Sonim (SONM) 10-Q 13 Aug 19 2019 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2019	Aug. 01, 2019
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q2
Trading Symbol	SONM
Entity Registrant Name	SONIM TECHNOLOGIES INC
Entity Central Index Key	0001178697
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Small Business	true
Entity Common Stock, Shares Outstanding		20,357,783
Entity Current Reporting Status	Yes
Entity Shell Company	false
Entity File Number	001-38907
Entity Address, State or Province	CA
Entity Address, Address Line One	1875 South Grant Street
Entity Address, Address Line Two	Suite 750
Entity Address, City or Town	San Mateo
Entity Tax Identification Number	943336783
Entity Address, Postal Zip Code	94402
City Area Code	650
Local Phone Number	378-8100

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Assets
Cash and cash equivalents	$ 15,694	$ 13,049
Accounts receivable, net	31,296	18,877
Inventory	26,495	21,831
Prepaid expenses and other current assets	9,484	10,111
Total current assets	82,969	63,868
Property and equipment, net	1,037	1,071
Other assets	1,907	2,406
Total assets	85,913	67,345
Liabilities and stockholders’ equity
Current portion of long-term debt	227	301
Accounts payable	18,972	27,295
Accrued expenses	17,325	16,381
Deferred revenue	305	4,223
Total current liabilities	36,829	48,200
Income tax payable	939	807
Long-term debt, less current portion	13,067	13,209
Total liabilities	50,835	62,216
Stockholders' equity
Common stock, $0.001 par value per share; 100,000,000 shares authorized: and 20,344,258 and 15,591,357 shares issued and outstanding at June 30, 2019 and December 31, 2018, respectively.	20	15
Additional paid-in capital	190,874	148,641
Accumulated deficit	(155,816)	(143,527)
Total stockholders’ equity	35,078	5,129
Total liabilities and stockholders’ equity	$ 85,913	$ 67,345

CONDENSED CONSOLIDATED BALANC_2

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (UNAUDITED) - $ / shares	Jun. 30, 2019	Dec. 31, 2018
Statement Of Financial Position [Abstract]
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	20,344,258	15,591,357
Common stock, shares outstanding	20,344,258	15,591,357

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Income Statement [Abstract]
Net revenues	$ 43,747	$ 31,450	$ 70,231	$ 49,640
Cost of revenues	28,937	20,910	46,041	33,837
Gross profit	14,810	10,540	24,190	15,803
Operating expenses:
Research and development	8,233	5,625	16,635	10,767
Sales and marketing	4,218	2,866	7,943	5,409
General and administrative	7,424	1,453	9,900	3,045
Total operating expenses	19,875	9,944	34,478	19,221
Income (loss) from operations	(5,065)	596	(10,288)	(3,418)
Interest expense	(555)	(472)	(977)	(879)
Other expense, net	(6)	(99)	(272)	(216)
Income (loss) before income taxes	(5,626)	25	(11,537)	(4,513)
Income tax expense	(457)	(148)	(752)	(681)
Net loss	(6,083)	(123)	(12,289)	(5,194)
Cumulative dividends on Series A, Series A-1 and Series A-2 preferred shares		(3,000)		(5,967)
Net loss attributable to common stockholders	$ (6,083)	$ (3,123)	$ (12,289)	$ (11,161)
Net loss per share attributable to common stockholders, basic and diluted	$ (0.34)	$ (3.01)	$ (0.73)	$ (10.78)
Weighted–average shares used in computing net loss per share attributable to common stockholders, basic and diluted	18,120,143	1,036,059	16,950,375	1,035,345

CONDENSED CONSOLIDATED STATEM_2

CONDENSED CONSOLIDATED STATEMENTS OF CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS' EQUITY (DEFICIT) (UNAUDITED) - USD ($) $ in Thousands	Total	Convertible Preferred Stock	Common Stock	Common StockIPO	Additional Paid-in Capital	Additional Paid-in CapitalIPO	Accumulated Deficit
Balance, shares at Dec. 31, 2017		11,906,783
Balance, beginning of period at Dec. 31, 2017		$ 80,397
Balance, beginning of period at Dec. 31, 2017			$ 1		$ 54,892		$ (144,804)
Balance, shares at Dec. 31, 2017			1,027,113
Exercise of stock options					11
Exercise of stock options, shares			9,977
Employee and nonemployee stock-based compensation					66
Net loss	$ (5,194)						(5,194)
Balance, shares at Jun. 30, 2018		11,906,783
Balance, at end of period at Jun. 30, 2018		$ 80,397
Balance, at end of period at Jun. 30, 2018	(95,028)		$ 1		54,969		(149,998)
Balance, shares at Jun. 30, 2018			1,037,090
Balance, shares at Dec. 31, 2017		11,906,783
Balance, beginning of period at Dec. 31, 2017		$ 80,397
Balance, beginning of period at Dec. 31, 2017			$ 1		54,892		(144,804)
Balance, shares at Dec. 31, 2017			1,027,113
Balance, at end of period at Dec. 31, 2018	5,129		$ 15		148,641		(143,527)
Balance, shares at Dec. 31, 2018			15,591,357
Balance, shares at Mar. 31, 2018		11,906,783
Balance, beginning of period at Mar. 31, 2018		$ 80,397
Balance, beginning of period at Mar. 31, 2018			$ 1		54,936		(149,875)
Balance, shares at Mar. 31, 2018			1,035,570
Exercise of stock options, shares			1,520
Employee and nonemployee stock-based compensation					33
Net loss	(123)						(123)
Balance, shares at Jun. 30, 2018		11,906,783
Balance, at end of period at Jun. 30, 2018		$ 80,397
Balance, at end of period at Jun. 30, 2018	(95,028)		$ 1		54,969		(149,998)
Balance, shares at Jun. 30, 2018			1,037,090
Balance, beginning of period at Dec. 31, 2018	$ 5,129		$ 15		148,641		(143,527)
Balance, shares at Dec. 31, 2018			15,591,357
Issuance of common stock, net of issuance costs			$ 1	$ 4	1,603	$ 36,845
Issuance of common stock, net of issuance costs, shares			227,628	4,297,901
Taxes paid on net issuance of restricted stock award					(1,897)
Exercise of stock options					55
Exercise of stock options, shares	72,034		72,034
Exercise of warrants					23
Exercise of warrants, shares			155,338
Employee and nonemployee stock-based compensation					5,604
Net loss	$ (12,289)						(12,289)
Balance, at end of period at Jun. 30, 2019	35,078		$ 20		190,874		(155,816)
Balance, shares at Jun. 30, 2019			20,344,258
Balance, beginning of period at Mar. 31, 2019			$ 16		150,332		(149,733)
Balance, shares at Mar. 31, 2019			15,873,705
Issuance of common stock, net of issuance costs				$ 4		$ 36,845
Issuance of common stock, net of issuance costs, shares				4,077,143
Net issuance of restricted stock award, shares			220,758
Taxes paid on net issuance of restricted stock award					(1,897)
Exercise of stock options					14
Exercise of stock options, shares			17,314
Exercise of warrants					23
Exercise of warrants, shares			155,338
Employee and nonemployee stock-based compensation					5,557
Net loss	(6,083)						(6,083)
Balance, at end of period at Jun. 30, 2019	$ 35,078		$ 20		$ 190,874		$ (155,816)
Balance, shares at Jun. 30, 2019			20,344,258

CONDENSED CONSOLIDATED STATEM_3

CONDENSED CONSOLIDATED STATEMENT OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Cash flows from operating activities:
Net loss	$ (12,289)	$ (5,194)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	1,075	831
Stock-based compensation	5,604	66
Trade-in guarantee	(268)
Noncash interest expense	50	556
Deferred income taxes	(11)	(9)
Changes in operating assets and liabilities:
Accounts receivable	(12,420)	(7,921)
Inventory	(4,664)	(4,930)
Prepaid expenses and other current assets	627	(4,770)
Other assets	(41)	(4)
Accounts payable	(9,868)	10,686
Accrued expenses	937	4,306
Deferred revenue	(3,649)	1,272
Income tax payable	133	224
Net cash used in operating activities	(34,784)	(4,887)
Cash flows from investing activities:
Purchase of property and equipment	(247)	(255)
Development of tooling and purchased software licenses	(244)	(1,233)
Net cash used in investing activities	(491)	(1,488)
Cash flows from financing activities:
Proceeds from borrowings on long-term debt		5,000
Proceeds on line of credit	5,614	45,566
Repayment on line of credit	(5,878)	(44,702)
Proceeds from issuance of common stock, net of costs	1,604
Proceeds from issuance of common stock upon IPO, net of costs	38,399
Taxes paid on net Issuance of restricted stock award	(1,897)
Cost associated with amendments to credit agreements		(48)
Proceeds from exercise of warrants	23
Proceeds from exercise of stock options	55	11
Net cash provided by financing activities	37,920	5,827
Net increase (decrease) in cash and cash equivalents	2,645	(548)
Cash and cash equivalents at beginning of period	13,049	1,581
Cash and cash equivalents at end of period	15,694	1,033
Supplemental disclosure of cash flow information:
Cash paid for interest	1,055	188
Cash paid for income taxes	352	61
Non-cash investing and financing activities:
Other assets included in accounts payable	1	$ 199
IPO issuance costs included in accounts payable	$ 1,550

