PC Tel (PCTI) 10-Q 12 Nov 19 2019 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2019	Nov. 12, 2019
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q3
Entity Registrant Name	PC TEL INC
Entity Central Index Key	0001057083
Entity Incorporation, State or Country Code	DE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Title of 12(b) Security	Common Stock
Trading Symbol	PCTI
Security Exchange Name	NASDAQ
Entity File Number	000-27115
Entity Tax Identification Number	77-0364943
Entity Address, Address Line One	471 Brighton Drive
Entity Address, City or Town	Bloomingdale
Entity Address, State or Province	IL
Entity Address, Postal Zip Code	60108
City Area Code	630
Local Phone Number	372-6800
Entity Common Stock Shares Outstanding		18,582,338
Document Quarterly Report	true
Document Transition Report	false

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
ASSETS
Cash and cash equivalents	$ 5,647	$ 4,329
Short-term investment securities	32,419	30,870
Accounts receivable, net of allowances of $95 and $63 at September 30, 2019 and December 31, 2018, respectively	17,117	15,864
Inventories, net	13,577	12,848
Prepaid expenses and other assets	1,087	1,416
Total current assets	69,847	65,327
Property and equipment, net	11,109	12,138
Goodwill	3,332	3,332
Intangible assets, net	359	1,029
Other noncurrent assets	3,220	45
TOTAL ASSETS	87,867	81,871
LIABILITIES AND STOCKHOLDERS’ EQUITY
Accounts payable	4,992	6,083
Accrued liabilities	8,427	5,801
Total current liabilities	13,419	11,884
Long-term liabilities	2,970	381
Total liabilities	16,389	12,265
Stockholders’ equity:
Common stock, $0.001 par value, 100,000,000 shares authorized, 18,572,493 and 18,271,249 shares issued and outstanding at September 30, 2019 and December 31, 2018, respectively	19	18
Additional paid-in capital	134,034	133,859
Accumulated deficit	(62,103)	(64,055)
Accumulated other comprehensive loss	(472)	(216)
Total stockholders’ equity	71,478	69,606
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 87,867	$ 81,871

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Statement Of Financial Position [Abstract]
Allowance for accounts receivable	$ 95	$ 63
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	18,572,493	18,572,493
Common stock, shares outstanding	18,271,249	18,271,249

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations (unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Statement [Abstract]
REVENUES	$ 23,630	$ 18,426	$ 67,720	$ 61,739
COST OF REVENUES	12,983	11,705	37,720	39,355
GROSS PROFIT	10,647	6,721	30,000	22,384
OPERATING EXPENSES:
Research and development	3,214	3,028	9,223	9,021
Sales and marketing	2,935	2,957	8,830	9,059
General and administrative	3,214	3,029	10,381	9,172
Amortization of intangible assets	48	85	170	333
Restructuring expenses	295	0	295	0
Total operating expenses	9,706	9,099	28,899	27,585
OPERATING INCOME (LOSS)	941	(2,378)	1,101	(5,201)
Other income, net	393	226	874	486
INCOME (LOSS) BEFORE INCOME TAXES	1,334	(2,152)	1,975	(4,715)
Expense (benefit) for income taxes	6	(482)	23	(961)
NET INCOME (LOSS)	$ 1,328	$ (1,670)	$ 1,952	$ (3,754)
Net Income (Loss) per Share:
Basic	$ 0.07	$ (0.10)	$ 0.11	$ (0.22)
Diluted	$ 0.07	$ (0.10)	$ 0.11	$ (0.22)
Weighted Average Shares:
Basic	17,922	17,234	17,792	17,145
Diluted	18,181	17,234	18,105	17,145
Cash dividend per share	$ 0.055	$ 0.055	$ 0.155	$ 0.155

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Comprehensive Income (Loss) (unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Statement Of Income And Comprehensive Income [Abstract]
NET INCOME (LOSS)	$ 1,328	$ (1,670)	$ 1,952	$ (3,754)
OTHER COMPREHENSIVE LOSS:
Foreign currency translation adjustments	(261)	(223)	(256)	(327)
COMPREHENSIVE INCOME (LOSS)	$ 1,067	$ (1,893)	$ 1,696	$ (4,081)

