
Deferred Revenue Arrangement [Line Items]
Revenue, Remaining Performance Obligation, Amount	12,816
Nonsoftware Service, Support and Maintenance Arrangement [Member] | Forecast [Member]
Deferred Revenue Arrangement [Line Items]
Revenue, Remaining Performance Obligation, Amount		$ 1,000	$ 1,700	$ 3,000	$ 5,000	$ 1,600
Software License Arrangement [Member]
Deferred Revenue Arrangement [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 2,050

REVENUE Revenue from Contract_2

REVENUE Revenue from Contract with Customer (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Capitalized Contract Cost [Line Items]
Contract with Customer, Asset, after Allowance for Credit Loss	$ 14,418	$ 16,513
Contract with Customer, Asset, Net, Noncurrent	0
Contract with Customer, Asset, Cumulative Catch-up Adjustment to Revenue, Change in Measure of Progress	20,016
Contract with Customer, Asset, Reclassified to Receivable	(22,111)
Contract with Customer, Asset, Net, Current	$ 14,418

LONG-TERM DEBT AND CREDIT AGR_3

LONG-TERM DEBT AND CREDIT AGREEMENT Debt Disclosurre (Details) - USD ($)	May 13, 2019	Apr. 08, 2019	Jan. 22, 2019	May 10, 2018	Dec. 15, 2017	Feb. 26, 2016	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018	Feb. 08, 2018	Nov. 09, 2017	Jun. 15, 2015
Debt Instrument, Periodic Payment, Principal							$ 351,000		$ 351,000
Term Loan, net of unamortized debt issuance costs							200,180,000		200,180,000		$ 122,811,000
Notes, net of unamortized original issue discount and debt issuance costs							27,821,000		27,821,000		97,731,000
Other Long-term Debt							1,297,000		1,297,000		1,453,000
Total debt							229,298,000		229,298,000		221,995,000
Short-term debt							29,705,000		29,705,000		1,405,000
Long-term Debt							199,593,000		199,593,000		$ 220,590,000
Line of Credit, Current							0		0
Debt Issuance Costs Incurred During Noncash or Partial Noncash Transaction		$ 1,600,000							5,979,000	$ 0
Debt Related Commitment Fees and Debt Issuance Costs		$ 4,400,000
Interest Expense							5,519,000	$ 5,725,000	23,994,000	17,362,000
Convertible Debt Retired			3,900		2,000						16,247
Convertible Debt Issued			106,753									123,000		125,000,000
Extinguishment of Debt, Amount	$ 74,000,000		$ 3,900,000		$ 2,000,000						$ 16,200,000
Debt Instrument, Discounted Repurchase Amount	982.50
Debt Instrument, Face Amount														$ 1,000
Adjustments to Additional Paid in Capital, Equity Component of Convertible Debt, Subsequent Adjustments	600,000							$ (1,000)	(577,000)	(23,000)
Loss (Gain) on Extinguishment of Debt	$ 2,900,000								2,878,000	0
Convertible Note Options Outstanding	28,867
Repayments of Debt	$ 72,700,000		$ 3,600,000		$ 1,700,000						14,700,000
Convertible Notes unamortized issue discount and debt issuance costs							4,624,000		4,624,000
Long-term Debt, Maturities, Repayments of Principal in Year Two							31,231,000		31,231,000
Long-term Debt, Maturities, Repayments of Principal in Year Three							4,924,000		4,924,000
Long-term Debt, Maturities, Repayments of Principal in Year Four							6,528,000		6,528,000
Long-term Debt, Maturities, Repayments of Principal in Year Five							190,216,000		190,216,000
Long-term Debt, Maturities, Repayments of Principal after Year Five							672,000		672,000
Total debt							233,922,000		233,922,000
Other Debt Obligations [Member]
Debt Instrument, Periodic Payment, Principal							32,000		32,000
Short-term debt							131,000		131,000
Long-term Debt							1,166,000		1,166,000
Convertible Notes unamortized issue discount and debt issuance costs							0		0
Long-term Debt, Maturities, Repayments of Principal in Year Two							133,000		133,000
Long-term Debt, Maturities, Repayments of Principal in Year Three							143,000		143,000
Long-term Debt, Maturities, Repayments of Principal in Year Four							153,000		153,000
Long-term Debt, Maturities, Repayments of Principal in Year Five							164,000		164,000
Long-term Debt, Maturities, Repayments of Principal after Year Five							672,000		672,000
Total debt							1,297,000		1,297,000
Cerberus Business Finance LLC [Member]
Debt Instrument, Periodic Payment, Principal							319,000		319,000
Short-term debt							1,753,000		1,753,000
Long-term Debt							198,427,000		198,427,000
Convertible Notes unamortized issue discount and debt issuance costs							3,578,000		3,578,000