The Company and its Significant

The Company and its Significant Accounting Policies	6 Months Ended
	Jun. 30, 2019
Company And Significant Accounting Policies [Abstract]
The Company and its significant accounting policies	NOTE 1 —The Company and its significant accounting policies Description of Business —Sonim Technologies, Inc. was incorporated in the state of Delaware on August 5, 1999 and is headquartered in San Mateo, California. The Company is a leading U.S. provider of ultra-rugged mobile phones and accessories designed specifically for task workers physically engaged in their work environments, often in mission-critical roles. Financial Statement Presentation —The accompanying unaudited interim condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the U.S. (“U.S. GAAP”) and pursuant to the rules and regulations of the Securities and Exchange Commission (the “SEC”) for interim financial information. The unaudited interim condensed consolidated financial statements, which reflect all adjustments (consisting of normal recurring items or items discussed herein) that management believes necessary to fairly state results of interim operations, should be read in conjunction with the Notes to Consolidated Financial Statements (including the Significant Accounting Policies and Recent Accounting Pronouncements) included in the Company’s audited consolidated financial statements for the year ended December 31, 2018, as filed with the SEC on Form S-1 (the “2018 Report”). Results of operations for interim periods are not necessarily indicative of annual results of operations. The unaudited condensed consolidated balance sheet at December 31, 2018 was extracted from the audited annual consolidated financial statements and does not include all disclosures required by U.S. GAAP for annual financial statements. Principles of Consolidation — The accompanying condensed consolidated financial statements include the accounts of Sonim Technologies. Inc. and its wholly-owned foreign subsidiaries, Sonim Technologies Spain SL, Sonim Technologies India Private Limited, Sonim Technologies (Shenzhen) Limited, Sonim Technologies (Hong Kong) Limited, and Sonim Communications India Private Limited (collectively, the “Company”). All significant intercompany transactions and balances have been eliminated in consolidation. Estimates —The preparation of condensed consolidated financial statements in accordance with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the condensed consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. These estimates include, but are not limited to, estimates related to revenue recognition; valuation assumptions regarding the determination of the fair value of common stock, as well as stock options and warrants; the useful lives of our long-lived assets; product warranties; loss contingencies; and the recognition and measurement of income tax assets and liabilities, including uncertain tax positions; The Company bases its estimates on historical experience and on various other assumptions that the Company believes to be reasonable under the circumstances. Actual results could differ from those estimates. Significant accounting policies — There have been no material changes in the accounting policies from those disclosed in the 2018 Report. Revenue Recognition — We recognize revenues primarily from the sale of products. We also enter into multiple-element agreements that include a combination of products and Non-Recurring Engineering (“NRE”) services. Revenues from the sale of our mobile phones and accessories is recognized when all of the following conditions are met per Accounting Standards Codification, or ASC, Topic 605, Revenue Recognition Terms of product sales are generally FOB destination. Revenue recognition also incorporates allowances for discounts, price protection, returns and customer incentives that can be reasonably estimated. In addition to cooperative marketing and other incentive programs, the Company has arrangements with some distributors, which allow for price protection and limited rights of return, generally through stock rotation programs. Under the price protection programs, the Company gives distributors credits for the difference between the original price paid and the Company’s then current price. Under the stock rotation programs, certain distributors are able to exchange certain products based on the number of qualified purchases made during the period. The Company monitors and tracks these programs and records a provision, at the time of the sale, for future payments or credits granted as reductions of revenue based on historical experience. Recorded revenues are reduced by these allowances. When revenue arrangements involve multiple elements, each element, referred to as a deliverable, is evaluated to determine whether it represents a separate unit of accounting in accordance with ASC 605-25, Revenue Recognition – Multiple-Element Arrangements. software that is essential to the functionality of the hardware, revenues are recognized according to the milestone method in accordance with the provisions of ASC Topic 605-35, Construction-Type and Production- Type Contract . Under this method, we recognize revenues from milestone payments when: (i) the milestone event is substantive and its achievability was not reasonably assured at the inception of the agreement, and (i) we do not have ongoing performance requirements related to the achievement of the milestone earned. Milestone payments are considered substantive if all of the following conditions are met: the milestone payment (i) is commensurate with either our performance to achieve the milestone or the enhancement of the value of the delivered item or items as a result of a specific outcome resulting from our performance to achieve the milestone, (ii) relates solely to past performance, and (iii) is reasonable relative to all of the deliverables and payment terms ( other potential milestone consideration) within the arrangement. If a milestone is deemed non-substantive, we defer, if applicable, and recognize such non-substantive milestones over the estimated period of performance applicable to each agreement on a straight-line basis, as appropriate. Reverse Stock Split —In November 2018, the Company’s stockholders approved a one-for-fifteen reverse stock split of its common and convertible preferred stock which was effected on November 2, 2018. The par value of the common stock and convertible preferred stock were not adjusted as a result of the reverse stock split. Accordingly, all share and per share amounts for the period presented in the consolidated financial statements and notes thereto have been adjusted retrospectively to reflect this reverse stock split. Initial Public Offering (“IPO”) —On May 14, 2019, the Company closed an initial public offering (“IPO’) in which the Company sold 3,571,429 shares of its common stock, at a price to the public of $11.00 per share. On May 22, 2019, the Company sold an additional 505,714 shares of common stock, and our Chief Executive Officer sold 30,000 shares of common stock, at a price to the public of $11.00 per share pursuant to the exercise of the underwriters’ option to purchase additional shares. The offer and sale of the shares in the IPO were registered under the Securities Act pursuant to a registration statement on Form S-1 (File No. 333-230887), which was declared effective by the SEC on May 9, 2019. The Company raised approximately $36,849 in net proceeds, after deducting underwriting discounts and commissions of $3,139 and offering expenses paid by us of approximately $4,861 . Offering costs, which consist of direct incremental legal, consulting, banking and accounting fees relating to the Company’s IPO, are offset against proceeds from the IPO within stockholders’ equity. As of December 31, 2018, there was $63 of deferred offering costs within other non-current assets on the condensed consolidated balance sheets. During the six months ended June 30, 2019, $4,861 in deferred offering costs were incurred, and charged to additional paid in capital. $1,550 issuance cost was unpaid and charged to accounts payable/accrued expenses as of June 30, 2019. New accounting pronouncements: Pronouncements adopted in 2018: The Company is an “emerging growth company,” as defined in Section 2(a) of the Securities Act, as modified by the Jumpstart Our Business Startups Act of 2012 (the “JOBS Act”), and it may take advantage of certain exemptions from various reporting requirements that are applicable to other public companies that are not emerging growth companies. Section 102(b)(1) of the JOBS Act exempts emerging growth companies from being required to comply with new or revised financial accounting standards until private companies (that is, those that have not had a Securities Act registration statement declared effective or do not have a class of securities registered under the Exchange Act) are required to comply with the new or revised financial accounting standards. The JOBS Act provides that an emerging growth company can elect to opt out of the extended transition period and comply with the requirements that apply to non-emerging growth companies but any such election to opt out is irrevocable. The Company has elected not to opt out of such extended transition period which means that when a standard is issued or revised and it has different application dates for public or private companies, the Company, as an emerging growth company, can adopt the new or revised standard at the time private companies adopt the new or revised standard. This may make comparison of the Company’s consolidated financial statements with another public company, which is neither an emerging growth company nor an emerging growth company that has opted out of using the extended transition period, difficult or impossible because of the potential differences in accounting standards used. In July 2017, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2017-11, Earnings Per Share (Topic 260), Distinguishing Liabilities from Equity (Topic 480) and Derivatives and Hedging (Topic 815): I. Accounting for Certain Financial Instruments with Down Round Features; II. Replacement of the Indefinite Deferral for Mandatorily Redeemable Financial Instruments of Certain Nonpublic Entities and Certain Mandatorily Redeemable Non-Controlling Interests with a Scope Exception. Distinguishing Liabilities from Equity Pronouncements not yet adopted: In August 2018, the FASB issued ASU 2018-13, Fair Value Measurement (Topic 820) Changes to the Disclosure Requirements for Fair Value Measurement In June 2018, the FASB issued ASU 2018-07, Compensation—Stock Compensation (Topic 718) In October 2016, the FASB issued ASU 2016-16 , Income Taxes—Intra-Entity Transfers of Assets Other Than Inventory In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows (Topic 230) Classification of Certain Cash Receipts and Cash Payments In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842), In January 2016, the FASB issued ASU 2016-01 , Financial Instruments—Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities In May 2014, the FASB, issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606), to The guidance permits two methods of adoption, the full retrospective method applying the standard to each prior reporting period presented, or the modified retrospective method with a cumulative effect of initially applying the guidance recognized at the date of initial application. The standard also allows entities to apply certain practical expedients at their discretion. We currently anticipate adopting the standard using the modified retrospective method with a cumulative adjustment and will provide additional disclosures comparing results to previous U.S. GAAP in our fiscal 2019 consolidated financial statements. We plan to apply the new revenue standards only to contracts not completed as of the date of initial application, referred to as open While the Company’s evaluation of the impact of this new guidance is not complete, we believe the impact of the new standard related to revenue recognition will not have a material impact on our consolidated financial statements other than potentially expanded disclosures. More judgements and estimates are required under Topic 606 than are required under Topic 605, including estimating the stand alone selling price (“SSP”) for each performance obligation identified within our arrangements with multiple elements and estimating the amount of variable considerations at inception of the arrangement. We will continue to evaluate sales incentives provided to our customers in order to determine the transaction price at inception of the This preliminary assessment is based on the revenue arrangements currently in place. The exact impact of ASC 606 will be dependent on facts and circumstances at adoption and could vary from quarter to quarter. New products or offerings, or changes to current offerings, may yield significantly different impacts than currently expected. Our conclusions will be reassessed periodically based on current facts and circumstances. We are also evaluating accounting systems, processes and internal controls over revenue recognition to assist us in the application of the new standard.

Fair Value Measurement

Fair Value Measurement	6 Months Ended
	Jun. 30, 2019
Fair Value Disclosures [Abstract]
Fair Value Measurement	NOTE 2 —Fair value measurement The fair value measurements standard establishes a framework for measuring fair value. That framework provides a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (level 1 measurements) and the lowest priority to unobservable inputs (level 3 measurements). The three levels of the fair value hierarchy under the standard are described Level 1—Inputs to the valuation methodology are unadjusted quoted prices for identical assets or liabilities in active markets that the Company has the ability to access. Level 2—Inputs to the valuation methodology include: • Quoted market prices for similar assets or liabilities in active • Quoted prices for identical or similar assets or liabilities in inactive • Inputs other than quoted prices that are observable for the asset or • Inputs that are derived principally from or corroborated by observable market data by If the asset or liability has a specified (contractual) term, the level 2 input must be observable for substantially the full term of the asset or liability. Level 3—Inputs to the valuation methodology are unobservable and significant to the fair value measurement. The asset’s or liability’s fair value measurement level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement. Valuation techniques used need to maximize the use of observable inputs and minimize the use of unobservable Following is a description of the valuation methodologies used for assets and liabilities measured at fair value. There have been no changes in the methodologies used at June 30, 2019 and 2018, and December 31, 2018. Money market funds are classified within level 1 of the fair value hierarchy because they are valued using quoted market prices. The warrant liability was classified within level 3 of the fair value hierarchy because there was no active market for the warrant or for similar warrants. The fair value of the Series A and Series B warrants at June 30, 2018, was estimated by first applying a weighting of the income approach and the market approach to determine the equity value of the Company. An Option-Pricing Method (“OPM”) was then used to allocate the total equity value of the Company to the different classes of equity according to their rights and preferences. As the Company was a private company at June 30, 2018, the fair value measurement was based on significant inputs that are not observable in the market thus represents Level 3 inputs. As of June 30, 2019, and December 31, 2018, as a result of the Company’s November 2018 stock conversion of preferred shares into common shares, all Series A and Series B warrants outstanding are now exercisable into common stock and are no longer required to be remeasured at fair value on a recurring Trade-in guarantee liability is classified within level 3 of the fair value hierarchy because the fair value measurement is based on inputs that are not observable in the market, including the probability and timing of a customer upgrading to a new device and the value of the upgraded device. The methods described above may produce a fair value calculation that may not be indicative of net realizable value or reflective of future fair values. Furthermore, while the Company believes its valuation methods are appropriate and consistent with other market participants, the use of different methodologies or assumptions to determine the fair value of certain financial instruments could result in a different fair value measurement at the reporting date. The following tables sets forth by level, within the fair value hierarchy, the Company’s assets and liabilities at fair value: June 30, 2019 Level 1 Level 2 Level 3 Total Assets: Money market funds * $ 13,250 $ — $ — $ 13,250 Liabilities: Trade-in Guarantee** $ — $ — $ — $ — December 31, 2018 Level 1 Level 2 Level 3 Total Assets: Money market funds * $ 11,006 $ — $ — $ 11,006 Liabilities: Trade-in Guarantee** $ — $ — $ 268 $ 268 * Included in cash and cash equivalents on the condensed consolidated balance ** Included in deferred revenue on the condensed consolidated balance sheets. The table below sets forth a summary of changes in the fair value of the Company’s level 3 liabilities for the six months ended June 30, 2019 and 2018: Warrant Trade-In Liability Guarantee Balance at January 1, 2019 $ — $ 268 Recognition of revenue — (268 ) Balance at June 30, 2019 $ — $ — Balance at January 1, 2018 $ 3,785 $ 805 Recognition of revenue — — Change in fair value — — Balance at June 30, 2018 $ 3,785 $ 805