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Stockholders' Equity (unaudited) - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid - In Capital [Member]	Retained Deficit [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
BALANCE at beginning of year at Dec. 31, 2017	$ 83,319	$ 18	$ 134,505	$ (51,258)	$ 54
Cumulative-effect adjustment resulting from adoption of ASU 2016-16 at Dec. 31, 2017	92	0	0	92	0
BALANCE at beginning of year, as adjusted at Dec. 31, 2017	83,411	18	134,505	(51,166)	54
Stock-based compensation expense	2,572	0	2,572	0	0
Issuance of shares for stock purchase plans and stock options	686	0	686	0	0
Cancellation of shares for payment of withholding tax	(301)	0	(301)	0	0
Dividends paid	(3,007)	0	(3,007)	0	0
Net income (loss)	(3,754)	0	0	(3,754)	0
Change in cumulative translation adjustment, net	(327)	0	0	0	(327)
BALANCE at end of year at Sep. 30, 2018	79,280	18	134,455	(54,920)	(273)
BALANCE at beginning of year at Jun. 30, 2018	81,085	18	134,367	(53,250)	(50)
Stock-based compensation expense	786	0	786	0	0
Issuance of shares for stock purchase plans and stock options	322	0	322	0	0
Cancellation of shares for payment of withholding tax	(12)	0	(12)	0	0
Dividends paid	(1,008)	0	(1,008)	0	0
Net income (loss)	(1,670)	0	0	(1,670)	0
Change in cumulative translation adjustment, net	(223)	0	0	0	(223)
BALANCE at end of year at Sep. 30, 2018	79,280	18	134,455	(54,920)	(273)
BALANCE at beginning of year at Dec. 31, 2018	69,606	18	133,859	(64,055)	(216)
Stock-based compensation expense	3,246	0	3,246	0	0
Issuance of shares for stock purchase plans and stock options	730	1	729	0	0
Cancellation of shares for payment of withholding tax	(754)	0	(754)	0	0
Dividends paid	(3,046)	0	(3,046)	0	0
Net income (loss)	1,952	0	0	1,952	0
Change in cumulative translation adjustment, net	(256)	0	0	0	(256)
BALANCE at end of year at Sep. 30, 2019	71,478	19	134,034	(62,103)	(472)
BALANCE at beginning of year at Jun. 30, 2019	70,129	18	133,753	(63,431)	(211)
Stock-based compensation expense	918	0	918	0	0
Issuance of shares for stock purchase plans and stock options	392	1	391	0	0
Cancellation of shares for payment of withholding tax	(11)	0	(11)	0	0
Dividends paid	(1,017)	0	(1,017)	0	0
Net income (loss)	1,328	0	0	1,328	0
Change in cumulative translation adjustment, net	(261)	0	0	0	(261)
BALANCE at end of year at Sep. 30, 2019	$ 71,478	$ 19	$ 134,034	$ (62,103)	$ (472)

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Stockholders' Equity (Parenthetical) (unaudited) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Statement Of Stockholders Equity [Abstract]
Cash dividend per share	$ 0.055	$ 0.055	$ 0.155	$ 0.155

Condensed Consolidated Statem_5

Condensed Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Operating Activities:
Net income (loss)	$ 1,952	$ (3,754)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	2,152	2,088
Intangible asset amortization	670	833
Stock-based compensation	3,246	2,572
Loss on disposal of property and equipment	91	11
Restructuring costs	268	(28)
Bad debt provision	(3)	248
Deferred tax provision	0	(868)
Changes in operating assets and liabilities:
Accounts receivable	(1,276)	4,968
Inventories	(838)	(173)
Prepaid expenses and other assets	902	425
Accounts payable	(1,019)	255
Income taxes payable	(40)	(39)
Other accrued liabilities	1,485	(2,395)
Deferred revenue	5	(43)
Net cash provided by operating activities	7,595	4,100
Investing Activities:
Capital expenditures	(1,366)	(2,205)
Proceeds from disposal of property and equipment	0	14
Purchases of short-term investments	(38,393)	(33,978)
Redemptions/maturities of short-term investments	36,844	34,707
Net cash used in investing activities	(2,915)	(1,462)
Financing Activities:
Proceeds from issuance of common stock	730	686
Payment of withholding tax on stock-based compensation	(754)	(301)
Principle payments on finance leases	(79)	(91)
Cash dividends	(3,046)	(3,007)
Net cash used in financing activities	(3,149)	(2,713)
Net increase (decrease) in cash and cash equivalents	1,531	(75)
Effect of exchange rate changes on cash	(213)	(107)
Cash and cash equivalents, beginning of period	4,329	5,559
Cash and Cash Equivalents, End of Period	$ 5,647	$ 5,377