Long-term Debt, Maturities, Repayments of Principal in Year Two							2,231,000		2,231,000
Long-term Debt, Maturities, Repayments of Principal in Year Three							4,781,000		4,781,000
Long-term Debt, Maturities, Repayments of Principal in Year Four							6,375,000		6,375,000
Long-term Debt, Maturities, Repayments of Principal in Year Five							190,052,000		190,052,000
Long-term Debt, Maturities, Repayments of Principal after Year Five							0		0
Total debt							203,758,000		203,758,000
Convertible Debt [Member]
Debt Instrument, Periodic Payment, Principal							0		0
Short-term debt							27,821,000		27,821,000
Long-term Debt							0		0
Long-term Debt, Gross														$ 125,000,000
Debt Instrument, Interest Rate, Stated Percentage														2.00%
Interest Expense									500,000	$ 3,900,000
Convertible Notes unamortized issue discount and debt issuance costs							1,046,000		1,046,000		9,022,000
Long-term Debt, Maturities, Repayments of Principal in Year Two							28,867,000		28,867,000
Long-term Debt, Maturities, Repayments of Principal in Year Three							0		0
Long-term Debt, Maturities, Repayments of Principal in Year Four							0		0
Long-term Debt, Maturities, Repayments of Principal in Year Five							0		0
Long-term Debt, Maturities, Repayments of Principal after Year Five							0		0
Total debt							28,867,000		28,867,000
Cerberus Business Finance LLC [Member]
Debt Instrument, Covenant Description		On April 8, 2019, we entered into an amendment to the Financing Agreement. The amendment provides for an additional delayed draw term loan commitment in the aggregate principal amount of $100.0 million (the “Delayed Draw Funds”) for the purpose of funding the purchase of a portion of Notes in the Offer described above. On May 2, 2019, we received the Delayed Draw Funds under the Financing Agreement. We used $72.7 million of the Delayed Draw Funds for the purchase of a portion of our Notes, $0.6 million for the Notes interest payment, and $6.0 million for the payment of refinancing fees. On June 18, 2019, we repaid $20.7 million of the Delayed Draw Funds. The $79.3 million Delayed Draw Funds borrowed will mature on May 10, 2023 under the Financing Agreement, and interest accrues on the Delayed Draw Funds and the existing outstanding borrowings under the Financing Agreement at a rate of either the LIBOR Rate (as defined in the Financing Agreement) plus 6.25% or a Reference Rate (as defined in the Financing Agreement) plus 5.25%, at our option. The amendment also modified the covenant that requires us to maintain a leverage ratio based on the level of availability of our Credit Facility plus unrestricted cash on-hand.		On May 10, 2018, we entered into an amendment to the Financing Agreement, which extended the maturity of the Financing Agreement to May 2023, and increased the Term Loan by $22.7 million and the amount available under the Credit Facility by $12.5 million, for an aggregate amount available of $22.5 million. Under the terms of the amendment, aggregate quarterly principal repayments beginning September 30, 2018 through June 30, 2020 will be $318,750, then from July 1, 2020 through June 30, 2021 equal to $796,875, and finally from July 1, 2021 through May 10, 2023 equal to $1,593,750.		We granted a security interest on substantially all of our assets to secure the obligations under the Term Loan and the Credit Facility. The Term Loan requires us to use 50% of excess cash flow, as defined in the Financing Agreement, to repay outstanding principal of the loans under the Financing Agreement. The Financing Agreement contains customary representations and warranties, covenants, mandatory prepayments, and events of default under which our payment obligations may be accelerated.
additional long term debt													$ 15,000,000
Cerberus Business Finance LLC [Member] | Line of Credit [Member]
Line of Credit Facility, Maximum Borrowing Capacity						$ 5,000,000
Cerberus Business Finance LLC [Member] | Long-term Debt [Member]
Unamortized Debt Issuance Expense							3,578,000		3,578,000		$ 2,613,000
Long-term Debt						100,000,000
Interest Expense, Long-term Debt							$ 4,600,000		$ 11,700,000
Cerberus Business Finance LLC [Member] | Line of Credit [Member]
Line of Credit Facility, Maximum Borrowing Capacity						$ 5,000,000