Inventory

Inventory	6 Months Ended
	Jun. 30, 2019
Inventory Disclosure [Abstract]
Inventory	NOTE 3 —Inventory Inventory consisted of the following: June 30, 2019 December 31, 2018 Devices - for resale $ 15,272 $ 11,319 Work in process 3,719 — Raw materials 5,470 8,826 Accessories 2,034 1,686 $ 26,495 $ 21,831

Warranty Liability

Warranty Liability	6 Months Ended
	Jun. 30, 2019
Guarantees And Product Warranties [Abstract]
Warranty Liability	NOTE 4 —Warranty Liability The table below sets forth the activity in the warranty liability, which is included in accrued expenses on the condensed consolidated balance sheets for the six months ended June 30, 2019 and 2018: Balance, January 1, 2019 $ 1,103 Additions 874 Cost of warranty claims (552 ) Balance, June 30, 2019 $ 1,425 Balance, January 1, 2018 $ 1,742 Additions 387 Cost of warranty claims (569 ) Balance, June 30, 2018 $ 1,560

Borrowings

Borrowings	6 Months Ended
	Jun. 30, 2019
Debt Disclosure [Abstract]
Borrowings	NOTE 5 —Borrowings Senior Credit Agreement The Company has a loan and security agreement (“the EWB Loan Agreement”) with East West Bank (the “Senior Lender”). The maximum borrowings available under the line of credit is $8,000 and will bear interest at 1% plus the Prime Rate with a maturity date of November 2019. As of both June 30, 2019 and December 31, 2018, the Company had remaining borrowing capacity of $8,000 against the line of credit. Long-Term Debt Riley Loan — On October 26, 2017 (the “Effective Date”), the Company entered into a Subordinated Term Loan and Security agreement (the “Riley Loan Agreement”) with B. Riley Principal Investments, LLC (“BRPI”), an affiliate of B. Riley Financial, Inc., a shareholder of the Company. Under the original Riley Loan Agreement, the Company could borrow principal up to $10,000 via a subordinated secured convertible promissory note (the “Convertible Note”), with an optional conversion feature as described below. During the year ended December 31, 2018, the Company amended the Riley Loan Agreement to increase the available aggregate principal borrowings to $12,000. The 2018 amendments did not change the terms of the original Riley Loan Agreement other than to provide a waiver of the defined prepayment penalties if any repayment does not reduce the principal amount outstanding below $10,000. The Riley Loan Agreement, as amended, matures on September 1, 2022 (the “Maturity Date”) and carries a stated interest rate of 10% and provided that the first year of interest be compounded into the principal on October 26, 2018, with interest-only payments beginning thereafter. As of both June 30, 2019 and December 31, 2018, the total outstanding borrowings under the Riley Loan Agreement, as amended, was Optional Conversion — On November 2, 2018, in conjunction with the Company’s conversion of all of its outstanding shares of preferred stock into shares of common stock (See Note 6) and the 15-to-1 reverse stock split, the Company amended the optional conversion terms of its existing Convertible Note. As amended, the Convertible Note provides that at any time, on or prior to the Maturity Date, BRPI may elect to convert principal amounts outstanding, including accrued interest, as limited below, into shares of common stock at $8.87 per share. The number of shares of common stock to be issued upon conversion is limited to the sum of (A) the lesser of (i) the principal outstanding and (ii) the aggregate principal amount borrowed under the Riley Loan Agreement to date multiplied by the Designated Percentage as described below, and (B) accrued interest. The “Designated Percentage” is one hundred percent (100%) if the conversion date is prior to the first anniversary of the Effective Date, seventy-five percent (75%) in Year 2 of the Riley Loan Agreement, fifty percent (50%) in Year 3, twenty-five percent (25%) in Year 4, and twelve and a half of percent (12.5%) in the final year of the Riley Loan Agreement on or prior to the Maturity Date. Promissory Notes Payable —In 2014 and 2017, the Company entered into agreements with one of its suppliers, whereby certain of its trade payables for royalties and royalty up-front payments were converted to payment plans. In December 2018, the Company amended its accounts payable financing agreements, effective January 1, 2019, which provides for the $736 outstanding balance to be paid in twenty equal quarterly installments. The amounts due under these agreements would be paid in quarterly installments over periods from two to four years, with interest ranging up to 8%. Remaining balances are $582 and $718 at June 30, 2019 and December 31, 2018, respectively. Other Financing Arrangements —In 2017, the Company entered into three financing arrangements totaling approximately $472 with remaining maturity dates of June 2020 and August 2020. As of June 30, 2019, and December 31, 2018, the remaining balances were $99 and $238, respectively. Future aggregate annual principal payment on all long-term debt, excluding the discount of $388, are as follows for the next 5 years as of June 30, 2019: Year Ending, December 31 st Remainder of 2019 $ 111 2020 202 2021 144 2022 13,145 2023 80 $ 13,682

Convertible Preferred Stock and

Convertible Preferred Stock and Stockholders' Equity	6 Months Ended
	Jun. 30, 2019
Equity [Abstract]
Convertible Preferred Stock and Stockholders' Equity	NOTE 6 —Convertible Preferred Stock And Stockholders’ Equity Under the Company’s Amended and Restated Certificate of Incorporation dated October 23, 2017, the authorized capital stock of the Company consisted of 33,853,333 shares of capital stock (par value of $0.001 per share), comprising 18,666,666 shares of common stock and 15,186,664 shares of convertible preferred stock, of which 1,266,666 shares were designated as Series A-3, 1,186,666 shares were designated as Series A-2 convertible preferred stock (“Series A-2”), 1,733,333 shares were designated as Series A-1 convertible preferred stock (“Series A-1”), 9,333,333 shares were designated as Series A, and 1,666,666 shares have been designated as Series B convertible preferred stock (“Series B”). On November 2, 2018, the Company amended and restated its previous certificate of incorporation and adjusted its authorized capital stock (par value of $.001) to consist of 100,000,000 shares of common stock and 5,000,000 shares of preferred stock. Each outstanding share of common stock entitles the holder to one vote of each matter properly submitted to the stockholders of the Company for vote. During the six months ended June 30, 2019, no shares of preferred have been issued. On November 1, 2018, the Company converted all outstanding shares of Series A, Series A-1, Series A-2 and Series B into shares of common stock. Prior to this conversion, the Company also approved the payment of dividends to all holders of Series A, Series A-1 and Series A-2 of record on this date. The value of the dividends of $6,539 were determined in accordance with the terms of the Amended and Restated Certificate of Incorporation dated October 23, 2017 based on the stated dividend rate per respective Series. The total Series A, Series A-1 and Series A-2 shares issued as dividends in the year ended December 31, 2018 was 944,694, 66,255 and 49,456, respectively. The dividends of $10,152 were recorded at fair value as of the date of Board approval. The total outstanding preferred shares of 13,277,864, inclusive of historical shares issued as dividends, were converted into common stock. On November 2, 2018, the Company entered into a Securities Purchase Agreement for the sale of 2,089,136 shares of common stock, under which 1,270,905 shares of common stock were sold as of December 31, 2018, at $7.18 per share for net proceeds of approximately $8,295. Issuance cost approximating $831 were incurred and netted against the proceeds within the condensed consolidated statements of stockholder’s equity (deficit). The Company sold an additional 227,628 shares of common stock for net proceeds of $1,604, incurring issuance cost of $30 and were netted against the proceeds within the condensed consolidated statements of stockholder’s equity (deficit) in January 2019. On April 24, 2019, the Company issued 10,000 shares of common stock to a former employee in exchange for a release of claims and other agreements.

Warrants

Warrants	6 Months Ended
	Jun. 30, 2019
Warrants [Abstract]
Warrants	NOTE 7 —Warrants There were 155,338 warrants exercised on May 10, 2019 for total cash proceeds of $23. The following table discloses warrants issued and outstanding as of June 30, 2019 and December 31, 2018: June 30, 2019 Number of Exercise warrant Year of Issuance date price shares expiration Common November 2012 $ 6.00 7 2028 November 2012 $ 6.00 927 2020 November 2012 $ 14.50 22 2028 Total warrants 956 December 31, 2018 Number of Exercise warrant Year of Issuance date price shares expiration Common November 2012 $ 6.00 7 2028 November 2012 $ 6.00 927 2020 November 2012 $ 14.50 22 2028 August 2016 $ 0.15 155,338 2023 Total warrants 156,294