Basis of Presentation

Basis of Presentation	9 Months Ended
	Sep. 30, 2019
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Basis of Presentation	1. Basis of Presentation The accompanying unaudited interim condensed consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”) for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all the information and footnotes required by U.S. GAAP for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included. For further information, refer to the audited consolidated financial statements and footnotes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2018 (the “2018 Form 10-K”). Nature of Operations PCTEL, Inc. (“PCTEL”, the “Company”, “we”, “ours”, and “us”) delivers Performance Critical TELecom technology solutions to the wireless industry. PCTEL is a leading global supplier of wireless network antenna and test solutions. PCTEL designs and manufactures precision antennas and provides test and measurement products that improve the performance of wireless networks globally. PCTEL products address three market segments: Enterprise Wireless, Intelligent Transportation, and Industrial Internet of Things (“IoT”). PCTEL antennas are deployed in small cells, enterprise Wi-Fi access points, fleet management and transit systems, and in network equipment and devices for the Industrial IoT. PCTEL test tools improve the performance of wireless networks globally. Mobile operators, neutral hosts, and network equipment manufacturers rely on PCTEL to analyze, design, and optimize next generation wireless networks. Product Lines Antenna Products PCTEL designs and manufactures precision antennas and offers in-house wireless product development for our customers, including design, testing, radio integration, and manufacturing capabilities. PCTEL antennas are deployed in small cells, enterprise Wi-Fi access points, fleet management and transit systems, and in network equipment and devices for the Industrial IoT. Revenue growth in these markets is driven by the increased use and complexity of wireless communications. Consistent with the Company’s mission to solve complex network engineering problems and in order to compete effectively in the antenna market, PCTEL maintains expertise in the following areas: radio frequency engineering, wireless network engineering, mechanical engineering, mobile antenna design, manufacturing, and product quality and testing. The Company seeks out product applications that command a premium for product design and performance and customer service, and we avoid commodity markets. The Company’s antennas are primarily sold to original equipment manufacturer (“OEM”) providers where they are designed into the customer’s solution. Competition in the antenna markets is fragmented. Competitors include Airgain, Amphenol, Laird, Panorama and Taoglas. Test and Measurement Products PCTEL provides RF test and measurement tools that improve the performance of wireless networks globally, with a focus on LTE, public safety, and emerging 5G technologies. Network operators, neutral hosts, and equipment manufacturers rely on our scanning receivers and testing solutions to analyze, design, and optimize next generation wireless networks. Revenue growth in this market is driven by the implementation and roll out of new wireless technology standards (i.e. 3G to 4G, 4G to 5G). Consistent with our mission to solve complex network engineering problems and in order to compete effectively in the RF test and measurement market, PCTEL maintains expertise in the following areas: radio frequency engineering, digital signal process (“DSP”) engineering, wireless network engineering, mechanical engineering, manufacturing, and product quality and testing. The Company’s test equipment is sold directly to wireless carriers or to OEMs who integrate its products into their solutions which are then sold to wireless carriers. Competitors for the Company’s test tool products include OEMs such as Anritsu, Berkley Varitronics, Digital Receiver Technology, and Rohde and Schwarz. Reorganization and Segment Reporting Effective August 2018, the Company consolidated its organizational structure to drive growth and address the convergence in the Industrial IoT, public safety, and 4G infrastructure markets and the emergence of new technologies such as 5G (the “Reorganization”). The Company’s operations, engineering, business development, sales and marketing, and operational general and administrative functions were consolidated into a single enterprise-wide organization. As a result of the Reorganization that occurred in the third quarter 2018, the Company’s Chief Executive Officer, as the chief operating decision maker (“CODM”) began assessing operating profits and identified assets at the enterprise level for resource allocations. In connection with the Reorganization, the Board of Directors appointed a Chief Operating Officer who maintains regular contact with the CODM to discuss operating activities, financial results, forecasts, and plans for the Company’s businesses. All operating profit and cash flows are measured and managed at the enterprise level. Until the Reorganization, PCTEL operated in two segments for reporting purposes, Connected Solutions and RF Solutions. The CODM assessed operating profits and identified assets for the Connected Solutions and RF Solutions segments for resource allocations. Each segment had its own general manager as well as its own engineering, business development, sales and marketing, and operational general and administrative functions. The Company includes revenues and gross profit for the two major product lines (antenna products and test and measurement products) because each product line has a significantly different gross profit profile. In order to understand the Company’s financial results, it is necessary to understand the impact on gross profit of the revenue mix between them. Basis of Consolidation The unaudited interim condensed consolidated financial statements of the Company include the condensed consolidated balance sheets for the period ended September 30, 2019 and December 31, 2018, and the condensed consolidated statements of operations, statements of comprehensive loss, the condensed consolidated statements of