STOCKHOLDERS' EQUITY Share-Ba_3

STOCKHOLDERS' EQUITY Share-Based Compensation (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Share-based Payment Arrangement, Expense	$ 2,045	$ 2,076	$ 5,788	$ 4,331
Cost of Products Revenues [Member]
Share-based Payment Arrangement, Expense	103	40	244	83
Cost of Services Revenues [Member]
Share-based Payment Arrangement, Expense	82	55	177	139
Research and Development Expense [Member]
Share-based Payment Arrangement, Expense	305	236	762	439
Selling and Marketing Expense [Member]
Share-based Payment Arrangement, Expense	532	419	1,276	1,152
General and Administrative Expense [Member]
Share-based Payment Arrangement, Expense	$ 1,023	$ 1,326	$ 3,329	$ 2,518
Share-based Payment Arrangement, Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	593,500		593,500		891,892
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price	$ 7.60		$ 7.60		$ 8.46
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures			0
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price			$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period			(66,506)
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price			$ 7.39
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period			(231,886)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price			$ 10.96
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term			1 year 4 months 13 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value	$ 0		$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number	593,500		593,500
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price	$ 7.60		$ 7.60
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term			1 year 4 months 13 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value	$ 0		$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Number	593,500		593,500
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price	$ 7.60		$ 7.60
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term			1 year 4 months 13 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Aggregate Intrinsic Value	$ 0		$ 0
Share-based Payment Arrangement, Option [Member] | Time-Based Vesting [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	593,500		593,500		891,892
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures			0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period			(66,506)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period			(231,886)
Share-based Payment Arrangement, Option [Member] | Performance-Based Vesting [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	0		0		0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures			0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period			0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period			0
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number	2,699,358		2,699,358		2,944,819
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value	$ 6.33		$ 6.33		$ 4.91
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Outstanding, Weighted Average Remaining Contractual Terms			1 year 1 month 13 days
Share-based Compensation Arrangement by Share-based Payment Award, Non-vested Restricted Stock Aggregate Intrinsic Value	$ 16,682		$ 16,682
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period			1,623,119
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value			$ 7.33
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period			(1,497,400)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value			$ 4.85
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period			(371,180)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value			$ 5.39
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Expected to Vest Number	2,699,358		2,699,358
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Expected To Vest Weighted Average Grant Date Fair Value	$ 6.33		$ 6.33
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Expected to Vest Weighted Average Remaining Contractual Term			1 year 1 month 13 days
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Expected To Vest Intrinsic Value	$ 16,682		$ 16,682
Restricted Stock Units (RSUs) [Member] | Time-Based Vesting [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number	2,145,093		2,145,093		1,978,676
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period			1,212,076
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period			(830,949)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period			(214,710)
Restricted Stock Units (RSUs) [Member] | Performance-Based Vesting [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number	554,265		554,265		966,143
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period			411,043
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period			(666,451)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period			(156,470)