Stock-based Compensation

Stock-based Compensation	6 Months Ended
	Jun. 30, 2019
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Stock-based Compensation	NOTE 8 —Stock-based Compensation As of June 30, 2019, the Company had the 2012 Equity Incentive Plan (the “2012 Option Plan”), and 2019 Equity Incentive Plan (the “2019 Option Plan”) in place. As of June 30, 2019, the number of shares available to be issued under the 2012 Option Plan and 2019 Option Plan were zero and 1,885,039 respectively. The Option Plan provides for the grant of incentive and nonstatutory stock options (“Options”), stock appreciation rights (“SAR”), restricted stock awards (“RSA”), and restricted stock unit awards (“RSU”) to employees, nonemployee directors, and consultants of the Company. Awards granted under the Option Plan generally become exercisable ratably over a two-year or four-year period following the date of grant and expire ten years from the date of grant. At the discretion of the Company’s Board of Directors, certain awards may be exercisable immediately at the date of grant but are subject to a repurchase right, under which the Company may buy back any unvested shares at their original exercise price in the event of an employee’s termination prior to full vesting. All other awards are exercisable only to the extent vested. At June 30, 2019 and December 31, 2018, there were no shares that had been early exercised that were subject to the Company’s repurchase right at that date. The exercise price or strike price for Options and SARs granted under the Option Plan must generally be at least equal to 100% of the fair value of the Company’s common stock at the date of grant, as determined by the Board of Directors. The exercise price of incentive stock options granted under the Option Plan to ten percent or greater stockholders must be at least equal to 110% of the fair value of the Company’s common stock at the date of grant, as determined by the Board of Directors, and are not exercisable after five years from the date of grant. The Company’s board of directors adopted, and its stockholders approved, the 2019 Employee Stock Purchase Plan and the 2019 Equity Incentive Plan in March 2019 and April 2019, respectively, each of which became effective in connection with the IPO. There are Plan. Additionally, the number of shares of common stock reserved for issuance under the 2019 Employee Stock Purchase Plan will automatically increase on January 1 of each calendar year for 10 years, starting January 1, 2020, and ending on, and including, January 1, 2029, in an amount equal to the lesser of 1% of the total number of shares of capital stock outstanding on December 31 st As of June 30, 2019, no shares have been issued under the 2019 Employee Stock Purchase Plan. On April 10, 2019, the Company granted an aggregate of 128,000 restricted stock units to the Company’s executives which remain unvested as of June 30, 2019. On May 13, 2019, the Company granted a fully vested restricted stock award of 383,197 shares, and issued 210,758 net shares of common stock after withholding 172,439 shares of common stock to satisfy tax obligations associated with the grant, to the Company’s Chief Executive Officer as a bonus pursuant to his employment agreement. As a result, the Company recorded $4,215 as compensation expense to operating expenses under the Statement of Operations during the three months ended June 30, 2019. In connection with the IPO, the Company accelerated vesting of 201,666 options dated September 10, 2018, pursuant to the employment agreement of the Company’s Chief Financial Officer. As a result, the Company recorded $287 as compensation expense to operating expenses under the Statement of Operations during the three months ended June 30, 2019. Stock-based compensation expense for the three and six months ended June 30, 2019 and 2018 is as follows: Three Months Ended Six Months Ended June 30 June 30 2019 2018 2019 2018 Research and development $ 172 $ 6 $ 175 $ 11 Sales and marketing 467 9 478 17 General and administrative 4,899 14 4,931 29 Cost of revenues 19 4 20 9 $ 5,557 $ 33 $ 5,604 $ 66 Stock Options: Stock option activity for the six months ended June 30, 2019 is as follows: Weighted average Weighted average remaining Aggregate exercise price contractual life Intrinsic Options per share (in years) Value Outstanding at January 1, 2019 1,320,197 $ 0.77 7.99 $ 8,465 Options granted 637,213 $ 10.94 Options exercised (72,034 ) $ 0.77 Options forfeited (66,084 ) $ 1.53 Options cancelled — $ — Outstanding at June 30, 2019 1,819,292 $ 4.30 8.24 $ 15,331 Vested and expected to vest at June 30, 2019 1,819,292 $ 4.30 8.24 $ 15,331 Vested at June 30, 2019 1,115,256 $ 2.84 7.58 $ 11,026 As of June 30, 2019, there was approximately $2,700 of unamortized stock-based compensation cost related to unvested stock options, which is expected to be recognized over a weighted average period of three years.

Income Taxes

Income Taxes	6 Months Ended
	Jun. 30, 2019
Income Tax Disclosure [Abstract]
Income Taxes	NOTE 9 —Income Taxes In determining quarterly provisions for income taxes, the Company uses the annual estimated effective tax rate applied to the actual year-to-date profit or loss, adjusted for discrete items arising in that quarter. The Company’s annual estimated effective tax rate differs from the U.S. federal statutory rate primarily as a result of state taxes, foreign taxes, and changes in the Company’s valuation allowance against its deferred tax assets. For the three months ended June 30, 2019 and 2018, the Company recorded provisions for income taxes of $457 and 148, respectively. For the six months ended June 30, 2019 and 2018, the Company recorded provisions for income taxes of $752, and $681, respectively. On December 22, 2017, President Trump signed into law the Tax Cuts and Jobs Act (the Tax Act), which significantly changes existing U.S. tax laws, including a reduction in the corporate tax rate from 35% to 21%, and move from a worldwide tax system to a territorial system, as well as other changes. The tax rate reduction was effective January 1, 2018. Beginning in 2018, the Company became subject to the global intangible low-taxed income (GILTI) provisions of the Tax Act on the income of the Company’s foreign subsidiaries. The Company’s foreign subsidiaries are profitable for the three and six months ended June 30, 2019 and forecast profits for all of 2019. The GILTI subjects the income of the foreign subsidiaries to U.S. taxation. The Company’s accounting policy related to the GILTI is to treat GILTI related book/tax differences as period costs and to use the incremental cash tax savings approach in evaluating the Company’s U.S. net operating loss valuation allowance assessment. The Company's income tax returns are subject to examinations by the Internal Revenue Service and other tax authorities in various jurisdictions. In accordance with the guidance on the accounting for uncertainty in income taxes, the Company regularly assesses the likelihood of adverse outcomes resulting from these examinations to determine the adequacy of its provision for income taxes. These assessments can require considerable estimates and judgments. The gross amount of unrecognized tax benefits was approximately $6,000 as of June 30, 2019. Our unrecognized tax benefits that, if recognized, would reduce the effective income tax rate in future periods totalled $700 as of June 30, 2019. If the Company's estimate of income tax liabilities proves to be less than the ultimate assessment, then a further charge to expense would be required. If events occur and the payment of these amounts ultimately proves to be unnecessary, the reversal of the liabilities would result in tax benefits being recognized in the period when the Company determines the liabilities are no longer necessary. The Company does not anticipate any material changes to its uncertain tax positions during the next twelve months.

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2019
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	NOTE 10 —Commitments and Contingencies Royalty payments —The Company is required to pay per unit royalties to wireless essential patent holders and other providers of integrated technologies on mobile devices delivered, which, in aggregate, amount to less than 5% of net revenues associated with each unit, and expire in 2021 and 2023. Royalty expense for the three months ended June 30, 2019 and 2018 was $1,247 and $619, respectively. Royalty expense for the six months ended June 30, 2019 and 2018 was $1,698 and $1,029, respectively, which are included in cost of revenues on the condensed consolidated statements of operations. General litigation —The Company is involved in lawsuits, claims, investigation, and proceedings that arise in the ordinary course of business. The Company records a provision for a liability when management believes that it is both probable that a liability has been incurred and the amount of the loss can be reasonably estimated. The Company reviews these provisions at least quarterly and adjusts them to reflect the impact of negotiations, settlements, rulings, advice of legal counsel, and other information and events pertaining to a particular case. Based on its experience, the Company believes that any settled amounts is not a meaningful indicator of the Company’s potential liability pertaining to litigation matters. The Company believes that it has valid defenses with respect to legal matters pending against it. Nevertheless, it is possible that cash flows or results of operations could be materially affected in any particular period by the unfavorable resolution of one or more of these contingencies. Indemnification —Under the terms of its agreements with wireless carriers and other partners, the Company has agreed to provide indemnification for intellectual property infringement claims related to Company’s product sold by them to their end customers. From time to time, the Company receives notices from these wireless carriers and other partners of a claim for infringement of intellectual property rights potentially related to their products. These infringement claims have been settled, dismissed, have not been further pursued by the customers, or are pending for further action by the Company. Contingent severance obligations —The Company has agreements in place with certain key employees guaranteeing severance payments under certain circumstances. Generally, in the event of termination by the Company without cause, termination due to death or disability, or resignation for good reason, the Company is obligated to the pay the employees: (i) any time before a Change in Control, amounts up to $1,057 or (ii) if at any time within 12 months of a Change in Control, amounts up to $1,407. In addition, in the event of termination by the Company with cause, the Company is obligated to pay the employees up to $88. As of June 30, 2019 and December 31, 2018, no accrual has been recorded.

Related Party Transactions

Related Party Transactions	6 Months Ended
	Jun. 30, 2019
Related Party Transactions [Abstract]
Related Party Transactions	NOTE 11 —Related Party Transactions Revenue transactions with a certain investor —During the three and six months ended June 30, 2018, the Company recognized revenue of $797 and zero, respectively, with an investor and holder of the August 2016 Series A warrants which were amended to common stock warrants in conjunction with the November 2018 preferred stock conversion event. The Company did not recognize any revenue with this investor during the six months ended June 30, 2019. Management Services Agreement— In October 2017, the Company entered into a management services agreement with B. Riley Principal Investments, an investor, pursuant to which B. Riley Investments agreed to provide advisory and consulting services to the Company. The Company incurred approximately $6 and $50 in related consulting fees in each of the three months ended June 30, 2019 and 2018, respectively. The Company incurred approximately $56 and $100 in related consulting fees during the six months ended June 30, 2019 and 2018, respectively. At the closing of the Company’s IPO, the management services agreement was terminated in accordance with its terms.

Net Loss Per Share Attributable

Net Loss Per Share Attributable to Common Stockholders	6 Months Ended
	Jun. 30, 2019
Earnings Per Share [Abstract]
Net Loss Per Share Attributable to Common Stockholders	NOTE 12 — Net loss per share attributable to common stockholders for the three and six months ended June 30, 2019 and 2018 was determined by increasing Net l Three Months Ended Six Months Ended June 30 June 30 2019 2018 2019 2018 Numerator: Net loss allocable to common stockholders $ (6,083 ) $ (3,123 ) $ (12,289 ) $ (11,161 ) Denominator: Weighted-average shares used in computing net loss per share, basic and diluted 18,120,143 1,036,059 16,950,375 1,035,345 Net loss per share, basic and diluted $ (0.34 ) $ (3.01 ) $ (0.73 ) $ (10.78 ) The potentially dilutive common shares that were excluded from the calculation of diluted net loss per share because their effect would have been antidilutive for the three and six months ended June 30, 2019 and 2018, respectively, are presented are as follows: Three Months Ended Six Months Ended June 30 June 30 2019 2018 2019 2018 Shares of convertible preferred stock — 11,906,783 — 11,906,783 Shares subject to options to purchase common stock 1,819,292 1,037,618 1,819,292 1,037,618 Unvested restricted stock units 128,000 — 128,000 — Shares subject to warrants to purchase convertible preferred stock — — — 156,294 Shares subject to warrants to purchase common stock 956 156,294 956 — Shares subject to term debt optional conversion into convertible preferred stock — 1,422,865 — 1,422,865 Shares subject to term debt optional conversion into common stock 1,099,278 — 1,099,278 — Total 3,047,526 14,523,560 3,047,526 14,523,560