stockholders’ equity and statements of cash flows for the three and nine months ended September 30, 2019 and 2018, respectively. The interim condensed consolidated financial statements are unaudited and reflect all adjustments of a normal recurring nature that are, in the opinion of management, necessary for a fair presentation of the interim period financial statements. The condensed consolidated balance sheet as of December 31, 2018 is derived from the audited financial statements as of December 31, 2018. The unaudited interim condensed consolidated financial statements of the Company have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”). Accordingly, certain information and footnote disclosures normally included in financial statements prepared in accordance with U.S. GAAP have been condensed or omitted. The significant accounting policies followed by the Company are set forth in the 2018 Form 10-K. There were no significant changes in the Company’s significant accounting policies during the nine months ended September 30, 2019. See Note 10 related to Leases for additional disclosures related to the implementation of ASU 2016-02 (“Topic 842”). In addition, the Company reaffirms the use of estimates in the preparation of the financial statements as set forth in the 2018 Form 10-K. These unaudited interim condensed consolidated financial statements should be read in conjunction with the Company’s audited consolidated financial statements and notes thereto included in the 2018 Form 10-K. The results of operations for the period ended September 30, 2019 may not be indicative of the results for the period ending December 31, 2019. Foreign Operations The Company is exposed to foreign currency fluctuations due to its foreign operations and because products are sold internationally. The functional currency for the Company’s foreign operations is predominantly the applicable local currency. Accounts of foreign operations are translated into U.S. dollars using the exchange rate in effect at the applicable balance sheet date for assets and liabilities and average monthly rates prevailing during the period for revenue and expense accounts. Adjustments resulting from translation are included in accumulated other comprehensive loss, a separate component of stockholders’ equity. Gains and losses resulting from other transactions originally in foreign currencies and then translated into U.S. dollars are included in the condensed consolidated statements of operations. Net foreign exchange gains resulting from foreign currency transactions included in other income, net was $198 and $37 for the three months ended September 30, 2019 and 2018, respectively. Net foreign exchange gains resulting from foreign currency transactions included in other income, net was $226 and $28 for the nine months ended September 30, 2019 and 2018, respectively. Recent Accounting Pronouncements In February 2016, the FASB issued Accounting Standards Update (“ASU”) 2016-02, Leases (“Topic 842”), which amends existing guidance to require lessees to recognize assets and liabilities on the balance sheet for the rights and obligations created by long-term leases and to disclose additional quantitative and qualitative information about leasing arrangements. This ASU also provides clarifications surrounding the presentation of the effects of leases in the statement of operations and statement of cash flows. The Company adopted this guidance on January 1, 2019. The Company commenced its assessment of Topic 842 in the second half of 2018 and developed a project plan to guide the implementation. The Company completed this project planin which it analyzed the ASU's impact on its leases, surveyed the Company's key employees, assessed the portfolio of leases, and established a future lease process to keep the lease accounting portfolio up to date. The Company also evaluated the key policy elections and considerations under the standard and completed the internal policy documentation to address the new standard requirements. The Company adopted this new guidance using the updated modified transition method allowed per ASU 2018-11 of Topic 842. Upon adoption on January 1, 2019, total assets and liabilities increased due to the recording of right-of-use assets of $1.5 million and lease liabilities of $1.6 million. See Note 10 for additional information and disclosures required by this new standard. In October 2016, the FASB issued ASU 2016-16, Income Taxes (“Topic 740”): Intra-Entity Transfer of Assets Other than Inventory. Topic 740 requires an entity to recognize the income tax consequences of an intra-entity transfer of an asset other than inventory when the transfer occurs. The Company adopted Topic 740 on January 1, 2018 using the modified retrospective approach, and as a result recorded a deferred tax asset with a corresponding adjustment to retained earnings of $0.1 million associated with an intra-entity transfer of goodwill in 2009. The goodwill was transferred to the U.S. entity from a Canadian entity that was dissolved in 2009. In June 2016, the FASB issued Accounting Standards Update No. 2016-13 (ASU 2016-13) regarding ASC Topic 326, Financial Instruments - Credit Losses, which modifies the measurement of expected credit losses of certain financial instruments. The amendments will be effective for the Company on January 1, 2020. The Company is currently evaluating this guidance and the impact it will have on its consolidated financial statements. In August 2018, the FASB issued ASU 2018-15, Intangibles-Goodwill and Other-Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract The amendments in this update align the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software (and hosting arrangements that include an internal-use software license). The accounting for the service element of a hosting arrangement that is a service contract is not affected by the amendments in this update. This guidance will be effective for the Company on January 1, 2020. The Company is currently evaluating this guidance and the impact it will have on its consolidated financial statements and related disclosures. The Company does not expect the adoption of ASU 2018-15 to have a material impact on its consolidated financial statements.

