Airgain (AIRG) 10-K 28 Feb 20 2019 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Feb. 24, 2020	Jun. 28, 2019
Cover [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	FY
Trading Symbol	AIRG
Entity Registrant Name	AIRGAIN INC
Entity Central Index Key	0001272842
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Shell Company	false
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity File Number	001-37851
Entity Tax Identification Number	95-4523882
Entity Address, Address Line One	3611 Valley Centre Drive
Entity Address, Address Line Two	Suite 150
Entity Address, City or Town	San Diego
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	92130
City Area Code	760
Local Phone Number	579-0200
Entity Common Stock, Shares Outstanding		9,692,285
Entity Public Float			$ 9.7
Document Annual Report	true
Document Transition Report	false
Title of 12(b) Security	Common Stock, par value $0.0001 per share
Security Exchange Name	NASDAQ
Entity Incorporation, State or Country Code	DE

Balance Sheets

Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 13,197	$ 13,621
Short-term investments	21,686	20,169
Trade accounts receivable	7,656	7,013
Inventory	1,193	1,351
Prepaid expenses and other current assets	1,379	931
Total current assets	45,111	43,085
Property and equipment, net	2,108	1,401
Goodwill	3,700	3,700
Customer relationships, net	3,110	3,593
Intangible assets, net	687	859
Other assets	10	269
Total assets	54,726	52,907
Current liabilities:
Accounts payable	3,838	4,137
Accrued bonus	1,385	2,076
Accrued liabilities	1,451	1,217
Current portion of deferred rent obligation under operating lease	85	81
Total current liabilities	6,759	7,511
Deferred tax liability	52	38
Deferred rent obligation under operating lease	11	211
Total liabilities	6,822	7,760
Stockholders’ equity:
Common stock, par value $0.0001; 200,000 shares authorized; 10,146 shares issued and 9,681 shares outstanding at December 31, 2019; and 9,958 shares issued and 9,601 shares outstanding at December 31, 2018.	1	1
Additional paid in capital	96,622	93,583
Treasury stock, at cost; 465 shares and 357 shares at December 31, 2019 and 2018, respectively	(4,659)	(3,432)
Accumulated other comprehensive income (loss)	8	(11)
Accumulated deficit	(44,068)	(44,994)
Total stockholders’ equity	47,904	45,147
Commitments and contingencies (note 11)
Total liabilities and stockholders’ equity	$ 54,726	$ 52,907

Balance Sheets (Parenthetical)

Balance Sheets (Parenthetical) - $ / shares	Dec. 31, 2019	Dec. 31, 2018
Statement Of Financial Position [Abstract]
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares issued	10,146,000	9,958,000
Common stock, shares outstanding	9,681,000	9,601,000
Treasury stock, shares at cost	465,000	357,000

Statements of Operations

Statements of Operations - USD ($) shares in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Statement [Abstract]
Sales	$ 55,739,000	$ 60,625,000	$ 49,521,000
Cost of goods sold	30,415,000	34,114,000	26,219,000
Gross profit	25,324,000	26,511,000	23,302,000
Operating expenses:
Research and development	8,989,000	9,319,000	7,319,000
Sales and marketing	7,036,000	11,033,000	7,013,000
General and administrative	8,919,000	9,545,000	8,001,000
Total operating expenses	24,944,000	29,897,000	22,333,000
Income (loss) from operations	380,000	(3,386,000)	969,000
Other (income) expense:
Interest income	(714,000)	(584,000)	(297,000)
Interest expense	5,000	31,000	99,000
Gain on deferred purchase price liability		(389,000)
Loss on disposal of fixed assets		39,000
Total other income	(709,000)	(903,000)	(198,000)
Income (loss) before income taxes	1,089,000	(2,483,000)	1,167,000
Provision for income taxes	163,000	101,000	26,000
Net income (loss)	$ 926,000	$ (2,584,000)	$ 1,141,000
Net income (loss) per share:
Basic	$ 0.10	$ (0.27)	$ 0.12
Diluted	$ 0.09	$ (0.27)	$ 0.11
Weighted average shares used in calculating income (loss) per share
Basic	9,684	9,521	9,485
Diluted	10,097	9,521	10,361

Statements of Comprehensive Inc

Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement Of Income And Comprehensive Income [Abstract]
Net income (loss)	$ 926	$ (2,584)	$ 1,141
Unrealized gain (loss) on available-for-sale securities, net of deferred taxes	19	6	(17)
Total comprehensive income (loss)	$ 945	$ (2,578)	$ 1,124

Statements of Stockholders' Equ

Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit
Beginning balance at Dec. 31, 2016	$ 45,033	$ 1	$ 88,583			$ (43,551)
Reversal of secondary offering cost			1
Stock-based compensation			736
Issuance of shares for stock purchase plans			588
Repurchases of common stock				$ (1,257)
Unrealized gain (loss) on available-for-sale securities, net of deferred taxes	(17)				$ (17)
Net income (loss)	1,141					1,141
Ending balance at Dec. 31, 2017	46,225	1	89,908	(1,257)	(17)	(42,410)
Stock-based compensation			2,910
Issuance of shares for stock purchase plans			765
Repurchases of common stock				(2,175)
Unrealized gain (loss) on available-for-sale securities, net of deferred taxes	6				6
Net income (loss)	(2,584)					(2,584)
Ending balance at Dec. 31, 2018	45,147	1	93,583	(3,432)	(11)	(44,994)
Stock-based compensation			2,204
Issuance of shares for stock purchase plans			835
Repurchases of common stock				(1,227)
Unrealized gain (loss) on available-for-sale securities, net of deferred taxes	19				19
Net income (loss)	926					926
Ending balance at Dec. 31, 2019	$ 47,904	$ 1	$ 96,622	$ (4,659)	$ 8	$ (44,068)

Statements of Cash Flows

Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash flows from operating activities:
Net income (loss)	$ 926,000	$ (2,584,000)	$ 1,141,000
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation	493,000	587,000	436,000
Amortization	655,000	677,000	581,000
Amortization of discounts on investments, net	(312,000)	(202,000)	(91,000)
Stock-based compensation	2,204,000	2,910,000	736,000
Deferred tax liability	14,000	30,000	2,000
Loss on disposal of fixed assets		39,000
Gain on deferred purchase price liability		(389,000)
Changes in operating assets and liabilities:
Trade accounts receivable	(643,000)	1,043,000	(2,679,000)
Inventory	158,000	(610,000)	(162,000)
Prepaid expenses and other assets	(189,000)	(241,000)	(526,000)
Accounts payable	(303,000)	294,000	(102,000)
Accrued bonus	(691,000)	416,000	476,000
Accrued liabilities	234,000	(470,000)	50,000
Deferred obligation under operating lease	(196,000)	(123,000)	(117,000)
Net cash provided by (used in) operating activities	2,350,000	1,377,000	(255,000)
Cash flows from investing activities:
Purchases of available-for-sale securities	(36,456,000)	(29,666,000)	(21,962,000)
Maturities of available-for-sale securities	35,270,000	30,992,000	750,000
Cash paid for acquisition			(6,349,000)
Purchases of property and equipment	(1,196,000)	(990,000)	(263,000)
Net cash provided by (used in) investing activities	(2,382,000)	336,000	(27,824,000)
Cash flows from financing activities:
Repayment of notes payable		(1,333,000)	(1,389,000)
Costs related to initial public offering			1,000
Payment on deferred purchase price liability		(375,000)
Repurchase of common stock	(1,227,000)	(2,174,000)	(1,257,000)
Proceeds from issuance of common stock	835,000	765,000	588,000
Net cash used in financing activities	(392,000)	(3,117,000)	(2,057,000)
Net decrease in cash and cash equivalents	(424,000)	(1,404,000)	(30,136,000)
Cash and cash equivalents, beginning of period	13,621,000	15,025,000	45,161,000
Cash and cash equivalents, end of period	13,197,000	13,621,000	15,025,000
Supplemental disclosure of cash flow information
Interest paid	1,000	37,000	99,000
Taxes paid	71,000	$ 46,000	$ 103,000
Supplemental disclosure of non-cash investing and financing activities:
Accrual of property and equipment	$ 4,000