Entity Level Information

Entity Level Information	6 Months Ended
	Jun. 30, 2019
Segment Reporting [Abstract]
Entity Level Information	NOTE 13 —Entity Level Information Segment Information —The Company operates in one reporting segment. Operating segments are defined as components of an enterprise about which separate financial information is evaluated regularly by the chief operating decision maker, who is the chief executive officer, in deciding how to allocate resources and assessing performance. The Company’s chief operating decision maker allocates resources and assesses performance based upon discrete financial information at the consolidated level. The following table summarizes the revenue by region based on ship-to destinations for the three and six months ended June 30, 2019 and 2018: Three Months Ended Six Months Ended June 30 June 30 2019 2018 2019 2018 U.S $ 35,125 $ 24,128 $ 55,232 $ 36,553 Canada and Latin America 5,662 4,380 9,290 6,632 Europe and Middle East 2,210 2,923 4,010 6,086 Asia Pacific 750 19 1,699 369 $ 43,747 $ 31,450 $ 70,231 $ 49,640 Long-lived assets located in the United States and Asia Pacific region were $1,397 and $510 and $2,013 and $393 as of June 30, 2019 and December 31, 2018, respectively. The composition of revenues for the three and six months ended June 30, 2019 and 2018 is follows: Three Months Ended Six Months Ended June 30 June 30 2019 2018 2019 2018 Product Sales $ 43,609 $ 31,017 $ 69,941 $ 47,984 Services 138 433 290 1,656 Total revenues $ 43,747 $ 31,450 $ 70,231 $ 49,640 Concentrations of Credit Risk —The Company’s product revenues are concentrated in the technology industry , which is highly competitive and rapidly changing. Significant technological changes in the industry or customer requirements, or the emergence of competitive products with new capabilities or technologies, could adversely affect the Company’s consolidated operating results. Financial instruments that potentially subject the Company to credit risk consist primarily of cash and cash equivalents and accounts receivable. Cash and cash equivalents are deposited with high-quality, federally insured commercial banks in the United States and cash balances are in excess of federal insurance limits at June 30, 2019 and December 31, 2018. The Company generally does not require collateral or other security in support of accounts receivable. To reduce credit risk, management performs ongoing credit evaluations of its customers’ financial condition. The Company analyzes the need for reserves for potential credit losses and records allowances for doubtful accounts when necessary. The Company had allowances for such losses totaling approximately $7 and $11 at June 30, 2019 and December 31, 2018, respectively. Receivables from three customers approximated 46%, 37%, and 6% at June 30, 2019, and two customers approximated 44% and 43% of total accounts receivable at December 31, 2018. Revenue from customers with concentration greater than 10% in the three and six months ended June 30, 2019 and 2018 accounted for approximately the following percentage of total revenues: Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 Customer A 32% 23% 34% 15% Customer B * * * 16% Customer C 25% * 20% * Customer D * 10% * 12% Customer E 10% 39% * 28% * Customer revenue did not exceed 10% in the respective

Subsequent Events

Subsequent Events	6 Months Ended
	Jun. 30, 2019
Subsequent Events [Abstract]
Subsequent Events	NOTE 14 —SUBSEQUENT EVENTS The Company repaid $3,250, or 25%, of the principal amount under the Riley Loan Agreement.

The Company and its Significa_2

The Company and its Significant Accounting Policies (Policies)	6 Months Ended
	Jun. 30, 2019
Company And Significant Accounting Policies [Abstract]
Description of Business	Description of Business —Sonim Technologies, Inc. was incorporated in the state of Delaware on August 5, 1999 and is headquartered in San Mateo, California. The Company is a leading U.S. provider of ultra-rugged mobile phones and accessories designed specifically for task workers physically engaged in their work environments, often in mission-critical roles.
Financial Statement Presentation	Financial Statement Presentation —The accompanying unaudited interim condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the U.S. (“U.S. GAAP”) and pursuant to the rules and regulations of the Securities and Exchange Commission (the “SEC”) for interim financial information. The unaudited interim condensed consolidated financial statements, which reflect all adjustments (consisting of normal recurring items or items discussed herein) that management believes necessary to fairly state results of interim operations, should be read in conjunction with the Notes to Consolidated Financial Statements (including the Significant Accounting Policies and Recent Accounting Pronouncements) included in the Company’s audited consolidated financial statements for the year ended December 31, 2018, as filed with the SEC on Form S-1 (the “2018 Report”). Results of operations for interim periods are not necessarily indicative of annual results of operations. The unaudited condensed consolidated balance sheet at December 31, 2018 was extracted from the audited annual consolidated financial statements and does not include all disclosures required by U.S. GAAP for annual financial statements.
Principles of Consolidation	Principles of Consolidation — The accompanying condensed consolidated financial statements include the accounts of Sonim Technologies. Inc. and its wholly-owned foreign subsidiaries, Sonim Technologies Spain SL, Sonim Technologies India Private Limited, Sonim Technologies (Shenzhen) Limited, Sonim Technologies (Hong Kong) Limited, and Sonim Communications India Private Limited (collectively, the “Company”). All significant intercompany transactions and balances have been eliminated in consolidation.
Estimates	Estimates —The preparation of condensed consolidated financial statements in accordance with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the condensed consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. These estimates include, but are not limited to, estimates related to revenue recognition; valuation assumptions regarding the determination of the fair value of common stock, as well as stock options and warrants; the useful lives of our long-lived assets; product warranties; loss contingencies; and the recognition and measurement of income tax assets and liabilities, including uncertain tax positions; The Company bases its estimates on historical experience and on various other assumptions that the Company believes to be reasonable under the circumstances. Actual results could differ from those estimates.
Significant accounting policies	Significant accounting policies — There have been no material changes in the accounting policies from those disclosed in the 2018 Report.
Revenue Recognition	Revenue Recognition — We recognize revenues primarily from the sale of products. We also enter into multiple-element agreements that include a combination of products and Non-Recurring Engineering (“NRE”) services. Revenues from the sale of our mobile phones and accessories is recognized when all of the following conditions are met per Accounting Standards Codification, or ASC, Topic 605, Revenue Recognition Terms of product sales are generally FOB destination. Revenue recognition also incorporates allowances for discounts, price protection, returns and customer incentives that can be reasonably estimated. In addition to cooperative marketing and other incentive programs, the Company has arrangements with some distributors, which allow for price protection and limited rights of return, generally through stock rotation programs. Under the price protection programs, the Company gives distributors credits for the difference between the original price paid and the Company’s then current price. Under the stock rotation programs, certain distributors are able to exchange certain products based on the number of qualified purchases made during the period. The Company monitors and tracks these programs and records a provision, at the time of the sale, for future payments or credits granted as reductions of revenue based on historical experience. Recorded revenues are reduced by these allowances. When revenue arrangements involve multiple elements, each element, referred to as a deliverable, is evaluated to determine whether it represents a separate unit of accounting in accordance with ASC 605-25, Revenue Recognition – Multiple-Element Arrangements. software that is essential to the functionality of the hardware, revenues are recognized according to the milestone method in accordance with the provisions of ASC Topic 605-35, Construction-Type and Production- Type Contract . Under this method, we recognize revenues from milestone payments when: (i) the milestone event is substantive and its achievability was not reasonably assured at the inception of the agreement, and (i) we do not have ongoing performance requirements related to the achievement of the milestone earned. Milestone payments are considered substantive if all of the following conditions are met: the milestone payment (i) is commensurate with either our performance to achieve the milestone or the enhancement of the value of the delivered item or items as a result of a specific outcome resulting from our performance to achieve the milestone, (ii) relates solely to past performance, and (iii) is reasonable relative to all of the deliverables and payment terms ( other potential milestone consideration) within the arrangement. If a milestone is deemed non-substantive, we defer, if applicable, and recognize such non-substantive milestones over the estimated period of performance applicable to each agreement on a straight-line basis, as appropriate.
Reverse Stock Split	Reverse Stock Split —In November 2018, the Company’s stockholders approved a one-for-fifteen reverse stock split of its common and convertible preferred stock which was effected on November 2, 2018. The par value of the common stock and convertible preferred stock were not adjusted as a result of the reverse stock split. Accordingly, all share and per share amounts for the period presented in the consolidated financial statements and notes thereto have been adjusted retrospectively to reflect this reverse stock split.
Initial Public Offering (“IPO”)	Initial Public Offering (“IPO”) —On May 14, 2019, the Company closed an initial public offering (“IPO’) in which the Company sold 3,571,429 shares of its common stock, at a price to the public of $11.00 per share. On May 22, 2019, the Company sold an additional 505,714 shares of common stock, and our Chief Executive Officer sold 30,000 shares of common stock, at a price to the public of $11.00 per share pursuant to the exercise of the underwriters’ option to purchase additional shares. The offer and sale of the shares in the IPO were registered under the Securities Act pursuant to a registration statement on Form S-1 (File No. 333-230887), which was declared effective by the SEC on May 9, 2019. The Company raised approximately $36,849 in net proceeds, after deducting underwriting discounts and commissions of $3,139 and offering expenses paid by us of approximately $4,861 . Offering costs, which consist of direct incremental legal, consulting, banking and accounting fees relating to the Company’s IPO, are offset against proceeds from the IPO within stockholders’ equity. As of December 31, 2018, there was $63 of deferred offering costs within other non-current assets on the condensed consolidated balance sheets. During the six months ended June 30, 2019, $4,861 in deferred offering costs were incurred, and charged to additional paid in capital. $1,550 issuance cost was unpaid and charged to accounts payable/accrued expenses as of June 30, 2019.
New accounting pronouncements	New accounting pronouncements: Pronouncements adopted in 2018: The Company is an “emerging growth company,” as defined in Section 2(a) of the Securities Act, as modified by the Jumpstart Our Business Startups Act of 2012 (the “JOBS Act”), and it may take advantage of certain exemptions from various reporting requirements that are applicable to other public companies that are not emerging growth companies. Section 102(b)(1) of the JOBS Act exempts emerging growth companies from being required to comply with new or revised financial accounting standards until private companies (that is, those that have not had a Securities Act registration statement declared effective or do not have a class of securities registered under the Exchange Act) are required to comply with the new or revised financial accounting standards. The JOBS Act provides that an emerging growth company can elect to opt out of the extended transition period and comply with the requirements that apply to non-emerging growth companies but any such election to opt out is irrevocable. The Company has elected not to opt out of such extended transition period which means that when a standard is issued or revised and it has different application dates for public or private companies, the Company, as an emerging growth company, can adopt the new or revised standard at the time private companies adopt the new or revised standard. This may make comparison of the Company’s consolidated financial statements with another public company, which is neither an emerging growth company nor an emerging growth company that has opted out of using the extended transition period, difficult or impossible because of the potential differences in accounting standards used. In July 2017, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2017-11, Earnings Per Share (Topic 260), Distinguishing Liabilities from Equity (Topic 480) and Derivatives and Hedging (Topic 815): I. Accounting for Certain Financial Instruments with Down Round Features; II. Replacement of the Indefinite Deferral for Mandatorily Redeemable Financial Instruments of Certain Nonpublic Entities and Certain Mandatorily Redeemable Non-Controlling Interests with a Scope Exception. Distinguishing Liabilities from Equity Pronouncements not yet adopted: In August 2018, the FASB issued ASU 2018-13, Fair Value Measurement (Topic 820) Changes to the Disclosure Requirements for Fair Value Measurement In June 2018, the FASB issued ASU 2018-07, Compensation—Stock Compensation (Topic 718) In October 2016, the FASB issued ASU 2016-16 , Income Taxes—Intra-Entity Transfers of Assets Other Than Inventory In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows (Topic 230) Classification of Certain Cash Receipts and Cash Payments In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842), In January 2016, the FASB issued ASU 2016-01 , Financial Instruments—Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities In May 2014, the FASB, issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606), to The guidance permits two methods of adoption, the full retrospective method applying the standard to each prior reporting period presented, or the modified retrospective method with a cumulative effect of initially applying the guidance recognized at the date of initial application. The standard also allows entities to apply certain practical expedients at their discretion. We currently anticipate adopting the standard using the modified retrospective method with a cumulative adjustment and will provide additional disclosures comparing results to previous U.S. GAAP in our fiscal 2019 consolidated financial statements. We plan to apply the new revenue standards only to contracts not completed as of the date of initial application, referred to as open While the Company’s evaluation of the impact of this new guidance is not complete, we believe the impact of the new standard related to revenue recognition will not have a material impact on our consolidated financial statements other than potentially expanded disclosures. More judgements and estimates are required under Topic 606 than are required under Topic 605, including estimating the stand alone selling price (“SSP”) for each performance obligation identified within our arrangements with multiple elements and estimating the amount of variable considerations at inception of the arrangement. We will continue to evaluate sales incentives provided to our customers in order to determine the transaction price at inception of the This preliminary assessment is based on the revenue arrangements currently in place. The exact impact of ASC 606 will be dependent on facts and circumstances at adoption and could vary from quarter to quarter. New products or offerings, or changes to current offerings, may yield significantly different impacts than currently expected. Our conclusions will be reassessed periodically based on current facts and circumstances. We are also evaluating accounting systems, processes and internal controls over revenue recognition to assist us in the application of the new standard.