Significant Accounting Policies

Significant Accounting Policies	12 Months Ended
	Dec. 31, 2019
Accounting Policies [Abstract]
Significant Accounting Policies	( 1 ) Significant Accounting Policies (a) Description of Business Airgain, Inc. (the Company) was incorporated in the State of California on March 20, 1995, and reincorporated in the State of Delaware on August 15, 2016. The Company is a leading provider of advanced antenna technologies used to enable high performance wireless networking across a broad range of devices and markets, including consumer, enterprise, and automotive. The Company designs, develops, and engineers its antenna products for original equipment and design manufacturers worldwide. The Company’s headquarters is in San Diego, California with office space and research, design, and test facilities in the United States, United Kingdom, China, and Taiwan. (b) Basis of Presentation The financial statements of the Company have been prepared in conformity with U.S. generally accepted accounting principles (GAAP). (c) Recently Issued Accounting Pronouncements In January 2017, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2017-04, Simplifying the Test for Goodwill Impairment In June 2016, the FASB issued ASU 2016-13, Financial Instruments-Credit Losses In May 2019, the FASB issued ASU 2019-05, Financial Instruments-Credit Losses In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842) In June 2018, the FASB issued ASU 2018-07, Compensation—Stock Compensation (Topic 718): Improvements to Nonemployee Share-Based Payment Accounting, ( d ) Segment Information The Company’s operations are located primarily in the United States and most of its assets are located in San Diego, California and Scottsdale, Arizona. The Company operates in one segment related to the sale of antenna products. The Company’s chief operating decision-maker is its chief executive officer, who reviews operating results on an aggregate basis and manages the Company’s operations as a single operating segment. ( e ) Cash Equivalents and Short-Term Investments Cash equivalents are comprised of short-term, highly liquid investments with maturities of 90 days or less at the date of purchase. Short-term investments consist predominantly of commercial paper, corporate debt securities, U.S. Treasury securities, and asset backed securities. The Company classifies short-term investments based on the facts and circumstances surrounding the investments at the time of purchase and evaluates such classification as of each balance sheet date. All short-term investments are classified as available-for-sale securities as of December 31, 2019, and are recorded at estimated fair value. Unrealized gains and losses for available-for-sale securities are included in accumulated other comprehensive income—a component of stockholders’ equity. Realized gains and losses are included in other income in the statement of operations. The Company evaluates its investments to determine whether those with unrealized loss positions are other than temporarily impaired. Impairments are considered to be other than temporary if they are related to deterioration in credit risk or if it is likely that the Company will sell the securities before recovery of their cost basis. ( f ) Trade Accounts Receivable Trade accounts receivable is adjusted for all known uncollectible accounts. The policy for determining when receivables are past due or delinquent is based on the contractual terms agreed upon. Accounts are written off once all collection efforts have been exhausted. An allowance for doubtful accounts is established when, in the opinion of management, collection of the account is doubtful. The allowance for doubtful accounts was $0 as of December 31, 2019 and 2018. ( g ) Inventory The majority of the Company’s products are manufactured by third parties that retain ownership of the inventory until title is transferred to the customer at the shipping point. In certain instances shipping terms are delivery at place and the Company is responsible for arranging transportation and delivery of goods ready for unloading at the named place. The Company bears all risk involved in bringing the goods to the named place and records the related goods in transit to the customer as inventory on the accompanying balance sheet. With the acquisition of substantially all of the assets of Antenna Plus, LLC (Antenna Plus), in April 2017, the Company began manufacturing products at its Scottsdale, Arizona and Shullsburg, Wisconsin locations. In July 2017 the Company relocated all of its product manufacturing operations in Shullsburg, Wisconsin to the Scottsdale, Arizona facility. See Note 4 for additional information relating to the Company’s acquisition of the Antenna Plus assets. Inventory is stated at the lower of cost or net realizable value. For items manufactured by the Company cost is determined using the weighted average cost method. For items manufactured by third parties cost is determined using the first-in, first-out method (FIFO). Any adjustments to reduce the cost of inventories to their net realizable value are recognized in earnings in the current period. As of December 31, 2019 and 2018, the Company’s inventories consist primarily of raw materials. Provisions for excess and obsolete inventories are estimated based on product life cycles, quality issues, and historical experience. As of December 31, 2019 and 2018, there was no provision for excess and obsolete inventories. ( h ) Property and Equipment Property and equipment are stated at cost and are depreciated using the straight-line method over the estimated useful lives of the assets, generally three to fifteen years. The estimated useful lives for leasehold improvements are determined as either the estimated useful life of the asset or the lease term, whichever is shorter. Depreciation of assets that are recorded under operating leases are included in depreciation expense. Maintenance and repairs are expensed as incurred. Property and equipment are reviewed for impairment whenever events or changes in circumstances indicate the carrying amount of an asset may not be recoverable. When assets are sold (or otherwise disposed of) the cost and related accumulated depreciation are removed from the accounts and any gain or loss is included as a non-operating expense. ( i ) Goodwill Goodwill having an indefinite useful life represents the excess of cost over fair value of net assets acquired. The Company reviews goodwill for impairment annually on December 1st and whenever events or changes in circumstances indicate that goodwill may be impaired. The Company completed its annual assessment for goodwill impairment in December 2019 and determined that goodwill is not impaired as of December 31, 2019. ( j ) Long-lived Assets The Company’s identifiable intangible assets are comprised of acquired developed technologies, customer relationships, tradenames, and non-compete agreements. The cost of the identifiable intangible assets with finite lives is amortized on a straight-line basis over the assets’ respective estimated useful lives. The Company periodically re-evaluates the original assumptions and rationale utilized in the establishment of the carrying value and estimated lives of long-lived assets and finite-lived intangible assets. Long-lived assets and finite-lived intangibles are assessed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. If an asset is considered to be impaired the impairment recognized is equal to the amount by which the carrying value of the asset exceeds its fair value. ( k ) Revenue Recognition Effective January 1, 2019, the Company adopted FASB ASU 2014-09, Revenue from Contracts with Customers ASC 606 may be applied either retrospectively or through the use of a modified-retrospective method. The full retrospective method requires companies to recast each prior reporting period presented as if the new guidance had always existed. Under the modified retrospective method, companies would recognize the cumulative effect of initially applying the standard as an adjustment to the opening balance of retained earnings at the date of initial application. The Company adopted ASC 606 on January 1, 2019, using the modified retrospective method. The Company sells antenna products. All of the Company’s revenue relates to contracts with customers. The Company’s accounting contracts are from purchase orders or purchase orders combined with purchase agreements. The majority of the Company’s revenue is recognized on a “point-in-time” basis and a nominal amount of revenue related to service contracts is recognized “over time”. A portion of sales is made through distributors under agreements allowing for pricing credits and/or rights of return under certain circumstances. Pricing credits and returns under these provisions have been insignificant; accordingly, our allowance for sales returns and pricing credits was insignificant. To date service revenues have been immaterial as a percentage of total revenues. Service revenues are recognized over the term of the agreement which are typically one year or less. Prior to the adoption of ASC 606, the Company recognized the majority of its revenues using the units-of-delivery method of accounting. Based on the nature of products provided or services performed, revenue was recorded as products were shipped and customers would take ownership of the products. The methodology to recognize revenue under ASC 605 does not differ under ASC 606 as revenue is recognized at a point-in-time. To determine revenue recognition for arrangements that the Company determines are within the scope of ASC 606, the Company performs the following five steps: (i) identify the contract(s) with a customer; (ii) identify the performance obligation(s) in the contract; (iii) determine the transaction price; (iv) allocate the transaction price to the performance obligation(s) in the contract; and (v) recognize revenue when (or as) the entity satisfies a performance obligation. The Company only applies the five-step model to contracts when it is probable that the entity will collect substantially all of the consideration it is entitled to in exchange for the goods or services it transfers to the customer. At contract inception, once the contract is determined to be within the scope of ASC 606, the Company assesses the goods or services promised within each contract and determines those that are performance obligations and assesses whether each promised good or service is distinct. The Company then recognizes as revenue the amount of the transaction price that is allocated to the respective performance obligation when the performance obligation is satisfied. Each distinct promise to transfer products is considered to be an identified performance obligation for which revenue is recognized upon transfer of control of the products to the customer. Although customers may place orders for products that are delivered on multiple dates in different quarterly reporting periods; all of the orders are normally scheduled within one year from the order date. The Company has opted to not disclose the portion of revenues allocated to partially unsatisfied performance obligations, which represent products to be shipped within 12 months under open customer purchase orders, at the end of the current reporting period as allowed under ASC 606. We have also elected to record sales commissions when incurred, pursuant to the practical expedient under ASC 340, as the period over which the sales commission asset that would have been recognized is less than one year. Shipping and handling costs are immaterial and reported in in operating expenses in the statement of operations. There were no contract assets at December 31, 2019. The Company records contract liabilities for customer prepayments which are recorded in accrued liabilities in the balance sheet. ( l ) Shipping and Transportation Costs Shipping and other transportation costs—expensed as incurred--were $278,000, $433,000, and $462,000 for the years ended December 31, 2019, 2018, and 2017, respectively. These costs are included in general and administrative expenses in the accompanying statements of operations. ( m ) Research and Development Costs Research and development costs are expensed as incurred. (n) Advertising Costs Advertising costs—expensed as incurred—were $28,000, $2,526,000, and $16,000 for the years ended December 31, 2019, 2018, and 2017, respectively. These costs are included in sales and marketing expenses in the accompanying statements of operations. ( o ) Income Taxes The Company records income taxes under the asset and liability method. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statements carrying amounts of existing assets and liabilities and their respective tax bases. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. When applicable a valuation allowance is established to reduce any deferred tax asset when it is determined that it is more likely than not that some portion of the deferred tax asset will not be realized. The Company recognizes the effect of income tax positions only if those positions are more likely than not of being sustained. Recognized income tax positions are measured at the largest amount that is greater than 50% likely of being realized. Changes in recognition or measurement are reflected in the period in which the change in judgment occurs. The Company records interest related to unrecognized tax benefits in interest expense and penalties in general and administrative expenses. ( p ) Stock-Based Compensation The Company recognizes all employee stock-based compensation as a cost in the financial statements. Equity classified awards are measured at the grant-date fair value of the award. The Company estimates the grant-date fair value using the Black-Scholes-Merton option-pricing model. The Company recognizes forfeitures when incurred. Compensation cost is recognized on a straight-line basis over the requisite service period for the entire award. Stock-based compensation expense was $2.2 million, $2.9 million, and $0.7 million for the years ended December 31, 2019, 2018, and 2017, respectively. ( q ) Fair Value Measurements The carrying values of the Company’s financial instruments, including cash, trade accounts receivable, accounts payable, and accrued liabilities approximate their fair values due to the short maturity of these instruments. Fair value measurements are market-based measurements, not entity-specific measurements. Therefore, fair value measurements are determined based on the assumptions that market participants would use in pricing the asset or liability. The Company follows a three-level hierarchy to prioritize the inputs used in the valuation techniques to derive fair values. The basis for fair value measurements for each level within the hierarchy is described below: • Level 1: Quoted prices in active markets for identical assets or liabilities. • Level 2: Quoted prices for similar assets or liabilities in active markets; quoted prices for identical or similar instruments in markets that are not active; and model-derived valuations in which all significant inputs are observable in active markets. • Level 3: Valuations derived from valuation techniques in which one or more significant inputs are unobservable in active markets. ( r ) Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Significant items subject to such estimates and assumptions include valuation of intangible assets. ( s ) Accumulated Other Comprehensive Income (Loss) Comprehensive income (loss) is comprised of net income (loss) and other comprehensive income (loss). Accumulated other comprehensive loss on the balance sheet at December 31, 2019 and 2018, includes unrealized gains and losses on the Company’s available-for-sale securities. ( t ) Net Income (Loss) Per Share Basic net income (loss) per share is calculated by dividing net income (loss) available to common stockholders by the weighted average shares of common stock outstanding for the period. Diluted net income (loss) per share is calculated by dividing net income (loss) by the weighted average shares of common stock outstanding for the period plus amounts representing the dilutive effect of securities that are convertible into common stock. The Company calculates diluted income (loss) per common share using the treasury stock method. The following table presents the computation of net income (loss) per share (in thousands, except per share data) For the year ended December 31 2019 2018 2017 Numerator: Net income (loss) $ 926 $ (2,584 ) $ 1,141 Denominator: Weighted average common shares outstanding Basic 9,684 9,521 9,485 Diluted 10,097 9,521 10,361 Net income (loss) per share: Basic $ 0.10 $ (0.27 ) $ 0.12 Diluted $ 0.09 $ (0.27 ) $ 0.11 Diluted weighted average common shares outstanding for the year ended December 31, 2019, includes 1,000 warrants and 412,000 options outstanding. Basic and diluted weighted average common shares outstanding for the year ended December 31, 2018 were the same. Diluted weighted average common shares outstanding for the year ended December 31, 2017 includes 2,000 warrants and 874,000 options outstanding. Potentially dilutive securities (in common stock equivalent shares) not included in the calculation of diluted net income (loss) per share because to do so would be anti-dilutive are as follows (in thousands) For the year ended December 31 2019 2018 2017 Stock options 402 978 514 Warrants outstanding — 51 — Total 402 1,029 514

Cash, Cash Equivalents and Shor

Cash, Cash Equivalents and Short-Term Investments	12 Months Ended
	Dec. 31, 2019
Cash And Cash Equivalents [Abstract]
Cash, Cash Equivalents and Short-Term Investments	( 2 ) Cash, Cash Equivalents and Short-Term Investments The following tables show the Company’s cash and cash equivalents and short-term investments by significant investment category as of December 31 (in thousands) 2019 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value Cash and Cash Equivalents Short-Term Investments Cash $ 3,950 $ — $ — $ 3,950 $ 3,950 $ — Level 1 (1) Money market funds 5,500 — — 5,500 5,500 — U.S. treasury securities 3,078 2 (1 ) 3,079 — 3,079 Subtotal 8,578 2 (1 ) 8,579 5,500 3,079 Level 2 (2) Commercial paper 8,920 — — 8,920 747 8,173 Corporate debt obligations 5,922 5 (1 ) 5,926 — 5,926 Repurchase agreements 3,000 — — 3,000 3,000 — Asset-backed securities 4,505 3 — 4,508 — 4,508 Subtotal 22,347 8 (1 ) 22,354 3,747 18,607 Total $ 34,875 $ 10 $ (2 ) $ 34,883 $ 13,197 $ 21,686 2018 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value Cash and Cash Equivalents Short-Term Investments Cash $ 3,044 $ — $ — $ 3,044 $ 3,044 $ — Level 1 (1) Money market funds 5,482 — — 5,482 5,482 — U.S. treasury securities 1,988 — — 1,988 — 1,988 Subtotal 7,470 — — 7,470 5,482 1,988 Level 2 (2) Commercial paper 10,639 — — 10,639 2,095 8,544 Corporate debt obligations 5,964 — (7 ) 5,957 — 5,957 Repurchase agreements 3,000 — — 3,000 3,000 — Asset-backed securities 3,682 — (3 ) 3,680 — 3,680 Subtotal 23,285 — (10 ) 23,276 5,095 18,181 Total $ 33,799 $ — $ (10 ) $ 33,790 $ 13,621 $ 20,169 (1) Level 1 fair value estimates are based on quoted prices in active markets for identical assets or liabilities. (2) Level 2 fair value estimates are based on observable inputs other than quoted prices in active markets for identical assets and liabilities, quoted prices for identical or similar assets or liabilities in inactive markets, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. The Company’s investments were primarily valued based upon one or more valuations reported by its investment accounting and reporting service provider. The investment service provider values the securities using a hierarchical security pricing models that relies primarily on valuations provided by a third-party pricing vendor. Such valuations may be based on trade prices in active markets for identical assets or liabilities (Level 1 inputs) or valuation models using inputs that are observable either directly or indirectly (Level 2 inputs), such as quoted prices for similar assets or liabilities, yield curve, volatility factors, credit spreads, default rates, loss severity, current market and contractual prices for underlying instruments or debt, broker and dealer quotes, as well as other relevant economic measures. The Company performs certain procedures to corroborate the fair value of its holdings, including comparing valuations obtained from its investment service provider with other pricing sources to validate the reasonableness of the valuations. The Company typically invests in highly rated securities and its investment policy limits the amount of credit exposure to any one issuer. The policy requires investments in fixed income instruments denominated and payable in U.S. dollars only and requires investments to be investment grade, with a primary objective of minimizing the potential risk of principal loss. As of December 31 the Company’s short-term investments in a continuous unrealized loss position for 12 months or less are as follows (in thousands) Description of securities Estimated fair value Unrealized losses 2019 U.S. treasury securities $ 1,218 $ (1 ) Corporate debt obligations 1,428 (1 ) Asset-backed securities 753 — Total $ 3,399 $ (2 ) 2018 U.S. treasury securities $ 1,988 $ — Corporate debt obligations 5,957 (7 ) Asset-backed securities 3,032 (3 ) Total $ 10,977 $ (10 ) The Company considers the declines in market value of its short-term investments to be temporary in nature. Fair values were determined for each individual security in the investment portfolio. When evaluating an investment for other-than-temporary impairment, the Company reviews factors such as length of time and extent to which fair value has been below its cost basis; the financial condition of the issuer and any changes thereto; changes in market interest rates and the Company’s intent to sell; or whether it is more likely than not it will be required to sell the investment before recovery of the investment’s cost basis. As of December 31, 2019, the Company does not consider any of its investments to be other-than temporarily impaired. The estimated fair value of contractual maturities of short-term investments as of December 31, 2019 is $21.7 million.

Property and Equipment

Property and Equipment	12 Months Ended
	Dec. 31, 2019
Property Plant And Equipment [Abstract]
Property and Equipment	( 3 ) Property and Equipment Depreciation and amortization of property and equipment is calculated on the straight-line method based on estimated useful lives of six to ten years for tenant improvements and three to fifteen years for all other property and equipment. Property and equipment consist of the following at December 31 (in thousands) 2019 2018 Computers and software $ 572 $ 361 Furniture, fixtures, and equipment 299 339 Manufacturing and testing equipment 3,444 2,503 Leasehold improvements 911 895 5,226 4,098 Less accumulated depreciation (3,118 ) (2,697 ) $ 2,108 $ 1,401 Depreciation expense was $493,000, $587,000, and $436,000 for the years ended December 31, 2019, 2018, and 2017, respectively. For the year ended December 31, 2018, the Company incurred a $39,000 loss on disposals of fixed assets.

Acquisitions

Acquisitions	12 Months Ended
	Dec. 31, 2019
Business Combinations [Abstract]
Acquisitions	( 4) Acquisitions Antenna Plus On April 27, 2017, the Company completed the acquisition of substantially all the assets of Antenna Plus. Goodwill from the acquisition was primarily attributable to the anticipated synergies and economies of scale expected from the operations of the combined business. The synergies include certain cost savings, operating efficiencies, and other strategic benefits projected to be achieved as a result of the acquisition. Goodwill is expected to be deductible for tax purposes. The following table shows the allocation of the purchase price for Antenna Plus to the acquired identifiable assets, liabilities assumed and goodwill (in thousands) Consideration: Cash $ 6,384 Contingent consideration arrangement (35 ) Fair value of total consideration transferred $ 6,349 Recognized amounts of identifiable assets acquired and liabilities assumed: Accounts receivable $ 584 Inventory 433 Fixed assets 403 Intangible assets 2,600 Current liabilities (122 ) Identifiable assets, net 3,898 Goodwill 2,451 Total $ 6,349 Sales associated with the acquired Antenna Plus assets since the date of acquisition was $5.2 million for the year ended December 31, 2017. Cost of goods sold associated with the acquired Antenna Plus assets since the date of acquisition was $2.3 million for the year ended December 31, 2017. Net income associated with the acquired Antenna Plus assets since the date of acquisition was $0.4 million for the year ended December 31, 2017. Skycross On December 17, 2015, the Company purchased certain assets of Skycross, Inc. (Skycross), a manufacturer of advanced antenna and radio-frequency solutions. The agreement included a purchase price of $4.0 million and contingent consideration arrangements. In the year ended December 31, 2018, the Company recognized a gain on deferred purchase price liability in settlement of the contingent arrangement as follows (in thousands) Settlement of contingent consideration: Deferred purchase price $ 1,000 Due to Skycross 126 Due from Skycross (362 ) Less consideration paid (375 ) Gain on deferred purchase price $ 389

Goodwill and Intangible Assets

Goodwill and Intangible Assets	12 Months Ended
	Dec. 31, 2019
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets	( 5 ) Goodwill and Intangible Assets There were no changes to the Company’s goodwill balance during the years ended December 31, 2019 and 2018. The following is a summary of the Company’s acquired intangible assets as of December 31 (dollars in thousands) 2019 Weighted average amortization period (years) Gross carrying amount Accumulated amortization Intangibles, net Customer relationships 10 $ 4,830 $ 1,720 $ 3,110 Developed technologies 9 1,080 $ 406 674 Tradename 3 120 $ 107 13 Total $ 6,030 $ 2,233 $ 3,797 2018 Customer relationships 10 $ 4,830 $ 1,237 $ 3,593 Developed technologies 9 1,080 274 806 Tradename 3 120 67 53 Total $ 6,030 $ 1,578 $ 4,452 The estimated annual amortization of intangible assets for the next five years and thereafter is shown in the following table (actual amortization expense to be reported in future periods could differ from these estimates as a result of acquisitions, divestitures, and asset impairments, among other factors) (in thousands) Estimated future amortization 2020 $ 628 2021 598 2022 563 2023 563 2024 563 Thereafter 882 Total $ 3,797 Amortization expense was $655,000, $677,000, and $581,000 for the years ended December 31, 2019, 2018, and 2017, respectively.

Long-term Notes Payable (Includ

Long-term Notes Payable (Including Current Portion) and Line of Credit	12 Months Ended
	Dec. 31, 2019
Long Term Debt [Abstract]
Long-term Notes Payable (Including Current Portion) and Line of Credit	( 6 ) Long-term Notes Payable (including current portion) and Line of Credit In December 2013, the Company amended its revolving line of credit under the amended and restated loan and security with Silicon Valley Bank to include a growth capital term loan of up to $750 thousand. The growth capital term loan matured on February 1, 2017, at which time $55 thousand in principal and accrued interest was paid. The growth capital term loan interest rate was 6.5%. As of December 31, 2019 there was no balance owed under this loan. In December 2015, the Company further amended its amended and restated loan and security agreement with Silicon Valley Bank to include a term loan in the amount of $4.0 million. The loan required 36 monthly installments of interest and principal. The loan matured on December 1, 2018. The interest rate was fixed at 5%. In January 2018, the Company entered into a second amended and restated loan and security agreement (the Amended Loan Agreement) with Silicon Valley Bank. The Amended Loan Agreement modified the amended and restated loan and security agreement to, among other things, increase the aggregate principal amount available under the revolving line of credit from $3.0 million to $10.0 million and modify certain existing financial covenants. There was no balance owed on the line of credit as of. Under the Amended Loan Agreement, the Company may borrow up to $10.0 million under the line of credit, subject to a borrowing base limit of 80% of the aggregate face amount of all eligible receivables. The Amended Loan Agreement removed the minimum EBITDA requirement previously applicable to the line of credit and term loan and maintained the liquidity ratio financial covenant such that the Company must maintain a ratio of cash and cash equivalents plus accounts receivable outstanding debt under the Amended Loan Agreement minus deferred revenue of 1.25 to 1.00. The Company will be required to pay interest on borrowings outstanding, if any, under the revolving line of credit at a floating rate per annum equal to 1% above the Wall Street Journal prime rate (4.75% as of December 31, 2019) (or, if unavailable, the Silicon Valley Bank prime rate) on a monthly basis, so long as the Company maintains a liquidity ratio of cash and cash equivalents plus accounts receivable to outstanding debt under the Amended Loan Agreement minus deferred revenue of 1.50 to 1.00. If this liquidity ratio is not met, the Company will be subject to a minimum interest charge of $3 thousand per month and borrowings outstanding, if any, under the revolving line of credit will accrue interest at a floating rate per annum equal to 2% above the Wall Street Journal prime rate (4.75% as of December 31, 2019) (or, if unavailable the Silicon Valley Bank prime rate) on a monthly basis. Prior to the amendment in January 2018, the revolving line of credit bore interest rate at the U.S. prime rate plus 1.25%. The revolving line of credit matured on January 31, 2020 and was not renewed. Silicon Valley Bank maintained a first security interest over the Company’s assets, excluding intellectual property, for which Silicon Valley Bank received a negative pledge. The Amended Loan Agreement contains customary affirmative and negative covenants and events of default applicable to the Company and any of its subsidiaries. The Company was in compliance with all financial term loan and revolving line of credit financial covenants as of December 31, 2019.

Treasury Stock

Treasury Stock	12 Months Ended
	Dec. 31, 2019
Equity [Abstract]
Treasury Stock	( 7 ) Treasury Stock In August 2017 the Company’s Board of Directors (Board) approved a share repurchase program (2017 Program) pursuant to which the Company may purchase up to $7.0 million of shares of its common stock over the 12-month period following the establishment of the program. The repurchases under the 2017 Program are made from time to time in the open market or in privately negotiated transactions and are funded from the Company’s working capital. Repurchases will be made in compliance with Rule 10b-18 of the Securities Exchange Act of 1934, as amended, subject to market conditions, available liquidity, cash flow, applicable legal requirements, and other factors. All shares of common stock repurchased under the Company’s share repurchase program will be returned to the status of authorized but unissued shares of common stock. On August 7, 2018, the Board approved an extension to the existing share repurchase program for an additional 12-month period ending August 14, 2019. On September 9, 2019, the Board approved a new share repurchase program pursuant to which the Company may purchase up to $7.0 million of shares of its common stock over the following 12 months. This newly adopted share repurchase program mirrors all aspects and terms of the 2017 Program as described above. In the year ended December 31, 2018, the Company repurchased an aggregate of 222,000 shares of common stock under the repurchase program at a weighted average price per share of $9.92, for a total cost of $2.2 million. In the year ended December 31, 2019, the Company repurchased 108,000 shares of common stock under the repurchase programs. These shares were repurchased at a weighted average price per share of $11.41for a total cost of $1.2 million. As of December 31, 2019, the Company has repurchased an aggregate of 465,000 shares of common stock under the share repurchase programs at a weighted average price per share of $10.02, for a total cost of $4.7 million.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Income Taxes	( 8 ) Income Taxes (a) Income Taxes The income tax provisions for the years ended December 31 are as follows (in thousands) 2019 2018 2017 Current: U.S. federal $ 145 $ 67 $ 21 State and local 3 6 3 Total current provision 148 73 24 Deferred: U.S. federal 10 23 1 State and local 5 5 1 Total deferred provision 15 28 2 Total tax provision $ 163 $ 101 $ 26 (b) Tax Rate Reconciliation Reconciliations of the total income tax provision tax rate to the statutory federal income tax rate of 21%, 21%, and 34% for the years ended December 31, 2019, 2018, and 2017, respectively, are as follows (in thousands) 2019 2018 2017 Income taxes at statutory rates $ 229 $ (521 ) $ 397 State income tax, net of federal benefit 8 10 4 Permanent items (11 ) 18 (5 ) Meals and entertainment 50 47 75 Equity based compensation (8 ) (99 ) (646 ) Corporate tax rate change - impact on deferred income taxes — — 2,768 Research and development credit (94 ) (195 ) 207 Federal NOL adjustment — — (386 ) Federal return to provision 101 (168 ) 53 Other federal credits - — 112 Other 145 64 16 Change in federal valuation allowance (257 ) 945 (2,569 ) $ 163 $ 101 $ 26 (c) Significant Components of Current and Deferred Taxes The tax effects of temporary differences that give rise to significant portions of the deferred tax assets and deferred tax liabilities at December 31, are as follows (in thousands) 2019 2018 Deferred tax assets: Net operating loss carryforwards $ 4,564 $ 4,924 Research and AMT credits 2,208 2,074 Stock based compensation 387 327 Accrued and other 748 651 7,907 7,976 Less valuation allowance (7,455 ) (7,659 ) Deferred tax assets, net of allowance 452 317 Deferred tax liabilities: Fixed assets (288 ) (192 ) Goodwill (216 ) (163 ) Deferred tax liabilities (504 ) (355 ) Total deferred tax liabilities $ (52 ) $ (38 ) The Company has established a valuation allowance against its net deferred tax assets due to the uncertainty surrounding the realization of such assets. The Company periodically evaluates the recoverability of the deferred tax assets. At such time it is determined that it is more likely than not that deferred assets are realizable, the valuation allowance will be reduced. The Company has recorded a valuation allowance of $7.5 million as of December 31, 2019 as it does not believe it is more likely than not that certain deferred tax assets will be realized due to the recent history of both pre-tax book income and losses, the lack of taxable income available in carryback periods or feasible tax-planning strategies, the limited existing taxable temporary differences, and the subjective nature of forecasting future taxable income into the future. At December 31, 2019, the Company had federal and California tax loss carryforwards of approximately $19.0 million, and $5.7 million, respectively. The federal loss generated in 2018 of $1.6 million will carryforward indefinitely and be available to offset up to 80% of future taxable income each year. The remaining federal and state net operating loss carry forwards begin to expire in 2020 and 2028, respectively, if unused. At December 31, 2019, the Company had federal and state tax credit carry forwards of approximately $1.5 million, and $1.5 million, respectively, after reduction for uncertain tax positions. The federal credits will begin to expire in 2026, if unused, and the state credits carry forward indefinitely. Pursuant to the Internal Revenue Code of 1986, as amended (IRC), specifically IRC §382 and IRC §383, the Company’s ability to use net operating loss and research and development tax credit carry forwards (“tax attribute carry forwards”) to offset future taxable income is limited if the Company experiences a cumulative change in ownership of more than 50% within a three-year testing period. The Company has not completed an ownership change analysis pursuant to IRC Section 382 for taxable years ended after December 31, 2012. If ownership changes within the meaning of IRC Section 382 are identified as having occurred subsequent to 2012, the amount of remaining tax attribute carry forwards available to offset future taxable income and income tax expense in future years may be significantly restricted or eliminated. Further, the Company’s deferred tax assets associated with such tax attributes could be significantly reduced upon realization of an ownership change within the meaning of IRC §382. The following table summarizes the reconciliation of the unrecognized tax benefits activity during the years ended December 31 (in thousands) 2019 2018 Beginning unrecognized tax benefits $ 732 $ 710 Decreases related to prior year tax positions (7 ) (65 ) Increases related to current year tax positions 40 87 Ending unrecognized tax benefits $ 765 $ 732 The unrecognized tax benefit amounts are reflected in the determination of the Company’s deferred tax assets. If recognized, $9,000 of these amounts would impact company’s effective tax rate. The Company does not foresee material changes to its uncertain tax benefits within the next twelve months. The Company’s policy is to recognize interest and/or penalties related to income tax matters in income tax expense. The Company has an accrual for interest or penalties of $3,000 and $2,000 on the Company’s balance sheets as of December 31, 2019 and 2018, respectively, and has recognized interest and/or penalties of $1,000 in the Statement of Operations for each of the three years ended December 31, 2019. Due to the existence of federal and state net operating loss and credit carryovers, the Company’s tax years that remain open and subject to examination by tax jurisdiction are years 2000 and forward for federal and years 2006 and forward for the state of California.

Stockholders' Equity

Stockholders' Equity	12 Months Ended
	Dec. 31, 2019
Class Of Stock Disclosures [Abstract]
Stockholders' Equity	( 9 ) Stockholders’ Equity Shares Reserved for Future Issuance The following common stock is reserved for future issuance at December 31 (1) (in thousands) 2019 2018 Warrants issued and outstanding 51 51 Stock option awards issued and outstanding 1,600 1,407 Authorized for grants under the 2016 Equity Incentive Plan 401 (2) 463 Authorized for grants under the 2016 Employee Stock Purchase Plan 186 (3) 100 2,238 2,021 (1) (2) (3)