Fair Value Measurement (Tables)

Fair Value Measurement (Tables)	6 Months Ended
	Jun. 30, 2019
Fair Value Disclosures [Abstract]
Summary of Fair Value Assets and Liabilities	The following tables sets forth by level, within the fair value hierarchy, the Company’s assets and liabilities at fair value: June 30, 2019 Level 1 Level 2 Level 3 Total Assets: Money market funds * $ 13,250 $ — $ — $ 13,250 Liabilities: Trade-in Guarantee** $ — $ — $ — $ — December 31, 2018 Level 1 Level 2 Level 3 Total Assets: Money market funds * $ 11,006 $ — $ — $ 11,006 Liabilities: Trade-in Guarantee** $ — $ — $ 268 $ 268 * Included in cash and cash equivalents on the condensed consolidated balance ** Included in deferred revenue on the condensed consolidated balance sheets.
Summary of Changes in Fair Value of Company's Level 3 Financial Liabilities	The table below sets forth a summary of changes in the fair value of the Company’s level 3 liabilities for the six months ended June 30, 2019 and 2018: Warrant Trade-In Liability Guarantee Balance at January 1, 2019 $ — $ 268 Recognition of revenue — (268 ) Balance at June 30, 2019 $ — $ — Balance at January 1, 2018 $ 3,785 $ 805 Recognition of revenue — — Change in fair value — — Balance at June 30, 2018 $ 3,785 $ 805

Inventory (Tables)

Inventory (Tables)	6 Months Ended
	Jun. 30, 2019
Inventory Disclosure [Abstract]
Schedule of Inventory	Inventory consisted of the following: June 30, 2019 December 31, 2018 Devices - for resale $ 15,272 $ 11,319 Work in process 3,719 — Raw materials 5,470 8,826 Accessories 2,034 1,686 $ 26,495 $ 21,831

Warranty Liability (Tables)

Warranty Liability (Tables)	6 Months Ended
	Jun. 30, 2019
Guarantees And Product Warranties [Abstract]
Schedule of Warranty Liability Included in Accrued Expenses on Condensed Consolidated Balance Sheet	The table below sets forth the activity in the warranty liability, which is included in accrued expenses on the condensed consolidated balance sheets for the six months ended June 30, 2019 and 2018: Balance, January 1, 2019 $ 1,103 Additions 874 Cost of warranty claims (552 ) Balance, June 30, 2019 $ 1,425 Balance, January 1, 2018 $ 1,742 Additions 387 Cost of warranty claims (569 ) Balance, June 30, 2018 $ 1,560

Borrowings (Tables)

Borrowings (Tables)	6 Months Ended
	Jun. 30, 2019
Debt Disclosure [Abstract]
Schedule of Future Aggregate Annual Principal Payment on All Long-Term Debt	Future aggregate annual principal payment on all long-term debt, excluding the discount of $388, are as follows for the next 5 years as of June 30, 2019: Year Ending, December 31 st Remainder of 2019 $ 111 2020 202 2021 144 2022 13,145 2023 80 $ 13,682

Warrants (Tables)

Warrants (Tables)	6 Months Ended
	Jun. 30, 2019
Equity [Abstract]
Schedule of Warrants Issued and Outstanding	There were 155,338 warrants exercised on May 10, 2019 for total cash proceeds of $23. The following table discloses warrants issued and outstanding as of June 30, 2019 and December 31, 2018: June 30, 2019 Number of Exercise warrant Year of Issuance date price shares expiration Common November 2012 $ 6.00 7 2028 November 2012 $ 6.00 927 2020 November 2012 $ 14.50 22 2028 Total warrants 956 December 31, 2018 Number of Exercise warrant Year of Issuance date price shares expiration Common November 2012 $ 6.00 7 2028 November 2012 $ 6.00 927 2020 November 2012 $ 14.50 22 2028 August 2016 $ 0.15 155,338 2023 Total warrants 156,294

Stock-based Compensation (Table

Stock-based Compensation (Tables)	6 Months Ended
	Jun. 30, 2019
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Schedule of Stock-based Compensation Expense	Stock-based compensation expense for the three and six months ended June 30, 2019 and 2018 is as follows: Three Months Ended Six Months Ended June 30 June 30 2019 2018 2019 2018 Research and development $ 172 $ 6 $ 175 $ 11 Sales and marketing 467 9 478 17 General and administrative 4,899 14 4,931 29 Cost of revenues 19 4 20 9 $ 5,557 $ 33 $ 5,604 $ 66
Summary of Stock Option Activity	Stock option activity for the six months ended June 30, 2019 is as follows: Weighted average Weighted average remaining Aggregate exercise price contractual life Intrinsic Options per share (in years) Value Outstanding at January 1, 2019 1,320,197 $ 0.77 7.99 $ 8,465 Options granted 637,213 $ 10.94 Options exercised (72,034 ) $ 0.77 Options forfeited (66,084 ) $ 1.53 Options cancelled — $ — Outstanding at June 30, 2019 1,819,292 $ 4.30 8.24 $ 15,331 Vested and expected to vest at June 30, 2019 1,819,292 $ 4.30 8.24 $ 15,331 Vested at June 30, 2019 1,115,256 $ 2.84 7.58 $ 11,026

Net Loss Per Share Attributab_2

Net Loss Per Share Attributable to Common Stockholders (Tables)	6 Months Ended
	Jun. 30, 2019
Earnings Per Share [Abstract]
Schedule of Computation of Basic and Diluted Net Loss Per Share Attributable to Common Stockholders	Three Months Ended Six Months Ended June 30 June 30 2019 2018 2019 2018 Numerator: Net loss allocable to common stockholders $ (6,083 ) $ (3,123 ) $ (12,289 ) $ (11,161 ) Denominator: Weighted-average shares used in computing net loss per share, basic and diluted 18,120,143 1,036,059 16,950,375 1,035,345 Net loss per share, basic and diluted $ (0.34 ) $ (3.01 ) $ (0.73 ) $ (10.78 )
Summary of Potentially Dilutive Common Shares were Excluded from Calculation of Diluted Net Loss Per Share	The potentially dilutive common shares that were excluded from the calculation of diluted net loss per share because their effect would have been antidilutive for the three and six months ended June 30, 2019 and 2018, respectively, are presented are as follows: Three Months Ended Six Months Ended June 30 June 30 2019 2018 2019 2018 Shares of convertible preferred stock — 11,906,783 — 11,906,783 Shares subject to options to purchase common stock 1,819,292 1,037,618 1,819,292 1,037,618 Unvested restricted stock units 128,000 — 128,000 — Shares subject to warrants to purchase convertible preferred stock — — — 156,294 Shares subject to warrants to purchase common stock 956 156,294 956 — Shares subject to term debt optional conversion into convertible preferred stock — 1,422,865 — 1,422,865 Shares subject to term debt optional conversion into common stock 1,099,278 — 1,099,278 — Total 3,047,526 14,523,560 3,047,526 14,523,560

Entity Level Information (Table

Entity Level Information (Tables)	6 Months Ended
	Jun. 30, 2019
Segment Reporting [Abstract]
Summary of Revenue by Region	Segment Information —The Company operates in one reporting segment. Operating segments are defined as components of an enterprise about which separate financial information is evaluated regularly by the chief operating decision maker, who is the chief executive officer, in deciding how to allocate resources and assessing performance. The Company’s chief operating decision maker allocates resources and assesses performance based upon discrete financial information at the consolidated level. The following table summarizes the revenue by region based on ship-to destinations for the three and six months ended June 30, 2019 and 2018: Three Months Ended Six Months Ended June 30 June 30 2019 2018 2019 2018 U.S $ 35,125 $ 24,128 $ 55,232 $ 36,553 Canada and Latin America 5,662 4,380 9,290 6,632 Europe and Middle East 2,210 2,923 4,010 6,086 Asia Pacific 750 19 1,699 369 $ 43,747 $ 31,450 $ 70,231 $ 49,640
Composition of Revenues	The composition of revenues for the three and six months ended June 30, 2019 and 2018 is follows: Three Months Ended Six Months Ended June 30 June 30 2019 2018 2019 2018 Product Sales $ 43,609 $ 31,017 $ 69,941 $ 47,984 Services 138 433 290 1,656 Total revenues $ 43,747 $ 31,450 $ 70,231 $ 49,640
Percentage of Total Revenues	Revenue from customers with concentration greater than 10% in the three and six months ended June 30, 2019 and 2018 accounted for approximately the following percentage of total revenues: Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 Customer A 32% 23% 34% 15% Customer B * * * 16% Customer C 25% * 20% * Customer D * 10% * 12% Customer E 10% 39% * 28% * Customer revenue did not exceed 10% in the respective