Stock Based Compensation

Stock Based Compensation	12 Months Ended
	Dec. 31, 2019
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Stock-Based Compensation	(10) Stock Based Compensation (a) Stock Options In August 2016, the Company’s board of directors adopted the 2016 Equity Incentive Plan (the 2016 Plan) for employees, directors, and consultants. As of December 31, 2019, 401,000 shares are available for issuance under the 2016 Plan. The service period for stock options granted to employees is generally one to four years. The grant-date fair value of each option award is estimated on the date of grant using the Black-Scholes-Merton option-pricing model. The weighted average assumptions for grants during the years ended December 31, 2019, 2018, and 2017, are provided in the following table. Before 2019 the Company’s lack of option exercise history did not provide it reasonable basis for estimating the expected term. Therefore, the Company estimated the expected term using the simplified method, which calculates the expected term as the average of the time-to-vesting and the contractual life of an options. Beginning in 2019 the Company uses its historical option activity data to calculate the expected terms. Since the Company’s shares have only been publicly traded since August 12, 2016 and its shares were rarely traded privately, expected volatility is estimated based on the average historical volatility of similar entities with publicly traded shares in addition to the average historical volatility of the Company. The risk-free rate for the expected term of the option is based on the U.S. Treasury yield curve at the date of grant. Commencing in 2019 each non-employee member of the board of directors will receive an annual award on the first trading day in February of each year of (1) a number of stock options having a value of $30,000 (with the award to the chairperson of the board of directors having a value of $45,000), (calculated as of the date of grant in accordance with the Black-Scholes option pricing model) and (2) the restricted stock units described below. As of December 31, 2019 2018 2017 Valuation assumptions: Expected dividend yield 0 % 0 % 0 % Expected volatility 40.78 % 37.60 % 39.37 % Expected term (years) 5.96 5.86 6.06 Risk-free interest rate 2.1 % 2.6 % 1.9 % A summary of the Company’s stock option activity is as follows (shares in thousands) Number of shares Weighted average exercise price Weighted average remaining contractual term Balance at December 31, 2018 1,407 $ 8.73 Granted 782 11.77 Exercised (176 ) 4.20 Expired/Forfeited (413 ) 11.45 Balance at December 31, 2019 1,600 9.98 7.8 Vested and exercisable at December 31, 2019 746 $ 8.39 6.6 Vested and expected to vest at December 31, 2019 1,600 $ 9.98 7.8 The weighted average grant-date fair values of options granted during the years ended December 31, 2019, 2018, and 2017, were $4.93, $3.97, and $6.02, respectively. For fully vested stock options the aggregate intrinsic values were $2.3 million, $2.5 million, and $3.6 million as of December 31, 2019, 2018, and 2017, respectively. For stock options expected to vest the aggregate intrinsic values were $0.3 million, $1.0 million, and $1.5 million as of December 31, 2019, 2018, and 2017, respectively. The grant date fair value of shares vested during the years ended December 31, 2019, 2018, and 2017 was $2.1 million, $2.8 million, and $0.3 million, respectively. At December 31, 2019, 2018, and 2017, there was $2.3 million, $2.8 million, and $2.5 million, respectively, of total unrecognized compensation cost related to unvested stock options and restricted stock granted under the plans. That cost is expected to be recognized over the next three years. (b) Restricted Stock The following table summarizes the Company’s Restricted Stock Unit activity (shares in thousands) : Restricted stock units Weighted average grant date fair value Non-vested balance at December 31, 2018 4 $ 13.67 Grants 96 11.35 Vested (1 ) 13.67 Forfeitures (18 ) 11.35 Non-vested balance at December 31, 2019 80 11.43 Commencing in 2019, each non-employee member of the board of directors will receive, on the first trading day in February of each year, such number of restricted stock units as is determined by dividing (a) $30,000 (with the award to the chairperson of the board of directors having a value of $45,000) by (b) the 30-day trailing average share price. During the year ended December 31, 2019, 14,000 restricted stock units with a fair value of $10.75 per share were issued to the members of the Company’s board of directors of which the shares vest on the first anniversary of the grant date, and 81,000 restricted stock units with a fair value of $11.46 per share were issued to employees of which the shares vest equally on each of the annual anniversaries over a four-year period. During the year ended December 31, 2018, 4,000 restricted stock units with a fair value of $12.62 per share were issued to a member of the Company’s board of directors of which the shares vest equally on each of the annual anniversaries over a three-year period. As of December 31, 2019, there was $0.6 million of total unrecognized stock-based compensation expense related to non-vested restricted stock units which is expected to be recognized over a remaining weighted-average vesting period of 2.7 years. The Company currently uses authorized and unissued shares to satisfy share award exercises. (c) Employee Stock Purchase Plan (ESPP) The Company maintains the Employee Stock Purchase Plan (ESPP) that provides employees an opportunity to purchase common stock through payroll deductions. The ESPP is implemented through consecutive 6-month offering periods commencing on March 1 and September 1 of each year. The first offering period under the ESPP commenced on March 1, 2019. The purchase price is set at 85% of the fair market value of the Company's common stock on either the first or last trading day of the offering period, whichever is lower, and annual contributions are limited to the lower of 20% of an employee's eligible compensation or such other limits as apply under Section 423 of the Internal Revenue Code for such plans such as the ESPP. The ESPP is intended to qualify as an employee stock purchase plan for purposes of Section 423 of the Internal Revenue Code. Based on the 15% discount and the fair value of the option feature of the ESPP, it is considered compensatory. Compensation expense is calculated using the fair value of the employees’ purchase rights under the Black-Scholes model. The Company currently uses authorized and unissued shares to satisfy share award exercises. The Company received proceeds of $97,000 from the issuance of 10,000 shares under the ESPP in August 2019.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2019
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	(11) Commitments and Contingencies (a) Operating Leases The Company has entered into lease agreements for office space and research facilities in San Diego County, California; Melbourne, Florida; Scottsdale, Arizona; Taipei, Taiwan; Shenzhen and Jiangsu, China; and Cambridge, United Kingdom. Rent expense was $973,000, $912,000, and $805,000 for the years ended December 31, 2019, 2018, and 2017, respectively. The longest lease expires in November 2024. The Company moved into its facility in San Diego, California during the year ended December 31, 2014. The San Diego facility lease agreement included a tenant improvement allowance which provided for the landlord to pay for tenant improvements on behalf of the Company up to $515,000. Based on the terms of this landlord incentive and involvement of the Company in the construction process, the leasehold improvements purchased under the landlord incentive were determined to be property of the Company. The future minimum lease payments required under operating leases in effect at December 31, 2019, were as follows (in thousands) Year ending: 2020 $ 886 2021 395 2022 104 2023 72 2024 33 $ 1,490 In February 2020, the Company extended its office space lease agreement in San Diego though 2025 adding a total of approximately $3.2 million to be paid as follows; $1,212,000 in one to three years, $1.3 million in three to five years, and $0.6 million after five years. (b) Indemnification In some agreements to which the Company is a party, the Company has agreed to indemnify the other party for certain matters, including, but not limited to, product liability and intellectual property. To date, there have been no known events or circumstances that have resulted in any material costs related to these indemnification provisions and no liabilities have been recorded in the accompanying financial statements. (c) Employment Agreements On January 16, 2019, the Company entered into amended and restated employment agreements with Jacob Suen, the Company’s President, Anil Doradla, the Company’s Chief Financial Officer and Secretary, and Kevin Thill, the Company’s Senior Vice President, Engineering. The amended and restated employment agreements provide for an indefinite term and for at-will employment. The agreements also set forth each executive’s annual base salary and target bonus opportunity and provide that each executive will be entitled to the benefits provided to employees generally. Pursuant to the amended and restated employment agreements, severance in the aggregate amount in excess of $455,000 for termination without cause is provided. On March 13, 2019, the Company entered into an employment agreement with James K. Sims, the Company’s Chairman and Chief Executive Officer. On August 8, 2019, the Company entered into an amended and restated employment agreement with James K. Sims to appoint Mr. Sims as Advisor to the newly appointed Chief Executive Officer. The amended and restated employment agreement provided for a term that expired on February 9, 2020, and for at-will employment. The agreement also sets forth Mr. Sim’s annual base salary and target bonus opportunity and provides that he will be entitled to the benefits provided to employees generally. Pursuant to the agreement, Mr. Sims is eligible for severance in excess of $400,000. On August 8, 2019, the Company entered into an amendment to the amended and restated employment agreement with Jacob Suen in connection with his promotion to Chief Executive Officer of the Company. The amendment to the amended and restated employment agreement also sets forth Mr. Suen’s annual base salary. On November 30, 2019, Anil Doradla, the Company's Chief Financial Officer resigned from his position. Following his resignation, Mr. Doradla provided consulting services to the Company for three months and his outstanding stock awards continued to vest during the term of his consulting services. On January 13, 2020, the Company entered into an employment agreement with David B. Lyle, the Company’s Chief Financial Officer and Secretary. The agreement sets forth Mr. Lyle's base salary, target bonus, and stock awards.

Concentration of Credit Risk

Concentration of Credit Risk	12 Months Ended
	Dec. 31, 2019
Risks And Uncertainties [Abstract]
Concentration of Credit Risk	(12) Concentration of Credit Risk (a) Concentration of Sales and Accounts Receivable The following represents customers that accounted for 10% or more of total revenue during the years ended December 31, 2019, 2018, and 2017, and customers that accounted for 10% or more of total trade accounts receivable at December 31, 2019 and 2018: For the year ended December 31 2019 2018 2017 Percentage of net revenue Customer A 36 % 36 % 21 % Customer B 14 % 8 % 13 % Customer C 5 % 7 % 10 % As of December 31 2019 2018 Percentage of gross trade accounts receivable Customer A 33 % 32 % Customer B 14 % 0 % Customer C 3 % 14 % Customer D 5 % 14 % ( b ) Concentration of Purchases During the years ended December 31, 2019 and 2018, all of the Company’s products were manufactured in our Scottsdale, Arizona facilities and by two vendors in China. During the year ended December 31, 2017, all the Company’s products were manufactured in Shullsburg, Wisconsin and Scottsdale, Arizona facilities and by two vendors in China. The Shullsburg, Wisconsin facility was closed in July 2017.

Disaggregated Revenues

Disaggregated Revenues	12 Months Ended
	Dec. 31, 2019
Revenue From Contract With Customer [Abstract]
Disaggregated Revenues	(13) Disaggregated Revenues Disaggregated revenues for the years ended December 31 are as follows (in thousands) By Sales Channel 2019 2018 2017 Fullfilment distributors $ 32,273 $ 34,389 $ 21,802 OEM/ODM/CM $ 17,075 20,155 21,504 Other $ 6,391 6,081 6,215 Total $ 55,739 $ 60,625 $ 49,521 By Geography 2019 2018 2017 Asia $ 40,810 $ 45,235 $ 33,165 North America 11,611 9,979 8,775 Other 3,318 5,412 7,581 Total $ 55,739 $ 60,625 $ 49,521

Termination Costs

Termination Costs	12 Months Ended
	Dec. 31, 2019
Restructuring And Related Activities [Abstract]
Termination Costs	(14) Termination Costs On June 30, 2018, the Company terminated a marketing-related agreement to better align its sales and marketing efforts with its longer-term growth objectives and near-to-immediate term profitability goals. In consideration of terminating the agreement, the Company paid $1.3 million in termination costs. The termination costs were included in sales and marketing expense on the statement of operations for the year ended December 31, 2018. On May 2, 2018, Charles Myers, the Company’s Chief Executive Officer, President and member of the Board resigned from all positions with the Company, effective immediately, to pursue other opportunities. The Board accepted Mr. Myers resignation on May 2, 2018. Mr. Myer’s decision to resign was not related to a disagreement with the Company over any of its operations, policies, or practices. In connection with his resignation, Mr. Myers, upon a general release of claims as set forth in his employment agreement, received a lump sum cash payment in the amount of $484,000; a lump sum cash payment in the amount $3,000 covering twelve months of monthly premiums for disability insurance under the Company’s disability insurance plan; a lump sum cash payment in the amount of $20,000 covering certain other employment benefits; the acceleration of all his unvested options for a total of 283,000 shares and the continuation of his health coverage pursuant to COBRA at the Company’s expense for a period of twelve months following his last day of employment. In connection with Mr. Myers’ resignation, the Company recognized stock compensation expense of $1.2 million for the year ended December 31, 2018. Mr. Myers’ costs were included in general and administrative expense on the statement of operations for the year ended December 31, 2018. On April 2, 2018, Glenn Selbo, the Company’s Chief Operating Officer, resigned from his position with the Company. Following his resignation, Mr. Selbo will be providing consulting services to the Company. Mr. Selbo’s outstanding stock options continue to vest during the term of his consulting services. In connection with his resignation, Mr. Selbo, upon a general release of claims as set forth in his employment agreement, received a lump sum cash payment in the amount of $150,000 and the continuation of his health coverage pursuant to COBRA at the Company’s expense for a period of six months following his last day of employment. In connection with Mr. Selbo’s resignation, the Company recognized stock compensation expense of $44,000. Mr. Selbo’s costs were included in sales and marketing expense on the statement of operations for the year ended December 31, 2018.

Employee Benefit Plan

Employee Benefit Plan	12 Months Ended
	Dec. 31, 2019
Postemployment Benefits [Abstract]
Employee Benefit Plan	(15) Employee Benefit Plan The Company established a discretionary 401(k) plan effective January 2005. The 401(k) plan was amended and restated in May 2006. The 401(k) plan covers substantially all employees who have attained age 21. The participants may elect to defer a percentage of their compensation as allowable by law. The Company can make discretionary matching contributions but has not done so through December 31, 2019.

Quarterly Financial Information

Quarterly Financial Information (unaudited)	12 Months Ended
	Dec. 31, 2019
Quarterly Financial Information Disclosure [Abstract]
Quarterly Financial Information (unaudited)	(16) Quarterly Financial Information (unaudited) The following is a summary of the quarterly results of operations for the years ended December 31, 2019 and 2018 (in thousands except per share data) For the three months ended 2019 December 31 September 30 June 30 March 31 Sales $ 13,028 $ 13,142 $ 14,462 $ 15,107 Gross profit 5,779 6,075 6,685 6,785 Total operating expenses 5,868 6,280 6,189 6,607 Net income (loss) 63 (135 ) 662 336 Basic net income (loss) per share 0.01 (0.01 ) 0.07 0.03 Diluted net income (loss) per share 0.01 (0.01 ) 0.07 0.03 2018 Sales $ 16,562 $ 15,787 $ 14,972 $ 13,305 Gross profit 6,850 6,865 6,602 6,194 Total operating expenses 5,730 6,558 10,251 7,358 Net income (loss) 1,275 437 (3,190 ) (1,106 ) Basic net loss per share 0.13 0.05 (0.34 ) (0.12 ) Diluted net loss per share 0.13 0.04 (0.34 ) (0.12 )

Significant Accounting Polici_2

Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2019
Accounting Policies [Abstract]
Description of Business	(a) Description of Business Airgain, Inc. (the Company) was incorporated in the State of California on March 20, 1995, and reincorporated in the State of Delaware on August 15, 2016. The Company is a leading provider of advanced antenna technologies used to enable high performance wireless networking across a broad range of devices and markets, including consumer, enterprise, and automotive. The Company designs, develops, and engineers its antenna products for original equipment and design manufacturers worldwide. The Company’s headquarters is in San Diego, California with office space and research, design, and test facilities in the United States, United Kingdom, China, and Taiwan.
Basis of Presentation	(b) Basis of Presentation The financial statements of the Company have been prepared in conformity with U.S. generally accepted accounting principles (GAAP).
Recently Issued Accounting Pronouncements	(c) Recently Issued Accounting Pronouncements In January 2017, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2017-04, Simplifying the Test for Goodwill Impairment In June 2016, the FASB issued ASU 2016-13, Financial Instruments-Credit Losses In May 2019, the FASB issued ASU 2019-05, Financial Instruments-Credit Losses In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842) In June 2018, the FASB issued ASU 2018-07, Compensation—Stock Compensation (Topic 718): Improvements to Nonemployee Share-Based Payment Accounting,
Segment Information	( d ) Segment Information The Company’s operations are located primarily in the United States and most of its assets are located in San Diego, California and Scottsdale, Arizona. The Company operates in one segment related to the sale of antenna products. The Company’s chief operating decision-maker is its chief executive officer, who reviews operating results on an aggregate basis and manages the Company’s operations as a single operating segment.
Cash Equivalents and Short Term Investments	( e ) Cash Equivalents and Short-Term Investments Cash equivalents are comprised of short-term, highly liquid investments with maturities of 90 days or less at the date of purchase. Short-term investments consist predominantly of commercial paper, corporate debt securities, U.S. Treasury securities, and asset backed securities. The Company classifies short-term investments based on the facts and circumstances surrounding the investments at the time of purchase and evaluates such classification as of each balance sheet date. All short-term investments are classified as available-for-sale securities as of December 31, 2019, and are recorded at estimated fair value. Unrealized gains and losses for available-for-sale securities are included in accumulated other comprehensive income—a component of stockholders’ equity. Realized gains and losses are included in other income in the statement of operations. The Company evaluates its investments to determine whether those with unrealized loss positions are other than temporarily impaired. Impairments are considered to be other than temporary if they are related to deterioration in credit risk or if it is likely that the Company will sell the securities before recovery of their cost basis.
Trade Accounts Receivable	( f ) Trade Accounts Receivable Trade accounts receivable is adjusted for all known uncollectible accounts. The policy for determining when receivables are past due or delinquent is based on the contractual terms agreed upon. Accounts are written off once all collection efforts have been exhausted. An allowance for doubtful accounts is established when, in the opinion of management, collection of the account is doubtful. The allowance for doubtful accounts was $0 as of December 31, 2019 and 2018.
Inventory	( g ) Inventory The majority of the Company’s products are manufactured by third parties that retain ownership of the inventory until title is transferred to the customer at the shipping point. In certain instances shipping terms are delivery at place and the Company is responsible for arranging transportation and delivery of goods ready for unloading at the named place. The Company bears all risk involved in bringing the goods to the named place and records the related goods in transit to the customer as inventory on the accompanying balance sheet. With the acquisition of substantially all of the assets of Antenna Plus, LLC (Antenna Plus), in April 2017, the Company began manufacturing products at its Scottsdale, Arizona and Shullsburg, Wisconsin locations. In July 2017 the Company relocated all of its product manufacturing operations in Shullsburg, Wisconsin to the Scottsdale, Arizona facility. See Note 4 for additional information relating to the Company’s acquisition of the Antenna Plus assets. Inventory is stated at the lower of cost or net realizable value. For items manufactured by the Company cost is determined using the weighted average cost method. For items manufactured by third parties cost is determined using the first-in, first-out method (FIFO). Any adjustments to reduce the cost of inventories to their net realizable value are recognized in earnings in the current period. As of December 31, 2019 and 2018, the Company’s inventories consist primarily of raw materials. Provisions for excess and obsolete inventories are estimated based on product life cycles, quality issues, and historical experience. As of December 31, 2019 and 2018, there was no provision for excess and obsolete inventories.
Property and Equipment	( h ) Property and Equipment Property and equipment are stated at cost and are depreciated using the straight-line method over the estimated useful lives of the assets, generally three to fifteen years. The estimated useful lives for leasehold improvements are determined as either the estimated useful life of the asset or the lease term, whichever is shorter. Depreciation of assets that are recorded under operating leases are included in depreciation expense. Maintenance and repairs are expensed as incurred. Property and equipment are reviewed for impairment whenever events or changes in circumstances indicate the carrying amount of an asset may not be recoverable. When assets are sold (or otherwise disposed of) the cost and related accumulated depreciation are removed from the accounts and any gain or loss is included as a non-operating expense.
Goodwill	( i ) Goodwill Goodwill having an indefinite useful life represents the excess of cost over fair value of net assets acquired. The Company reviews goodwill for impairment annually on December 1st and whenever events or changes in circumstances indicate that goodwill may be impaired. The Company completed its annual assessment for goodwill impairment in December 2019 and determined that goodwill is not impaired as of December 31, 2019.
Long-lived Assets	( j ) Long-lived Assets The Company’s identifiable intangible assets are comprised of acquired developed technologies, customer relationships, tradenames, and non-compete agreements. The cost of the identifiable intangible assets with finite lives is amortized on a straight-line basis over the assets’ respective estimated useful lives. The Company periodically re-evaluates the original assumptions and rationale utilized in the establishment of the carrying value and estimated lives of long-lived assets and finite-lived intangible assets. Long-lived assets and finite-lived intangibles are assessed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. If an asset is considered to be impaired the impairment recognized is equal to the amount by which the carrying value of the asset exceeds its fair value.
Revenue Recognition	( k ) Revenue Recognition Effective January 1, 2019, the Company adopted FASB ASU 2014-09, Revenue from Contracts with Customers ASC 606 may be applied either retrospectively or through the use of a modified-retrospective method. The full retrospective method requires companies to recast each prior reporting period presented as if the new guidance had always existed. Under the modified retrospective method, companies would recognize the cumulative effect of initially applying the standard as an adjustment to the opening balance of retained earnings at the date of initial application. The Company adopted ASC 606 on January 1, 2019, using the modified retrospective method. The Company sells antenna products. All of the Company’s revenue relates to contracts with customers. The Company’s accounting contracts are from purchase orders or purchase orders combined with purchase agreements. The majority of the Company’s revenue is recognized on a “point-in-time” basis and a nominal amount of revenue related to service contracts is recognized “over time”. A portion of sales is made through distributors under agreements allowing for pricing credits and/or rights of return under certain circumstances. Pricing credits and returns under these provisions have been insignificant; accordingly, our allowance for sales returns and pricing credits was insignificant. To date service revenues have been immaterial as a percentage of total revenues. Service revenues are recognized over the term of the agreement which are typically one year or less. Prior to the adoption of ASC 606, the Company recognized the majority of its revenues using the units-of-delivery method of accounting. Based on the nature of products provided or services performed, revenue was recorded as products were shipped and customers would take ownership of the products. The methodology to recognize revenue under ASC 605 does not differ under ASC 606 as revenue is recognized at a point-in-time. To determine revenue recognition for arrangements that the Company determines are within the scope of ASC 606, the Company performs the following five steps: (i) identify the contract(s) with a customer; (ii) identify the performance obligation(s) in the contract; (iii) determine the transaction price; (iv) allocate the transaction price to the performance obligation(s) in the contract; and (v) recognize revenue when (or as) the entity satisfies a performance obligation. The Company only applies the five-step model to contracts when it is probable that the entity will collect substantially all of the consideration it is entitled to in exchange for the goods or services it transfers to the customer. At contract inception, once the contract is determined to be within the scope of ASC 606, the Company assesses the goods or services promised within each contract and determines those that are performance obligations and assesses whether each promised good or service is distinct. The Company then recognizes as revenue the amount of the transaction price that is allocated to the respective performance obligation when the performance obligation is satisfied. Each distinct promise to transfer products is considered to be an identified performance obligation for which revenue is recognized upon transfer of control of the products to the customer. Although customers may place orders for products that are delivered on multiple dates in different quarterly reporting periods; all of the orders are normally scheduled within one year from the order date. The Company has opted to not disclose the portion of revenues allocated to partially unsatisfied performance obligations, which represent products to be shipped within 12 months under open customer purchase orders, at the end of the current reporting period as allowed under ASC 606. We have also elected to record sales commissions when incurred, pursuant to the practical expedient under ASC 340, as the period over which the sales commission asset that would have been recognized is less than one year. Shipping and handling costs are immaterial and reported in in operating expenses in the statement of operations. There were no contract assets at December 31, 2019. The Company records contract liabilities for customer prepayments which are recorded in accrued liabilities in the balance sheet.
Shipping and Transportation Costs	( l ) Shipping and Transportation Costs Shipping and other transportation costs—expensed as incurred--were $278,000, $433,000, and $462,000 for the years ended December 31, 2019, 2018, and 2017, respectively. These costs are included in general and administrative expenses in the accompanying statements of operations.
Research and Development Costs	( m ) Research and Development Costs Research and development costs are expensed as incurred.
Advertising Costs	(n) Advertising Costs Advertising costs—expensed as incurred—were $28,000, $2,526,000, and $16,000 for the years ended December 31, 2019, 2018, and 2017, respectively. These costs are included in sales and marketing expenses in the accompanying statements of operations.
Income Taxes	( o ) Income Taxes The Company records income taxes under the asset and liability method. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statements carrying amounts of existing assets and liabilities and their respective tax bases. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. When applicable a valuation allowance is established to reduce any deferred tax asset when it is determined that it is more likely than not that some portion of the deferred tax asset will not be realized. The Company recognizes the effect of income tax positions only if those positions are more likely than not of being sustained. Recognized income tax positions are measured at the largest amount that is greater than 50% likely of being realized. Changes in recognition or measurement are reflected in the period in which the change in judgment occurs. The Company records interest related to unrecognized tax benefits in interest expense and penalties in general and administrative expenses.
Stock-Based Compensation	( p ) Stock-Based Compensation The Company recognizes all employee stock-based compensation as a cost in the financial statements. Equity classified awards are measured at the grant-date fair value of the award. The Company estimates the grant-date fair value using the Black-Scholes-Merton option-pricing model. The Company recognizes forfeitures when incurred. Compensation cost is recognized on a straight-line basis over the requisite service period for the entire award. Stock-based compensation expense was $2.2 million, $2.9 million, and $0.7 million for the years ended December 31, 2019, 2018, and 2017, respectively.
Fair Value Measurements	( q ) Fair Value Measurements The carrying values of the Company’s financial instruments, including cash, trade accounts receivable, accounts payable, and accrued liabilities approximate their fair values due to the short maturity of these instruments. Fair value measurements are market-based measurements, not entity-specific measurements. Therefore, fair value measurements are determined based on the assumptions that market participants would use in pricing the asset or liability. The Company follows a three-level hierarchy to prioritize the inputs used in the valuation techniques to derive fair values. The basis for fair value measurements for each level within the hierarchy is described below: • Level 1: Quoted prices in active markets for identical assets or liabilities. • Level 2: Quoted prices for similar assets or liabilities in active markets; quoted prices for identical or similar instruments in markets that are not active; and model-derived valuations in which all significant inputs are observable in active markets. • Level 3: Valuations derived from valuation techniques in which one or more significant inputs are unobservable in active markets.
Use of Estimates	( r ) Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Significant items subject to such estimates and assumptions include valuation of intangible assets.
Accumulated Other Comprehensive Income (Loss)	( s ) Accumulated Other Comprehensive Income (Loss) Comprehensive income (loss) is comprised of net income (loss) and other comprehensive income (loss). Accumulated other comprehensive loss on the balance sheet at December 31, 2019 and 2018, includes unrealized gains and losses on the Company’s available-for-sale securities.
Net Income (Loss) Per Share	( t ) Net Income (Loss) Per Share Basic net income (loss) per share is calculated by dividing net income (loss) available to common stockholders by the weighted average shares of common stock outstanding for the period. Diluted net income (loss) per share is calculated by dividing net income (loss) by the weighted average shares of common stock outstanding for the period plus amounts representing the dilutive effect of securities that are convertible into common stock. The Company calculates diluted income (loss) per common share using the treasury stock method. The following table presents the computation of net income (loss) per share (in thousands, except per share data) For the year ended December 31 2019 2018 2017 Numerator: Net income (loss) $ 926 $ (2,584 ) $ 1,141 Denominator: Weighted average common shares outstanding Basic 9,684 9,521 9,485 Diluted 10,097 9,521 10,361 Net income (loss) per share: Basic $ 0.10 $ (0.27 ) $ 0.12 Diluted $ 0.09 $ (0.27 ) $ 0.11 Diluted weighted average common shares outstanding for the year ended December 31, 2019, includes 1,000 warrants and 412,000 options outstanding. Basic and diluted weighted average common shares outstanding for the year ended December 31, 2018 were the same. Diluted weighted average common shares outstanding for the year ended December 31, 2017 includes 2,000 warrants and 874,000 options outstanding. Potentially dilutive securities (in common stock equivalent shares) not included in the calculation of diluted net income (loss) per share because to do so would be anti-dilutive are as follows (in thousands) For the year ended December 31 2019 2018 2017 Stock options 402 978 514 Warrants outstanding — 51 — Total 402 1,029 514

Significant Accounting Polici_3

Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2019
Accounting Policies [Abstract]
Summary of Computation of Net Income or (Loss) Per Share	The following table presents the computation of net income (loss) per share (in thousands, except per share data) For the year ended December 31 2019 2018 2017 Numerator: Net income (loss) $ 926 $ (2,584 ) $ 1,141 Denominator: Weighted average common shares outstanding Basic 9,684 9,521 9,485 Diluted 10,097 9,521 10,361 Net income (loss) per share: Basic $ 0.10 $ (0.27 ) $ 0.12 Diluted $ 0.09 $ (0.27 ) $ 0.11
Summary of Potentially Dilutive Securities	Potentially dilutive securities (in common stock equivalent shares) not included in the calculation of diluted net income (loss) per share because to do so would be anti-dilutive are as follows (in thousands) For the year ended December 31 2019 2018 2017 Stock options 402 978 514 Warrants outstanding — 51 — Total 402 1,029 514

Cash, Cash Equivalents and Sh_2

Cash, Cash Equivalents and Short-Term Investments (Tables)	12 Months Ended
	Dec. 31, 2019
Cash And Cash Equivalents [Abstract]
Schedule of Cash and Cash Equivalents and Short-Term Investments by Significant Investment Category	The following tables show the Company’s cash and cash equivalents and short-term investments by significant investment category as of December 31 (in thousands) 2019 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value Cash and Cash Equivalents Short-Term Investments Cash $ 3,950 $ — $ — $ 3,950 $ 3,950 $ — Level 1 (1) Money market funds 5,500 — — 5,500 5,500 — U.S. treasury securities 3,078 2 (1 ) 3,079 — 3,079 Subtotal 8,578 2 (1 ) 8,579 5,500 3,079 Level 2 (2) Commercial paper 8,920 — — 8,920 747 8,173 Corporate debt obligations 5,922 5 (1 ) 5,926 — 5,926 Repurchase agreements 3,000 — — 3,000 3,000 — Asset-backed securities 4,505 3 — 4,508 — 4,508 Subtotal 22,347 8 (1 ) 22,354 3,747 18,607 Total $ 34,875 $ 10 $ (2 ) $ 34,883 $ 13,197 $ 21,686 2018 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value Cash and Cash Equivalents Short-Term Investments Cash $ 3,044 $ — $ — $ 3,044 $ 3,044 $ — Level 1 (1) Money market funds 5,482 — — 5,482 5,482 — U.S. treasury securities 1,988 — — 1,988 — 1,988 Subtotal 7,470 — — 7,470 5,482 1,988 Level 2 (2) Commercial paper 10,639 — — 10,639 2,095 8,544 Corporate debt obligations 5,964 — (7 ) 5,957 — 5,957 Repurchase agreements 3,000 — — 3,000 3,000 — Asset-backed securities 3,682 — (3 ) 3,680 — 3,680 Subtotal 23,285 — (10 ) 23,276 5,095 18,181 Total $ 33,799 $ — $ (10 ) $ 33,790 $ 13,621 $ 20,169 (1) Level 1 fair value estimates are based on quoted prices in active markets for identical assets or liabilities. (2) Level 2 fair value estimates are based on observable inputs other than quoted prices in active markets for identical assets and liabilities, quoted prices for identical or similar assets or liabilities in inactive markets, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.
Schedule of Short-Term Investments	As of December 31 the Company’s short-term investments in a continuous unrealized loss position for 12 months or less are as follows (in thousands) Description of securities Estimated fair value Unrealized losses 2019 U.S. treasury securities $ 1,218 $ (1 ) Corporate debt obligations 1,428 (1 ) Asset-backed securities 753 — Total $ 3,399 $ (2 ) 2018 U.S. treasury securities $ 1,988 $ — Corporate debt obligations 5,957 (7 ) Asset-backed securities 3,032 (3 ) Total $ 10,977 $ (10 )

Property and Equipment (Tables)

Property and Equipment (Tables)	12 Months Ended
	Dec. 31, 2019
Property Plant And Equipment [Abstract]
Schedule of Property and Equipment	Depreciation and amortization of property and equipment is calculated on the straight-line method based on estimated useful lives of six to ten years for tenant improvements and three to fifteen years for all other property and equipment. Property and equipment consist of the following at December 31 (in thousands) 2019 2018 Computers and software $ 572 $ 361 Furniture, fixtures, and equipment 299 339 Manufacturing and testing equipment 3,444 2,503 Leasehold improvements 911 895 5,226 4,098 Less accumulated depreciation (3,118 ) (2,697 ) $ 2,108 $ 1,401