The Company and its Significa_3

The Company and its Significant Accounting Policies - Additional Information (Details) $ / shares in Units, $ in Thousands	May 22, 2019USD ($)$ / sharesshares	May 14, 2019$ / sharesshares	Nov. 02, 2018	Jun. 30, 2019USD ($)shares	Jun. 30, 2019USD ($)shares	Dec. 31, 2018USD ($)
Company And Significant Accounting Policies [Line Items]
Reverse stock split ratio			0.0667
IPO closing date		May 14, 2019
Net proceeds from issuance of IPO					$ 38,399
Unpaid issuance cost and charged to accounts payable or accrued expenses				$ 1,550	$ 1,550
Common Stock
Company And Significant Accounting Policies [Line Items]
Shares issued and sold | shares					227,628
Common Stock | IPO
Company And Significant Accounting Policies [Line Items]
Shares issued and sold | shares	505,714	3,571,429		4,077,143	4,297,901
Shares issued and sold, price per share | $ / shares	$ 11	$ 11
Net proceeds from issuance of IPO	$ 36,849
Underwriting discounts and commissions	3,139
Offering expenses paid	$ 4,861
Deferred offering costs				$ 4,861	$ 4,861	$ 63
Common Stock | Over-Allotment
Company And Significant Accounting Policies [Line Items]
Shares issued and sold | shares	30,000
Shares issued and sold, price per share | $ / shares	$ 11

Fair Value Measurement - Summar

Fair Value Measurement - Summary of Fair Value Assets and Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Trade-in Guarantee
Liabilities:
Liabilities		$ 268
Money Market Funds
Assets:
Assets	$ 13,250	11,006
Level 1 | Money Market Funds
Assets:
Assets	$ 13,250	11,006
Level 3 | Trade-in Guarantee
Liabilities:
Liabilities		$ 268

Fair Value Measurement - Summ_2

Fair Value Measurement - Summary of Changes in Fair Value of Company's Level 3 Financial Liabilities (Details) - Level 3 - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Trade-In Guarantee
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Beginning Balance	$ 268	$ 805
Recognition of revenue	$ (268)	0
Change in fair value		0
Ending Balance		805
Warrant Liability
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Beginning Balance		3,785
Recognition of revenue		0
Change in fair value		0
Ending Balance		$ 3,785

Inventory - Schedule of Invento

Inventory - Schedule of Inventory (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Inventory Disclosure [Abstract]
Devices - for resale	$ 15,272	$ 11,319
Work in process	3,719
Raw materials	5,470	8,826
Accessories	2,034	1,686
Total inventory	$ 26,495	$ 21,831

Warranty Liability - Schedule o

Warranty Liability - Schedule of Warranty Liability Which is Included in Accrued Expenses on Condensed Consolidated Balance Sheet (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Guarantees And Product Warranties [Abstract]
Beginning balance	$ 1,103	$ 1,742
Additions	874	387
Cost of warranty claims	(552)	(569)
Ending balance	$ 1,425	$ 1,560

Borrowings - Additional Informa

Borrowings - Additional Information (Details)	Nov. 02, 2018$ / shares	Jun. 30, 2019USD ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)FinancingArrangement	Jan. 01, 2019USD ($)Installment	Oct. 26, 2017USD ($)
Debt Instrument [Line Items]
Reverse stock split		15-to-1
Reverse stock split ratio	0.0667
Long-term debt		$ 13,682,000
Other Financing Arrangements
Debt Instrument [Line Items]
Number of financing arrangements | FinancingArrangement				3
Debt instrument, face amount				$ 472,000
Long-term debt		99,000	$ 238,000
Debt instrument, discount		388,000
Other Financing Arrangement One
Debt Instrument [Line Items]
Debt instrument, maturity date				2020-06
Other Financing Arrangement Two
Debt Instrument [Line Items]
Debt instrument, maturity date				2020-08
Loan and Security Agreement | East West Bank
Debt Instrument [Line Items]
Maximum borrowings available		$ 8,000,000
Line of credit facility, interest rate during period		1.00%
Line of credit facility, maturity date		2019-11
Remaining borrowing capacity		$ 8,000,000	8,000,000
Subordinated Term Loan and Security Agreement | B. Riley Principal Investments, LLC
Debt Instrument [Line Items]
Maximum borrowings available			12,000,000			$ 10,000,000
Minimum principal amount outstanding to have waiver of defined prepayment penalties			$ 10,000,000
Debt instrument, stated interest rate			10.00%
Line of credit facility, maturity date			Sep. 1, 2022
Outstanding borrowings		12,000,000	$ 12,000,000
Total accrued interest		1,109,000	1,001,000
Debt instrument, convertible, price of common stock per share | $ / shares	$ 8.87
Subordinated Term Loan and Security Agreement | B. Riley Principal Investments, LLC | Prior to First Anniversary of Effective Date
Debt Instrument [Line Items]
Designated percentage	100.00%
Subordinated Term Loan and Security Agreement | B. Riley Principal Investments, LLC | Year Two of Loan Agreement
Debt Instrument [Line Items]
Designated percentage	75.00%
Subordinated Term Loan and Security Agreement | B. Riley Principal Investments, LLC | Year Three of Loan Agreement
Debt Instrument [Line Items]
Designated percentage	50.00%
Subordinated Term Loan and Security Agreement | B. Riley Principal Investments, LLC | Year Four of Loan Agreement
Debt Instrument [Line Items]
Designated percentage	25.00%
Subordinated Term Loan and Security Agreement | B. Riley Principal Investments, LLC | Final Year of Agreement on or Prior to Maturity Date
Debt Instrument [Line Items]
Designated percentage	12.50%
Promissory Notes Payable
Debt Instrument [Line Items]
Debt instrument, outstanding balance		$ 582,000	$ 718,000		$ 736,000
Debt instrument, periodic payment, number of equal quarterly installments | Installment					20
Debt instrument, frequency of periodic payment		quarterly
Promissory Notes Payable | Minimum
Debt Instrument [Line Items]
Debt instrument, payment term		2 years
Promissory Notes Payable | Maximum
Debt Instrument [Line Items]
Debt instrument, stated interest rate		8.00%
Debt instrument, payment term		4 years

Borrowings - Schedule of Future

Borrowings - Schedule of Future Aggregate Annual Principal Payment on All Long-Term Debt (Details) $ in Thousands	Jun. 30, 2019USD ($)
Debt Disclosure [Abstract]
Remainder of 2019	$ 111
2020	202
2021	144
2022	13,145
2023	80
Long-term Debt	$ 13,682

Convertible Preferred Stock a_2

Convertible Preferred Stock and Stockholders' Equity - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands	Oct. 23, 2017	Jan. 31, 2019	Dec. 31, 2018	Jun. 30, 2019	Dec. 31, 2018	Apr. 24, 2019	Nov. 02, 2018	Nov. 01, 2018
Class Of Stock [Line Items]
Authorized capital stock	33,853,333
Common stock, shares authorized	18,666,666		100,000,000	100,000,000	100,000,000		100,000,000
Capital stock par value	$ 0.001						$ 0.001
Convertible preferred stock							5,000,000
Preferred stock, shares issued				0
Dividends, value	$ 6,539
Dividends, fair value								$ 10,152
Preferred shares converted into common stock								13,277,864
Proceeds from issuance of common stock, net of costs				$ 1,604
Common stock, shares issued to former employee in exchange for release of claims and other agreements						10,000
Securities Purchase Agreement
Class Of Stock [Line Items]
Common stock, number of shares available for sale							2,089,136
Proceeds from issuance of common stock, net of costs		$ 1,604	$ 8,295
Issuance cost		$ 30			$ 831
Common Stock
Class Of Stock [Line Items]
Shares issued and sold				227,628
Common Stock | Securities Purchase Agreement
Class Of Stock [Line Items]
Shares issued and sold		227,628			1,270,905
Common stock, shares issued price per share			$ 7.18		$ 7.18
Convertible Preferred Stock
Class Of Stock [Line Items]
Convertible preferred stock	15,186,664
Series A-3 Convertible Preferred Stock
Class Of Stock [Line Items]
Convertible preferred stock	1,266,666
Series A-2 Convertible Preferred Stock
Class Of Stock [Line Items]
Convertible preferred stock	1,186,666
Number of shares issued as dividends					49,456
Series A-1 Convertible Preferred Stock
Class Of Stock [Line Items]
Convertible preferred stock	1,733,333
Number of shares issued as dividends					66,255
Series A Convertible Preferred Stock
Class Of Stock [Line Items]
Convertible preferred stock	9,333,333
Number of shares issued as dividends					944,694
Series B Convertible Preferred Stock
Class Of Stock [Line Items]
Convertible preferred stock	1,666,666

Warrants - Additional Informati

Warrants - Additional Information (Details) - USD ($) $ in Thousands	May 10, 2019	Jun. 30, 2019
Equity [Abstract]
Number of warrants exercised	155,338
Cash proceeds from warrants exercised	$ 23	$ 23

Warrants - Schedule of Warrants

Warrants - Schedule of Warrants Issued and Outstanding (Details) - $ / shares	6 Months Ended	12 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Class Of Warrant Or Right [Line Items]
Number of warrant shares	956	156,294
Issuance Date, November 2012 Tranche One
Class Of Warrant Or Right [Line Items]
Exercise price	$ 6	$ 6
Number of warrant shares	7	7
Year of expiration	2028	2028
Issuance Date, November 2012 Tranche Two
Class Of Warrant Or Right [Line Items]
Exercise price	$ 6	$ 6
Number of warrant shares	927	927
Year of expiration	2020	2020
Issuance Date, November 2012 Tranche Three
Class Of Warrant Or Right [Line Items]
Exercise price	$ 14.50	$ 14.50
Number of warrant shares	22	22
Year of expiration	2028	2028
Issuance Date, August 2016
Class Of Warrant Or Right [Line Items]
Exercise price		$ 0.15
Number of warrant shares		155,338
Year of expiration		2023