Acquisitions (Tables)

Acquisitions (Tables)	12 Months Ended
	Dec. 31, 2019
Business Combinations [Abstract]
Summary of Allocation of Purchase Price for Acquired Identifiable Assets, Liabilities Assumed and Goodwill	The following table shows the allocation of the purchase price for Antenna Plus to the acquired identifiable assets, liabilities assumed and goodwill (in thousands) Consideration: Cash $ 6,384 Contingent consideration arrangement (35 ) Fair value of total consideration transferred $ 6,349 Recognized amounts of identifiable assets acquired and liabilities assumed: Accounts receivable $ 584 Inventory 433 Fixed assets 403 Intangible assets 2,600 Current liabilities (122 ) Identifiable assets, net 3,898 Goodwill 2,451 Total $ 6,349
Summary of Gain on Deferred Purchase Price Liability in Settlement of Contingent Arrangement	In the year ended December 31, 2018, the Company recognized a gain on deferred purchase price liability in settlement of the contingent arrangement as follows (in thousands) Settlement of contingent consideration: Deferred purchase price $ 1,000 Due to Skycross 126 Due from Skycross (362 ) Less consideration paid (375 ) Gain on deferred purchase price $ 389

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2019
Goodwill And Intangible Assets Disclosure [Abstract]
Summary of Acquired Intangible Assets	The following is a summary of the Company’s acquired intangible assets as of December 31 (dollars in thousands) 2019 Weighted average amortization period (years) Gross carrying amount Accumulated amortization Intangibles, net Customer relationships 10 $ 4,830 $ 1,720 $ 3,110 Developed technologies 9 1,080 $ 406 674 Tradename 3 120 $ 107 13 Total $ 6,030 $ 2,233 $ 3,797 2018 Customer relationships 10 $ 4,830 $ 1,237 $ 3,593 Developed technologies 9 1,080 274 806 Tradename 3 120 67 53 Total $ 6,030 $ 1,578 $ 4,452
Schedule of Estimated Annual Amortization of Intangible Assets	The estimated annual amortization of intangible assets for the next five years and thereafter is shown in the following table (actual amortization expense to be reported in future periods could differ from these estimates as a result of acquisitions, divestitures, and asset impairments, among other factors) (in thousands) Estimated future amortization 2020 $ 628 2021 598 2022 563 2023 563 2024 563 Thereafter 882 Total $ 3,797

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Schedule of Income Tax Provisions	The income tax provisions for the years ended December 31 are as follows (in thousands) 2019 2018 2017 Current: U.S. federal $ 145 $ 67 $ 21 State and local 3 6 3 Total current provision 148 73 24 Deferred: U.S. federal 10 23 1 State and local 5 5 1 Total deferred provision 15 28 2 Total tax provision $ 163 $ 101 $ 26
Schedule of Reconciliation of Income Tax Provision to Statutory Federal Income Tax Rate	Reconciliations of the total income tax provision tax rate to the statutory federal income tax rate of 21%, 21%, and 34% for the years ended December 31, 2019, 2018, and 2017, respectively, are as follows (in thousands) 2019 2018 2017 Income taxes at statutory rates $ 229 $ (521 ) $ 397 State income tax, net of federal benefit 8 10 4 Permanent items (11 ) 18 (5 ) Meals and entertainment 50 47 75 Equity based compensation (8 ) (99 ) (646 ) Corporate tax rate change - impact on deferred income taxes — — 2,768 Research and development credit (94 ) (195 ) 207 Federal NOL adjustment — — (386 ) Federal return to provision 101 (168 ) 53 Other federal credits - — 112 Other 145 64 16 Change in federal valuation allowance (257 ) 945 (2,569 ) $ 163 $ 101 $ 26
Deferred Income Tax Assets and Liabilities	The tax effects of temporary differences that give rise to significant portions of the deferred tax assets and deferred tax liabilities at December 31, are as follows (in thousands) 2019 2018 Deferred tax assets: Net operating loss carryforwards $ 4,564 $ 4,924 Research and AMT credits 2,208 2,074 Stock based compensation 387 327 Accrued and other 748 651 7,907 7,976 Less valuation allowance (7,455 ) (7,659 ) Deferred tax assets, net of allowance 452 317 Deferred tax liabilities: Fixed assets (288 ) (192 ) Goodwill (216 ) (163 ) Deferred tax liabilities (504 ) (355 ) Total deferred tax liabilities $ (52 ) $ (38 )
Summary of Reconciliation of Unrecognized Tax Benefit Activity	The following table summarizes the reconciliation of the unrecognized tax benefits activity during the years ended December 31 (in thousands) 2019 2018 Beginning unrecognized tax benefits $ 732 $ 710 Decreases related to prior year tax positions (7 ) (65 ) Increases related to current year tax positions 40 87 Ending unrecognized tax benefits $ 765 $ 732

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	12 Months Ended
	Dec. 31, 2019
Class Of Stock Disclosures [Abstract]
Schedule of Common Stock Reserved for Future Issuance	The following common stock is reserved for future issuance at December 31 (1) (in thousands) 2019 2018 Warrants issued and outstanding 51 51 Stock option awards issued and outstanding 1,600 1,407 Authorized for grants under the 2016 Equity Incentive Plan 401 (2) 463 Authorized for grants under the 2016 Employee Stock Purchase Plan 186 (3) 100 2,238 2,021 (1) (2) (3)

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2019
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Weighted Average Assumptions Used in Estimating Fair Value of Stock Options	As of December 31, 2019 2018 2017 Valuation assumptions: Expected dividend yield 0 % 0 % 0 % Expected volatility 40.78 % 37.60 % 39.37 % Expected term (years) 5.96 5.86 6.06 Risk-free interest rate 2.1 % 2.6 % 1.9 %
Summary of Outstanding Stock Option Activity	A summary of the Company’s stock option activity is as follows (shares in thousands) Number of shares Weighted average exercise price Weighted average remaining contractual term Balance at December 31, 2018 1,407 $ 8.73 Granted 782 11.77 Exercised (176 ) 4.20 Expired/Forfeited (413 ) 11.45 Balance at December 31, 2019 1,600 9.98 7.8 Vested and exercisable at December 31, 2019 746 $ 8.39 6.6 Vested and expected to vest at December 31, 2019 1,600 $ 9.98 7.8
Summary of Outstanding Restricted Stock Unit Activity	The following table summarizes the Company’s Restricted Stock Unit activity (shares in thousands) : Restricted stock units Weighted average grant date fair value Non-vested balance at December 31, 2018 4 $ 13.67 Grants 96 11.35 Vested (1 ) 13.67 Forfeitures (18 ) 11.35 Non-vested balance at December 31, 2019 80 11.43

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2019
Commitments And Contingencies Disclosure [Abstract]
Schedule of Future Minimum Lease Payments Under Operating Leases	The future minimum lease payments required under operating leases in effect at December 31, 2019, were as follows (in thousands) Year ending: 2020 $ 886 2021 395 2022 104 2023 72 2024 33 $ 1,490

Concentration of Credit Risk (T

Concentration of Credit Risk (Tables)	12 Months Ended
	Dec. 31, 2019
Risks And Uncertainties [Abstract]
Schedule of Concentration of Sales and Accounts Receivable	The following represents customers that accounted for 10% or more of total revenue during the years ended December 31, 2019, 2018, and 2017, and customers that accounted for 10% or more of total trade accounts receivable at December 31, 2019 and 2018: For the year ended December 31 2019 2018 2017 Percentage of net revenue Customer A 36 % 36 % 21 % Customer B 14 % 8 % 13 % Customer C 5 % 7 % 10 % As of December 31 2019 2018 Percentage of gross trade accounts receivable Customer A 33 % 32 % Customer B 14 % 0 % Customer C 3 % 14 % Customer D 5 % 14 %

Disaggregated Revenues (Tables)

Disaggregated Revenues (Tables)	12 Months Ended
	Dec. 31, 2019
Revenue From Contract With Customer [Abstract]
Summary of Disaggregated Revenues	Disaggregated revenues for the years ended December 31 are as follows (in thousands) By Sales Channel 2019 2018 2017 Fullfilment distributors $ 32,273 $ 34,389 $ 21,802 OEM/ODM/CM $ 17,075 20,155 21,504 Other $ 6,391 6,081 6,215 Total $ 55,739 $ 60,625 $ 49,521 By Geography 2019 2018 2017 Asia $ 40,810 $ 45,235 $ 33,165 North America 11,611 9,979 8,775 Other 3,318 5,412 7,581 Total $ 55,739 $ 60,625 $ 49,521

Quarterly Financial Informati_2

Quarterly Financial Information (unaudited) (Tables)	12 Months Ended
	Dec. 31, 2019
Quarterly Financial Information Disclosure [Abstract]
Summary of Quarterly Results of Operations	The following is a summary of the quarterly results of operations for the years ended December 31, 2019 and 2018 (in thousands except per share data) For the three months ended 2019 December 31 September 30 June 30 March 31 Sales $ 13,028 $ 13,142 $ 14,462 $ 15,107 Gross profit 5,779 6,075 6,685 6,785 Total operating expenses 5,868 6,280 6,189 6,607 Net income (loss) 63 (135 ) 662 336 Basic net income (loss) per share 0.01 (0.01 ) 0.07 0.03 Diluted net income (loss) per share 0.01 (0.01 ) 0.07 0.03 2018 Sales $ 16,562 $ 15,787 $ 14,972 $ 13,305 Gross profit 6,850 6,865 6,602 6,194 Total operating expenses 5,730 6,558 10,251 7,358 Net income (loss) 1,275 437 (3,190 ) (1,106 ) Basic net loss per share 0.13 0.05 (0.34 ) (0.12 ) Diluted net loss per share 0.13 0.04 (0.34 ) (0.12 )

Significant Accounting Polici_4

Significant Accounting Policies - Additional Information (Details)	12 Months Ended
	Dec. 31, 2019USD ($)Segmentshares	Dec. 31, 2018USD ($)shares	Dec. 31, 2017USD ($)shares
Significant Accounting Policies [Line Items]
Number of operating segments | Segment	1
Allowance for doubtful trade accounts receivable	$ 0	$ 0
Goodwill impairment	0
Contract assets	0
Shipping and other transportation costs	$ 278,000	$ 433,000	$ 462,000
Type of Cost, Good or Service [Extensible List]	us-gaap:ShippingAndHandlingMember	us-gaap:ShippingAndHandlingMember	us-gaap:ShippingAndHandlingMember
Advertising costs	$ 28,000	$ 2,526,000	$ 16,000
Stock-based compensation	$ 2,204,000	$ 2,910,000	$ 736,000
Diluted weighted average common shares outstanding | shares	10,097,000	9,521,000	10,361,000
Warrant
Significant Accounting Policies [Line Items]
Diluted weighted average common shares outstanding | shares	1,000	1,000	2,000
Options Outstanding
Significant Accounting Policies [Line Items]
Diluted weighted average common shares outstanding | shares	412,000	412,000	874,000
Minimum
Significant Accounting Policies [Line Items]
Property and equipment, estimated useful life	3 years
Maximum
Significant Accounting Policies [Line Items]
Property and equipment, estimated useful life	15 years

Significant Accounting Polici_5

Significant Accounting Policies - Summary of Computation of Net Income or (Loss) Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Numerator:
Net income (loss)	$ 63	$ (135)	$ 662	$ 336	$ 1,275	$ 437	$ (3,190)	$ (1,106)	$ 926	$ (2,584)	$ 1,141
Weighted average shares used in calculating income (loss) per share
Basic									9,684	9,521	9,485
Diluted									10,097	9,521	10,361
Net income (loss) per share:
Basic	$ 0.01	$ (0.01)	$ 0.07	$ 0.03	$ 0.13	$ 0.05	$ (0.34)	$ (0.12)	$ 0.10	$ (0.27)	$ 0.12
Diluted	$ 0.01	$ (0.01)	$ 0.07	$ 0.03	$ 0.13	$ 0.04	$ (0.34)	$ (0.12)	$ 0.09	$ (0.27)	$ 0.11

Significant Accounting Polici_6

Significant Accounting Policies - Summary of Potentially Dilutive Securities (Details) - shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Potentially dilutive securities not included in the calculation of diluted net loss per share	402	1,029	514
Stock Options
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Potentially dilutive securities not included in the calculation of diluted net loss per share	402	978	514
Warrants outstanding
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Potentially dilutive securities not included in the calculation of diluted net loss per share		51

Cash, Cash Equivalents and Sh_3

Cash, Cash Equivalents and Short-Term Investments - Schedule of Cash and Cash Equivalents and Short-term Investments by Significant Investment Category (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Cash And Cash Equivalents And Short Term Investments [Line Items]
Cash	$ 3,950	$ 3,044
Short term investments Gross Unrealized Gains	10
Short term investments Gross Unrealized Losses	(2)	(10)
Short term investments	21,686	20,169
Cash and cash equivalents and Short term investments, Amortized Cost	34,875	33,799
Cash and cash equivalents and Short term investments, Estimated Fair Value	34,883	33,790
Cash and cash equivalents	13,197	13,621
Level 1
Cash And Cash Equivalents And Short Term Investments [Line Items]
Short term investments Gross Unrealized Gains	2
Short term investments Gross Unrealized Losses	(1)
Cash equivalents and Short term investments, Estimated Fair Value	8,579	7,470
Cash equivalents and Short term investments, Amortized Cost	8,578	7,470
Level 2
Cash And Cash Equivalents And Short Term Investments [Line Items]
Short term investments Gross Unrealized Gains	8
Short term investments Gross Unrealized Losses	(1)	(10)
Short term investments	18,607	18,181
Cash equivalents and Short term investments, Estimated Fair Value	22,354	23,276
Cash and cash equivalents	3,747	5,095
Cash equivalents and Short term investments, Amortized Cost	22,347	23,285
Money Market Funds | Level 1
Cash And Cash Equivalents And Short Term Investments [Line Items]
Cash equivalents	5,500	5,482
Repurchase Agreements | Level 2
Cash And Cash Equivalents And Short Term Investments [Line Items]
Cash equivalents	3,000	3,000
US Treasury Securities | Level 1
Cash And Cash Equivalents And Short Term Investments [Line Items]
Short Term Investments Amortized Cost	3,078	1,988
Short term investments Gross Unrealized Gains	2
Short term investments Gross Unrealized Losses	(1)
Short term investments	3,079	1,988
Commercial Paper | Level 2
Cash And Cash Equivalents And Short Term Investments [Line Items]
Cash equivalents	747	2,095
Short Term Investments Amortized Cost	8,920	10,639
Short term investments	8,173	8,544
Cash equivalents and Short term investments, Estimated Fair Value	8,920	10,639
Corporate Debt Securities | Level 2
Cash And Cash Equivalents And Short Term Investments [Line Items]
Short Term Investments Amortized Cost	5,922	5,964
Short term investments Gross Unrealized Gains	5
Short term investments Gross Unrealized Losses	(1)	(7)
Short term investments	5,926	5,957
Asset-backed Securities | Level 2
Cash And Cash Equivalents And Short Term Investments [Line Items]
Short Term Investments Amortized Cost	4,505	3,682
Short term investments Gross Unrealized Gains	3
Short term investments Gross Unrealized Losses		(3)
Short term investments	4,508	3,680
Cash equivalents and Short term investments, Estimated Fair Value	$ 4,508	$ 3,680

Cash, Cash Equivalents and Sh_4

Cash, Cash Equivalents and Short-Term Investments - Schedule of Short-Term Investments (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Cash And Cash Equivalents And Short Term Investments [Line Items]
Short-term investments in continuous unrealized loss position for 12 months or less, Estimated fair value	$ 3,399	$ 10,977
Short-term investments in continuous unrealized loss position for 12 months or less, Unrealized losses	(2)	(10)
US Treasury Securities
Cash And Cash Equivalents And Short Term Investments [Line Items]
Short-term investments in continuous unrealized loss position for 12 months or less, Estimated fair value	1,218	1,988
Short-term investments in continuous unrealized loss position for 12 months or less, Unrealized losses	(1)
Corporate Debt Securities
Cash And Cash Equivalents And Short Term Investments [Line Items]
Short-term investments in continuous unrealized loss position for 12 months or less, Estimated fair value	1,428	5,957
Short-term investments in continuous unrealized loss position for 12 months or less, Unrealized losses	(1)	(7)
Asset-backed Securities
Cash And Cash Equivalents And Short Term Investments [Line Items]
Short-term investments in continuous unrealized loss position for 12 months or less, Estimated fair value	$ 753	3,032
Short-term investments in continuous unrealized loss position for 12 months or less, Unrealized losses		$ (3)

Cash, Cash Equivalents and Sh_5

Cash, Cash Equivalents and Short-Term Investments - Additional Information (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Investments Debt And Equity Securities [Abstract]
Estimated fair value of contractual maturities of short-term investments	$ 21,686	$ 20,169

Property and Equipment - Additi

Property and Equipment - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Property Plant And Equipment [Line Items]
Depreciation expense	$ 493,000	$ 587,000	$ 436,000
Loss on disposal of fixed assets		$ 39,000
Minimum
Property Plant And Equipment [Line Items]
Property and equipment, estimated useful Life	3 years
Maximum
Property Plant And Equipment [Line Items]
Property and equipment, estimated useful Life	15 years
Tenant Improvement | Minimum
Property Plant And Equipment [Line Items]
Property and equipment, estimated useful Life	6 years
Tenant Improvement | Maximum
Property Plant And Equipment [Line Items]
Property and equipment, estimated useful Life	10 years
Other Property and Equipment | Minimum
Property Plant And Equipment [Line Items]
Property and equipment, estimated useful Life	3 years
Other Property and Equipment | Maximum
Property Plant And Equipment [Line Items]
Property and equipment, estimated useful Life	15 years

Property and Equipment - Schedu

Property and Equipment - Schedule of Property and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 5,226	$ 4,098
Less accumulated depreciation	(3,118)	(2,697)
Property and equipment, net	2,108	1,401
Computers and Software
Property Plant And Equipment [Line Items]
Property and equipment, gross	572	361
Furniture, Fixtures, and Equipment
Property Plant And Equipment [Line Items]
Property and equipment, gross	299	339
Manufacturing and Testing Equipment
Property Plant And Equipment [Line Items]
Property and equipment, gross	3,444	2,503
Leasehold Improvements
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 911	$ 895

Acquisitions - Summary of Alloc

Acquisitions - Summary of Allocation of Purchase Price for Acquired Identifiable Assets, Liabilities Assumed and Goodwill (Details) - USD ($) $ in Thousands	Apr. 27, 2017	Dec. 31, 2017	Dec. 31, 2019	Dec. 31, 2018
Consideration:
Cash		$ 6,349
Recognized amounts of identifiable assets acquired and liabilities assumed:
Goodwill			$ 3,700	$ 3,700
Antenna Plus
Consideration:
Cash	$ 6,384
Contingent consideration arrangement	(35)
Fair value of total consideration transferred	6,349
Recognized amounts of identifiable assets acquired and liabilities assumed:
Accounts receivable	584
Inventory	433
Fixed assets	403
Intangible assets	2,600
Current liabilities	(122)
Identifiable assets, net	3,898
Goodwill	2,451
Total	$ 6,349

Acquisitions - Additional Infor

Acquisitions - Additional Information (Details) - USD ($) $ in Thousands	Apr. 27, 2017	Dec. 17, 2015	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Business Acquisition [Line Items]
Business acquisition, sales			$ 13,028	$ 13,142	$ 14,462	$ 15,107	$ 16,562	$ 15,787	$ 14,972	$ 13,305	$ 55,739	$ 60,625	$ 49,521
Business acquisition, cost of goods sold											30,415	34,114	26,219
Business acquisition, net income			$ 63	$ (135)	$ 662	$ 336	$ 1,275	$ 437	$ (3,190)	$ (1,106)	$ 926	$ (2,584)	1,141
Antenna Plus
Business Acquisition [Line Items]
Business acquisition, sales													5,200
Business acquisition, cost of goods sold													2,300
Business acquisition, net income													$ 400
Business acquisition, purchase price	$ 6,349
Skycross, Inc.
Business Acquisition [Line Items]
Date of asset purchase agreement		Dec. 17, 2015
Business acquisition, purchase price		$ 4,000

Acquisitions - Summary of Gain

Acquisitions - Summary of Gain on Deferred Purchase Price Liability in Settlement of Contingent Arrangement (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Business Acquisition [Line Items]
Due to Skycross			$ 6,349
Less consideration paid		$ (375)
Gain on deferred purchase price		$ 389
Skycross, Inc.
Business Acquisition [Line Items]
Deferred purchase price	$ 1,000
Due to Skycross	126
Due from Skycross	(362)
Less consideration paid	(375)
Gain on deferred purchase price	$ 389

Goodwill and Intangible Asset_2

Goodwill and Intangible Assets - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Goodwill And Intangible Assets Disclosure [Abstract]
Change in goodwill balance	$ 0	$ 0
Amortization	$ 655,000	$ 677,000	$ 581,000

Goodwill and Intangible Asset_3

Goodwill and Intangible Assets - Summary of Acquired Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Acquired Finite Lived Intangible Assets [Line Items]
Gross carrying amount	$ 6,030	$ 6,030
Accumulated amortization	2,233	1,578
Intangibles, net	$ 3,797	$ 4,452
Customer relationships
Acquired Finite Lived Intangible Assets [Line Items]
Weighted average amortization period (years)	10 years	10 years
Gross carrying amount	$ 4,830	$ 4,830
Accumulated amortization	1,720	1,237
Intangibles, net	$ 3,110	$ 3,593
Developed technologies
Acquired Finite Lived Intangible Assets [Line Items]
Weighted average amortization period (years)	9 years	9 years
Gross carrying amount	$ 1,080	$ 1,080
Accumulated amortization	406	274
Intangibles, net	$ 674	$ 806
Tradename
Acquired Finite Lived Intangible Assets [Line Items]
Weighted average amortization period (years)	3 years	3 years
Gross carrying amount	$ 120	$ 120
Accumulated amortization	107	67
Intangibles, net	$ 13	$ 53

Goodwill and Intangible Asset_4

Goodwill and Intangible Assets - Schedule of Estimated Annual Amortization of Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Goodwill And Intangible Assets Disclosure [Abstract]
2020	$ 628
2021	598
2022	563
2023	563
2024	563
Thereafter	882
Intangibles, net	$ 3,797	$ 4,452

Long-term Notes Payable (Incl_2

Long-term Notes Payable (Including Current Portion) and Line of Credit - Additional Information (Details) - USD ($)	Feb. 01, 2017	Jan. 31, 2018	Dec. 31, 2015	Dec. 31, 2013	Dec. 31, 2019	Dec. 31, 2017
Loan Agreement With Silicon Valley Bank
Line Of Credit Facility [Line Items]
Loan agreement amount			$ 4,000,000
Term of payments			36 months
Date of maturity			Dec. 1, 2018
Interest rate fixed percentage			5.00%
Silicon Valley Bank | Revolving Credit Facility
Line Of Credit Facility [Line Items]
Line of credit facility allowable amount		$ 10,000,000				$ 3,000,000
Line of credit facility maturity date					Jan. 31, 2020
Line of credit					$ 0
Line of credit facility borrowing base limitation percentage of eligible receivables		80.00%
Liquidity ratio		125.00%
Interest rate fixed percentage		$ 3,000
Line of credit facility floating rate not met		2.00%			4.75%
Silicon Valley Bank | Revolving Credit Facility | The Wall Street Journal Prime Rate
Line Of Credit Facility [Line Items]
Basis spread on variable interest rate		1.00%			4.75%
Line of credit facility interest rate description					The Company will be required to pay interest on borrowings outstanding, if any, under the revolving line of credit at a floating rate per annum equal to 1% above the Wall Street Journal prime rate (4.75% as of December 31, 2019) (or, if unavailable, the Silicon Valley Bank prime rate) on a monthly basis, so long as the Company maintains a liquidity ratio of cash and cash equivalents plus accounts receivable to outstanding debt under the Amended Loan Agreement minus deferred revenue of 1.50 to 1.00. If this liquidity ratio is not met, the Company will be subject to a minimum interest charge of $3 thousand per month and borrowings outstanding, if any, under the revolving line of credit will accrue interest at a floating rate per annum equal to 2% above the Wall Street Journal prime rate (4.75% as of December 31, 2019) (or, if unavailable the Silicon Valley Bank prime rate) on a monthly basis. Prior to the amendment in January 2018, the revolving line of credit bore interest rate at the U.S. prime rate plus 1.25%. The revolving line of credit matured on January 31, 2020 and was not renewed.
Silicon Valley Bank | Revolving Credit Facility | Prime Rate
Line Of Credit Facility [Line Items]
Liquidity ratio		150.00%
Silicon Valley Bank | Revolving Credit Facility | U.S. Prime Rate
Line Of Credit Facility [Line Items]
Basis spread on variable interest rate		1.25%
Silicon Valley Bank | Revolving Credit Facility | Growth Capital Term Loan
Line Of Credit Facility [Line Items]
Line of credit facility allowable amount				$ 750,000
Line of credit facility maturity date					Feb. 1, 2017
Payment of principal and accrued interest	$ 55,000
Line of credit facility interest rate				6.50%
Line of credit					$ 0

Treasury Stock - Additional Inf

Treasury Stock - Additional Information (Details) - Common Stock - USD ($) $ / shares in Units, $ in Millions	Dec. 31, 2019	Sep. 09, 2019	Aug. 07, 2018	Aug. 31, 2017	Dec. 31, 2019	Dec. 31, 2018
Share Repurchase Program August 2017
Equity Class Of Treasury Stock [Line Items]
Stock approved for repurchase, value				$ 7
Period of stock repurchase program				12 months
Additional period of stock repurchase program			12 months
Share Repurchase Program September 9, 2019
Equity Class Of Treasury Stock [Line Items]
Stock approved for repurchase, value		$ 7
Period of stock repurchase program		12 months
Share Repurchase Program August 2017 and September 2019
Equity Class Of Treasury Stock [Line Items]
Stock repurchase, shares	465,000				108,000	222,000
Stock repurchase, weighted average price per share	$ 10.02				$ 11.41	$ 9.92
Stock repurchase, cost	$ 4.7				$ 1.2	$ 2.2

Income Taxes - Schedule of Inco

Income Taxes - Schedule of Income Tax Provisions (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current:
U.S. federal	$ 145	$ 67	$ 21
State and local	3	6	3
Total current provision	148	73	24
Deferred:
U.S. federal	10	23	1
State and local	5	5	1
Total deferred provision	15	28	2
Total tax provision	$ 163	$ 101	$ 26

Income Taxes - Additional Infor

Income Taxes - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Taxes [Line Items]
U.S. federal statutory tax rate	21.00%	21.00%	34.00%
Valuation allowance	$ 7,455,000	$ 7,659,000
Cumulative change in ownership percentage	50.00%
Period for cumulative change in ownership	3 years
Unrecognized tax benefit that would impact effective tax rate, if recognized	$ 9,000
Income tax interest and penalties accrued	3,000	2,000
Income tax interest and penalties	1,000	1,000	$ 1,000
California
Income Taxes [Line Items]
Net operating loss carry forwards	$ 5,700,000
Net operating loss carry forwards, expire period	2028
Federal
Income Taxes [Line Items]
Net operating loss carry forwards	$ 19,000,000
Net operating loss carry forwards, expire period	2020
Operating loss carryforward available to offset future taxable income		$ 1,600,000
Percentage of future taxable income offset by operating loss carryforward	80.00%
Tax credit carry forwards	$ 1,500,000
Tax credit carry forwards, expire period	2026
State
Income Taxes [Line Items]
Tax credit carry forwards	$ 1,500,000

Income Taxes - Schedule of Reco

Income Taxes - Schedule of Reconciliation of Income Tax Provision to Statutory Federal Income Tax Rate (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Expense Benefit Continuing Operations Income Tax Reconciliation [Abstract]
Income taxes at statutory rates	$ 229	$ (521)	$ 397
State income tax, net of federal benefit	8	10	4
Permanent items	(11)	18	(5)
Meals and entertainment	50	47	75
Equity based compensation	(8)	(99)	(646)
Corporate tax rate change - impact on deferred income taxes			2,768
Research and development credit	(94)	(195)	207
Federal NOL adjustment			(386)
Federal return to provision	101	(168)	53
Other federal credits			112
Other	145	64	16
Change in federal valuation allowance	(257)	945	(2,569)
Total tax provision	$ 163	$ 101	$ 26

Income Taxes - Deferred Income

Income Taxes - Deferred Income Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Deferred tax assets:
Net operating loss carryforwards	$ 4,564	$ 4,924
Research and AMT credits	2,208	2,074
Stock based compensation	387	327
Accrued and other	748	651
Deferred Tax Assets, Gross	7,907	7,976
Less valuation allowance	(7,455)	(7,659)
Deferred tax assets, net of allowance	452	317
Deferred tax liabilities:
Fixed assets	(288)	(192)
Goodwill	(216)	(163)
Deferred tax liabilities	(504)	(355)
Total deferred tax liabilities	$ (52)	$ (38)