Stock-based Compensation - Addi

Stock-based Compensation - Additional Information (Details) - USD ($) $ in Thousands	May 13, 2019	Apr. 10, 2019	Sep. 10, 2018	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares exercised						72,034
Compensation expense				$ 5,557	$ 33	$ 5,604	$ 66
Accelerated vesting of options						1,115,256
Unamortized stock-based compensation cost related to unvested stock options				2,700		$ 2,700
Unamortized stock-based compensation cost, weighted average period of recognition						3 years
IPO
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Compensation expense				$ 287
Chief Financial Officer | IPO
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Accelerated vesting of options			201,666
Common Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares exercised				17,314	1,520	72,034	9,977
Restricted stock award, fully vested shares				220,758
Common Stock | Chief Executive Officer
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Restricted stock award, fully vested shares	383,197
Restricted stock award, net shares issued	210,758
Restricted stock award, shares withheld to satisfy tax obligations	172,439
Restricted Stock Unit
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Aggregate restricted stock units, granted		128,000
Restricted Stock Award
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Compensation expense				$ 4,215
2012 Equity Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares available to be issued				0		0
Expiration period						10 years
Number of shares exercised						0		0
2012 Equity Incentive Plan | Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period						2 years
2012 Equity Incentive Plan | Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period						4 years
2012 Equity Incentive Plan | Options and SARs | Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Exercise price options granted from fair value common stock, percent						100.00%
2012 Equity Incentive Plan | Granted to Ten Percent Stockholders | Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Exercise price options granted from fair value common stock, percent						110.00%
2012 Equity Incentive Plan | Granted to Ten Percent Stockholders | Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period						5 years
2019 Equity Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares available to be issued				1,885,039		1,885,039
2019 Employee Stock Purchase Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock, number of shares available for sale				337,007		337,007
Period in which reserved shares will increase annually						10 years
Increase in common stock reserved for issuance as a percentage of total number of shares of capital stock outstanding on the last day of the prior calendar year				1.00%		1.00%
Increase In common stock reserved for issuance of number of shares of capital stock outstanding on last day of prior calendar year				500,000		500,000
Common stock reserved for issuance description						Additionally, the number of shares of common stock reserved for issuance under the 2019 Employee Stock Purchase Plan will automatically increase on January 1 of each calendar year for 10 years, starting January 1, 2020, and ending on, and including, January 1, 2029, in an amount equal to the lesser of 1% of the total number of shares of capital stock outstanding on December 31st of the prior calendar year, and (ii) 500,000 shares, unless the board of directors or compensation committee determines prior to such date that there will be a lesser increase, or no increase.
Number of shares issued						0
2019 Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock, number of shares available for sale				1,885,039		1,885,039
Period in which reserved shares will increase annually						10 years
Increase in common stock reserved for issuance as a percentage of total number of shares of capital stock outstanding on the last day of the prior calendar year				5.00%		5.00%
Common stock reserved for issuance description						1,885,039 shares of common stock are reserved for future issuance under the 2019 Equity Incentive Plan, plus the number of shares subject to outstanding stock options or other stock awards that were granted under the 2012 Option Plan that are forfeited, terminated, expire or are otherwise not issued. Additionally, the number of shares of common stock reserved for issuance under the 2019 Equity Incentive Plan will automatically increase on January 1 of each calendar year for 10 years, starting January 1, 2020 and ending on and including January 1, 2029, in an amount equal to 5% of the total number of shares of capital stock outstanding on December 31 of the prior calendar year, unless the board of directors or compensation committee determines prior to the date of increase that there will be a lesser increase, or no increase.

Stock-based Compensation - Sche

Stock-based Compensation - Schedule of Stock-based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 5,557	$ 33	$ 5,604	$ 66
Research and development
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense	172	6	175	11
Sales and marketing
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense	467	9	478	17
General and administrative
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense	4,899	14	4,931	29
Cost of revenues
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 19	$ 4	$ 20	$ 9

Stock-based Compensation - Summ

Stock-based Compensation - Summary of Stock Option Activity (Details) $ / shares in Units, $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2019USD ($)$ / sharesshares	Dec. 31, 2018USD ($)$ / sharesshares
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Options Outstanding at January 1, 2019	1,320,197
Options granted	637,213
Options exercised	(72,034)
Options forfeited	(66,084)
Options cancelled	0
Options Outstanding at June 30, 2019	1,819,292	1,320,197
Outstanding at January, 1, 2019, Weighted average exercise price per share | $ / shares	$ 0.77
Options granted, Weighted average exercise price per share | $ / shares	10.94
Options exercised, Weighted average exercise price per share | $ / shares	0.77
Options forfeited, Weighted average exercise price per share | $ / shares	1.53
Outstanding at June 30, 2019, Weighted average exercise price per share | $ / shares	$ 4.30	$ 0.77
Outstanding, Weighted average remaining contractual life (in years)	8 years 2 months 26 days	7 years 11 months 26 days
Outstanding, Aggregate Intrinsic Value | $	$ 15,331	$ 8,465
Options Vested and expected to vest	1,819,292
Options Vested	1,115,256
Vested and expected to vest, Weighted average exercise price per share | $ / shares	$ 4.30
Vested, Weighted average exercise price per share | $ / shares	$ 2.84
Vested and expected to vest, Weighted average remaining contractual life (in years)	8 years 2 months 26 days
Vested, Weighted average remaining contractual life (in years)	7 years 6 months 29 days
Vested and expected to vest, Aggregate Intrinsic Value | $	$ 15,331
Vested, Aggregate Intrinsic Value | $	$ 11,026

Income Taxes - Additional Infor

Income Taxes - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Provisions for income taxes	$ 457	$ 148	$ 752	$ 681
Corporate tax rate			21.00%		35.00%
Gross amount of unrecognized tax benefits	6,000		$ 6,000
Unrecognized tax benefits that would reduce effective tax rate	$ 700		$ 700

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Loss Contingencies [Line Items]
Severance obligation change in control period			12 months
Contingent severance obligation accrual	$ 0		$ 0		$ 0
Cost of Revenues
Loss Contingencies [Line Items]
Royalty expense	1,247,000	$ 619,000	$ 1,698,000	$ 1,029,000
Wireless Essential Patent Holders
Loss Contingencies [Line Items]
Royalty expire year			2021
Other Providers of Integrated Technologies
Loss Contingencies [Line Items]
Royalty expire year			2023
Maximum
Loss Contingencies [Line Items]
Severance obligation before change in control	1,057,000		$ 1,057,000
Severance obligation change in control	1,407,000		1,407,000
Severance obligation in event of termination with cause	$ 88,000		$ 88,000
Maximum | Wireless Essential Patent Holders
Loss Contingencies [Line Items]
Royalty payment percent of net revenues			5.00%
Maximum | Other Providers of Integrated Technologies
Loss Contingencies [Line Items]
Royalty payment percent of net revenues			5.00%

Related Party Transactions - Ad

Related Party Transactions - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Investor and Holder of August 2016 Series A Warrants
Related Party Transaction [Line Items]
Revenue from related party		$ 797	$ 0	$ 0
B . Riley Principal Investments
Related Party Transaction [Line Items]
Consulting fees	$ 6	$ 50	$ 56	$ 100

Net Loss Per Share Attributab_3

Net Loss Per Share Attributable to Common Stockholders - Schedule of Computation of Basic and Diluted Net Loss Per Share Attributable to Common Stockholders (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Numerator:
Net loss allocable to common stockholders	$ (6,083)	$ (3,123)	$ (12,289)	$ (11,161)
Denominator:
Weighted–average shares used in computing net loss per share attributable to common stockholders, basic and diluted	18,120,143	1,036,059	16,950,375	1,035,345
Net loss per share attributable to common stockholders, basic and diluted	$ (0.34)	$ (3.01)	$ (0.73)	$ (10.78)

Net Loss Per Share Attributab_4

Net Loss Per Share Attributable to Common Stockholders - Summary of Potentially Dilutive Common Shares were Excluded from Calculation of Diluted Net Loss Per Share (Details) - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Total dilutive common shares excluded from calculation of diluted net loss per share	3,047,526	14,523,560	3,047,526	14,523,560
Convertible Preferred Stock
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Total dilutive common shares excluded from calculation of diluted net loss per share		11,906,783		11,906,783
Shares Subject to Options to Purchase Common Stock
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Total dilutive common shares excluded from calculation of diluted net loss per share	1,819,292	1,037,618	1,819,292	1,037,618
Unvested Restricted Stock Units
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Total dilutive common shares excluded from calculation of diluted net loss per share	128,000		128,000
Shares Subject to Warrants to Purchase Convertible Preferred Stock
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Total dilutive common shares excluded from calculation of diluted net loss per share				156,294
Shares Subject to Warrants to Purchase Common Stock
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Total dilutive common shares excluded from calculation of diluted net loss per share	956	156,294	956
Shares Subject to Term Debt Optional Conversion into Convertible Preferred Stock
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Total dilutive common shares excluded from calculation of diluted net loss per share		1,422,865		1,422,865
Shares Subject to Term Debt Optional Conversion into Common Stock
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Total dilutive common shares excluded from calculation of diluted net loss per share	1,099,278		1,099,278

Entity Level Information - Addi

Entity Level Information - Additional Information (Details) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2019USD ($)Segment	Dec. 31, 2018USD ($)
Revenues From External Customers And Long Lived Assets [Line Items]
Number of reporting segment | Segment	1
Allowance for credit losses	$ 7	$ 11
Receivables | Customer Concentration | Customer One
Revenues From External Customers And Long Lived Assets [Line Items]
Concentration risk percentage	46.00%	44.00%
Receivables | Customer Concentration | Customer Two
Revenues From External Customers And Long Lived Assets [Line Items]
Concentration risk percentage	37.00%	43.00%
Receivables | Customer Concentration | Customer Three
Revenues From External Customers And Long Lived Assets [Line Items]
Concentration risk percentage	6.00%
U.S [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Long-lived assets	$ 1,397	$ 2,013
Asia Pacific [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Long-lived assets	$ 510	$ 393

Entity Level Information - Summ

Entity Level Information - Summary of Revenue by Region (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Revenues From External Customers And Long Lived Assets [Line Items]
Revenue	$ 43,747	$ 31,450	$ 70,231	$ 49,640
U.S [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Revenue	35,125	24,128	55,232	36,553
Canada and Latin America [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Revenue	5,662	4,380	9,290	6,632
Europe and Middle East [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Revenue	2,210	2,923	4,010	6,086
Asia Pacific [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Revenue	$ 750	$ 19	$ 1,699	$ 369

Entity Level Information - Comp

Entity Level Information - Composition of Revenues (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Entity Wide Information Revenue From External Customer [Line Items]
Total revenues	$ 43,747	$ 31,450	$ 70,231	$ 49,640
Product Sales
Entity Wide Information Revenue From External Customer [Line Items]
Total revenues	43,609	31,017	69,941	47,984
Services
Entity Wide Information Revenue From External Customer [Line Items]
Total revenues	$ 138	$ 433	$ 290	$ 1,656

Entity Level Information - Perc

Entity Level Information - Percentage of Total Revenues (Details) - Revenues - Customer Concentration	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Customer A
Revenues From External Customers And Long Lived Assets [Line Items]
Concentration risk percentage	32.00%	23.00%	34.00%	15.00%
Customer B
Revenues From External Customers And Long Lived Assets [Line Items]
Concentration risk percentage				16.00%
Customer C
Revenues From External Customers And Long Lived Assets [Line Items]
Concentration risk percentage	25.00%		20.00%
Customer D
Revenues From External Customers And Long Lived Assets [Line Items]
Concentration risk percentage		10.00%		12.00%
Customer E
Revenues From External Customers And Long Lived Assets [Line Items]
Concentration risk percentage	10.00%	39.00%		28.00%

Subsequent Events - Additional

Subsequent Events - Additional Information (Details) - USD ($) $ in Thousands	1 Months Ended	6 Months Ended
	Aug. 13, 2019	Jun. 30, 2019	Jun. 30, 2018
Subsequent Event [Line Items]
Principal amount repaid on borrowings		$ 5,878	$ 44,702
Subordinated Term Loan and Security Agreement | Subsequent Event
Subsequent Event [Line Items]
Principal amount repaid on borrowings	$ 3,250
Percentage of principal amount repaid	25.00%