Income Taxes - Summary of Recon

Income Taxes - Summary of Reconciliation of Unrecognized Tax Benefit Activity (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Beginning unrecognized tax benefits	$ 732	$ 710
Decreases related to prior year tax positions	(7)	(65)
Increases related to current year tax positions	40	87
Ending unrecognized tax benefits	$ 765	$ 732

Stockholders' Equity - Schedule

Stockholders' Equity - Schedule of Common Stock Reserved for Future Issuance (Details) - shares	Dec. 31, 2019	Dec. 31, 2018
Class Of Stock [Line Items]
Common stock, reserved for future issuance	2,238,000	2,021,000
Warrants Issued and Outstanding
Class Of Stock [Line Items]
Common stock, reserved for future issuance	51,000	51,000
Stock Option Awards Issued and Outstanding
Class Of Stock [Line Items]
Common stock, reserved for future issuance	1,600,000	1,407,000
Authorized for Grants under the 2016 Equity Incentive Plan
Class Of Stock [Line Items]
Common stock, reserved for future issuance	401,000	463,000
Authorized for grants under the 2016 Employee Stock Purchase Plan
Class Of Stock [Line Items]
Common stock, reserved for future issuance	186,000	100,000

Stockholders' Equity - Schedu_2

Stockholders' Equity - Schedule of Common Stock Reserved for Future Issuance (Parenthetical) (Details) - shares	Jan. 01, 2019	Dec. 31, 2019	Dec. 31, 2018
Class Of Stock [Line Items]
Treasury stock, shares at cost		465,000	357,000
2016 Equity Incentive Plan
Class Of Stock [Line Items]
Number of authorized shares increased	384,045
2016 Employee Stock Purchase Plan
Class Of Stock [Line Items]
Number of authorized shares increased	96,000

Stock Based Compensation - Addi

Stock Based Compensation - Additional Information (Details) - USD ($)	1 Months Ended	12 Months Ended
	Aug. 31, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock, reserved for future issuance		2,238,000	2,021,000
Weighted average grant-date fair value of options granted		$ 4.93	$ 3.97	$ 6.02
Stock options vested aggregate intrinsic value		$ 2,300,000	$ 2,500,000	$ 3,600,000
Stock options expected to vest aggregate intrinsic value		300,000	1,000,000	1,500,000
Grant date fair value of shares vested		$ 2,100,000	2,800,000	300,000
Employee Stock Purchase Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Offering period of employee stock purchase plan		6 months
Limited percentage of annual contribution		20.00%
Percentage of discount and fair value of option		15.00%
Proceeds from stock issued during period	$ 97,000
Number of stock issued during period	10,000
Restricted Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total unrecognized compensation cost		$ 2,300,000	$ 2,800,000	$ 2,500,000
Total unrecognized compensation cost, period for recognition		3 years
Restricted Stock Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total unrecognized compensation cost		$ 600,000
Total unrecognized compensation cost, period for recognition		2 years 8 months 12 days
Restricted stock units, Grants		96,000
Weighted average grant date fair value, Grants		$ 11.35
Restricted stock units, vesting period description		shares vest equally on each of the annual anniversaries over a four-year period
Restricted Stock Units | Employees
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Restricted stock units, Grants		81,000
Weighted average grant date fair value, Grants		$ 11.46
Restricted stock units, vesting period		4 years
Non-Employee Board of Directors
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of stock option value awarded per year		$ 30,000
Non-Employee Board of Directors | Restricted Stock Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of restricted stock units value awarded per year		30,000
Board of Directors
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of stock option value awarded per year		45,000
Board of Directors | Restricted Stock Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of restricted stock units value awarded per year		$ 45,000
Restricted stock units, Grants		14,000	4,000
Weighted average grant date fair value, Grants		$ 10.75	$ 12.62
Restricted stock units, vesting period description		shares vest on the first anniversary of the grant date	shares vest equally on each of the annual anniversaries over a three-year period.
Restricted stock units, vesting period			3 years
Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Service period for stock options granted to employees		1 year
Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Service period for stock options granted to employees		4 years
Maximum | Employee Stock Purchase Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Purchase price percentage of market value of common stock		85.00%
Authorized for Grants under the 2016 Equity Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock, reserved for future issuance		401,000	463,000

Stock Based Compensation - Weig

Stock Based Compensation - Weighted Average Assumptions Used in Estimating Fair Value of Stock Options (Details)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Share-based compensation arrangement by share-based payment award, Fair value assumptions and methodology
Expected dividend yield	0.00%	0.00%	0.00%
Expected volatility	40.78%	37.60%	39.37%
Expected term (years)	5 years 11 months 15 days	5 years 10 months 9 days	6 years 21 days
Risk-free interest rate	2.10%	2.60%	1.90%

Stock Based Compensation - Summ

Stock Based Compensation - Summary of Outstanding Stock Option Activity (Details) - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Number of shares, Beginning balance	1,407,000
Number of shares, Granted	782,000
Number of shares, Exercised	(176,000)
Number of shares, Expired/Forfeited	(413,000)
Number of shares, Ending balance	1,600,000	1,407,000
Number of shares, Vested and exercisable	746,000
Number of shares, Vested and expected to vest	1,600,000
Weighted average exercise price, Beginning balance	$ 8.73
Weighted average exercise price, Granted	11.77
Weighted average exercise price, Exercised	4.20
Weighted average exercise price, Expired/Forfeited	11.45
Weighted average exercise price, Ending balance	9.98	$ 8.73
Weighted average exercise price, Vested and exercisable	8.39
Weighted average exercise price, Vested and expected to vest	$ 9.98
Weighted average remaining contractual term	7 years 9 months 18 days	8 years 1 month 6 days
Weighted average remaining contractual term, Granted	6 years 10 months 24 days
Weighted average remaining contractual term, Exercised	2 years
Weighted average remaining contractual term, Expired/Forfeited	1 month 6 days
Weighted average remaining contractual term, Vested and exercisable	6 years 7 months 6 days
Weighted average remaining contractual term, Vested and expected to vest	7 years 9 months 18 days

Stock Based Compensation - Su_2

Stock Based Compensation - Summary of Outstanding Restricted Stock Unit Activity (Details) - Restricted Stock Units shares in Thousands	12 Months Ended
	Dec. 31, 2019$ / sharesshares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Restricted stock units, Beginning balance | shares	4
Restricted stock units, Grants | shares	96
Restricted stock units, Vested | shares	(1)
Restricted stock units, Forfeitures | shares	(18)
Restricted stock units, Ending balance | shares	80
Weighted average grant date fair value, Beginning balance | $ / shares	$ 13.67
Weighted average grant date fair value, Grants | $ / shares	11.35
Weighted average grant date fair value, Vested | $ / shares	13.67
Weighted average grant date fair value, Forfeitures | $ / shares	11.35
Weighted average grant date fair value, Ending balance | $ / shares	$ 11.43

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Detail) - USD ($)	Aug. 08, 2019	Feb. 29, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Mar. 13, 2019	Jan. 16, 2019
James K. Sims
Commitment And Contingencies [Line Items]
Employment agreement expiration period	Feb. 9, 2020
Office Space Lease Agreement | Subsequent Event
Commitment And Contingencies [Line Items]
Operating lease maturity year		2025
Additional lease payment		$ 3,200,000
Additional lease payment one to three years		1,212,000
Additional lease payment three to five years		1,300,000
Additional lease payment after five years		$ 600,000
Minimum | James K. Sims
Commitment And Contingencies [Line Items]
Contingent Severance cost						$ 400,000
Minimum | President, Chief Financial Officer and Secretary and Senior Vice President
Commitment And Contingencies [Line Items]
Contingent Severance cost							$ 455,000
Office Space and Research Facilities Lease
Commitment And Contingencies [Line Items]
Operating leases, rent expense			$ 973,000	$ 912,000	$ 805,000
Lease agreement description			The San Diego facility lease agreement included a tenant improvement allowance which provided for the landlord to pay for tenant improvements on behalf of the Company up to $515,000. Based on the terms of this landlord incentive and involvement of the Company in the construction process, the leasehold improvements purchased under the landlord incentive were determined to be property of the Company.
Lease expiration date			Nov. 30, 2024
Office Space and Research Facilities Lease | Maximum
Commitment And Contingencies [Line Items]
Payments for tenant improvements allowance			$ 515,000

Commitments and Contingencies_2

Commitments and Contingencies - Schedule of Future Minimum Lease Payments Under Operating Leases (Detail) $ in Thousands	Dec. 31, 2019USD ($)
Future minimum lease payment
2020	$ 886
2021	395
2022	104
2023	72
2024	33
Total future minimum lease payment	$ 1,490

Concentration of Credit Risk -

Concentration of Credit Risk - Additional Information (Details) - Vendor	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
China
Concentration Risk [Line Items]
Number of vendors	2	2	2
Customer Concentration Risk | Net Revenue
Concentration Risk [Line Items]
Concentration risk percentage	10.00%	10.00%	10.00%
Customer Concentration Risk | Trade Accounts Receivable
Concentration Risk [Line Items]
Concentration risk percentage	10.00%	10.00%

Concentration of Credit Risk _2

Concentration of Credit Risk - Schedule of Concentration of Sales and Accounts Receivable (Details) - Customer Concentration Risk	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Net Revenue
Concentration Risk [Line Items]
Concentration risk percentage	10.00%	10.00%	10.00%
Net Revenue | Customer A
Concentration Risk [Line Items]
Concentration risk percentage	36.00%	36.00%	21.00%
Net Revenue | Customer B
Concentration Risk [Line Items]
Concentration risk percentage	14.00%	8.00%	13.00%
Net Revenue | Customer C
Concentration Risk [Line Items]
Concentration risk percentage	5.00%	7.00%	10.00%
Trade Accounts Receivable
Concentration Risk [Line Items]
Concentration risk percentage	10.00%	10.00%
Trade Accounts Receivable | Customer A
Concentration Risk [Line Items]
Concentration risk percentage	33.00%	32.00%
Trade Accounts Receivable | Customer B
Concentration Risk [Line Items]
Concentration risk percentage	14.00%	0.00%
Trade Accounts Receivable | Customer C
Concentration Risk [Line Items]
Concentration risk percentage	3.00%	14.00%
Trade Accounts Receivable | Customer D
Concentration Risk [Line Items]
Concentration risk percentage	5.00%	14.00%

Disaggregated Revenues - Summar

Disaggregated Revenues - Summary of Disaggregated Revenues By Sales Channel (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Disaggregation Of Revenue [Line Items]
Disaggregated revenues	$ 13,028	$ 13,142	$ 14,462	$ 15,107	$ 16,562	$ 15,787	$ 14,972	$ 13,305	$ 55,739	$ 60,625	$ 49,521
Fullfilment Distributors
Disaggregation Of Revenue [Line Items]
Disaggregated revenues									32,273	34,389	21,802
OEM/ODM/CM
Disaggregation Of Revenue [Line Items]
Disaggregated revenues									17,075	20,155	21,504
Other
Disaggregation Of Revenue [Line Items]
Disaggregated revenues									$ 6,391	$ 6,081	$ 6,215

Disaggregated Revenues - Summ_2

Disaggregated Revenues - Summary of Disaggregated Revenues By Geography (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Disaggregation Of Revenue [Line Items]
Disaggregated revenues	$ 13,028	$ 13,142	$ 14,462	$ 15,107	$ 16,562	$ 15,787	$ 14,972	$ 13,305	$ 55,739	$ 60,625	$ 49,521
Asia
Disaggregation Of Revenue [Line Items]
Disaggregated revenues									40,810	45,235	33,165
North America
Disaggregation Of Revenue [Line Items]
Disaggregated revenues									11,611	9,979	8,775
Other
Disaggregation Of Revenue [Line Items]
Disaggregated revenues									$ 3,318	$ 5,412	$ 7,581

Termination Costs - Additional

Termination Costs - Additional Information (Details) - USD ($)	Jun. 30, 2018	May 02, 2018	Apr. 02, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Restructuring Cost And Reserve [Line Items]
Stock compensation expense				$ 2,204,000	$ 2,910,000	$ 736,000
Mr. Charles Myers
Restructuring Cost And Reserve [Line Items]
Unvested options shares		283,000
Number of monthly premiums for disability insurance		12 months
Mr. Charles Myers | One Time Benefit
Restructuring Cost And Reserve [Line Items]
Severance amount paid in cash		$ 484,000
Mr. Charles Myers | Other Employment Benefits
Restructuring Cost And Reserve [Line Items]
Severance amount paid in cash		20,000
Mr. Charles Myers | Disability Insurance Plan
Restructuring Cost And Reserve [Line Items]
Severance amount paid in cash		$ 3,000
Mr. Selbo
Restructuring Cost And Reserve [Line Items]
Severance amount paid in cash			$ 150,000
Sales and Marketing Expense
Restructuring Cost And Reserve [Line Items]
Agreement termination costs	$ 1,300,000
Sales and Marketing Expense | Mr. Selbo
Restructuring Cost And Reserve [Line Items]
Stock compensation expense			$ 44,000
General and Administrative Expense | Mr. Charles Myers
Restructuring Cost And Reserve [Line Items]
Stock compensation expense					$ 1,200,000

Employee Benefit Plan - Additio

Employee Benefit Plan - Additional Information (Detail)	Dec. 31, 2019
Postemployment Benefits [Abstract]
401(k) plan - Defined Contribution Plan, Sponsor Location [Extensible List]	country:US
401(k) plan - Defined Contribution Plan, Tax Status [Extensible List]	us-gaap:QualifiedPlanMember

Quarterly Financial Informati_3

Quarterly Financial Information (unaudited) - Summary of Quarterly Results of Operations (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Quarterly Financial Information Disclosure [Abstract]
Sales	$ 13,028	$ 13,142	$ 14,462	$ 15,107	$ 16,562	$ 15,787	$ 14,972	$ 13,305	$ 55,739	$ 60,625	$ 49,521
Gross profit	5,779	6,075	6,685	6,785	6,850	6,865	6,602	6,194	25,324	26,511	23,302
Total operating expenses	5,868	6,280	6,189	6,607	5,730	6,558	10,251	7,358	24,944	29,897	22,333
Net income (loss)	$ 63	$ (135)	$ 662	$ 336	$ 1,275	$ 437	$ (3,190)	$ (1,106)	$ 926	$ (2,584)	$ 1,141
Basic net income (loss) per share	$ 0.01	$ (0.01)	$ 0.07	$ 0.03	$ 0.13	$ 0.05	$ (0.34)	$ (0.12)	$ 0.10	$ (0.27)	$ 0.12
Diluted net income (loss) per share	$ 0.01	$ (0.01)	$ 0.07	$ 0.03	$ 0.13	$ 0.04	$ (0.34)	$ (0.12)	$ 0.09	$ (0.27)	$ 0.11