Fair Value of Financial Instrum

Fair Value of Financial Instruments	9 Months Ended
	Sep. 30, 2019
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	2. Fair Value of Financial Instruments The Company follows accounting guidance for fair value measurements and disclosures, which establishes a fair value hierarchy that requires the Company to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. Fair value is a market-based measurement that should be determined based on assumptions that market participants would use in pricing an asset or liability. As a basis for considering such assumptions, a three-tier fair value hierarchy has been established, which prioritizes the inputs used in measuring fair value as follows: Level 1: inputs are unadjusted quoted prices in active markets for identical assets or liabilities. Level 2: inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices in active markets for similar assets and liabilities, quoted prices for identical or similar assets or liabilities in markets that are not active, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of assets or liabilities. Level 3: unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. Cash equivalents are measured at fair value and investments are recognized at amortized cost in the Company’s financial statements. Accounts receivable and other investments are financial assets with carrying values that approximate fair value due to the short-term nature of these assets. Accounts payable is a financial liability with a carrying value that approximates fair value due to the short-term nature of these liabilities.

Earnings per Share

Earnings per Share	9 Months Ended
	Sep. 30, 2019
Earnings Per Share [Abstract]
Earnings per Share	3. Earnings per Share The following table is the computation of basic and diluted earnings per share: Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 Basic Income (Loss) Per Share computation: Numerator: Net income (loss) $ 1,328 $ (1,670 ) $ 1,952 $ (3,754 ) Denominator: Common shares outstanding 17,922 17,234 17,792 17,145 Net income (loss) per common share - basic Net income (loss) $ 0.07 $ (0.10 ) $ 0.11 $ (0.22 ) Diluted Income (Loss) Per Share computation: Denominator: Common shares outstanding 17,922 17,234 17,792 17,145 Performance related awards 52 * 162 * Restricted shares subject to vesting 206 * 150 * Common stock option grants 1 * 1 * Total shares 18,181 17,234 18,105 17,145 Net income (loss) per common share - diluted Net income (loss) $ 0.07 $ (0.10 ) $ 0.11 $ (0.22 ) * As denoted by “*” in the table above, the weighted average common stock option grants and restricted shares of 274,000 and 566,000 for the three and nine months ended September 30, 2018, respectively, were excluded from the calculations of diluted net loss per share since their effects are anti-dilutive.

Cash, Cash Equivalents and Inve

Cash, Cash Equivalents and Investments	9 Months Ended
	Sep. 30, 2019
Cash And Cash Equivalents [Abstract]
Cash, Cash Equivalents and Investments	4. Cash, Cash Equivalents and Investments The Company’s cash and investments consisted of the following: September 30, December 31, 2019 2018 Cash $ 4,697 $ 1,485 Cash equivalents $ 950 2,844 Short-term investments $ 32,419 30,870 Total $ 38,066 $ 35,199 Cash and Cash Equivalents At September 30, 2019 and December 31, 2018, cash and cash equivalents included bank balances and investments with original maturities less than 90 days. At September 30, 2019 and December 31, 2018, the Company’s cash equivalents were invested in highly liquid AAA rated money market funds that are required to comply with Rule 2a-7 of the Investment Company Act of 1940. Such funds utilize the amortized cost method of accounting, seek to maintain a constant $1.00 per share price, and are redeemable upon demand. The Company restricts its investments in AAA money market funds to those invested 100% in either short-term U.S. government agency securities or bank repurchase agreements collateralized by these same securities. The fair values of these money market funds are established through quoted prices in active markets for identical assets (Level 1 inputs). The Company’s cash in U.S. banks is insured by the Federal Deposit Insurance Corporation up to the insurable limit of $250. The Company had $2.8 million and $0.8 million of cash and cash equivalents in foreign bank accounts at September 30, 2019 and December 31, 2018, respectively. The Company’s cash in its foreign bank accounts is not insured. Within the cash in foreign bank accounts, the Company had cash of $2.8 million and $0.6 million in China bank accounts at September 30, 2019 and December 31, 2018, respectively. As of September 30, 2019, the Company has no intentions of repatriating the cash in its foreign bank accounts in China. If the Company decides to repatriate the cash in the foreign bank accounts, it may have trouble doing so in a timely manner. The Company may also be exposed to foreign currency fluctuations and taxes if it repatriates these funds. The Company completed the closure of its Israeli subsidiary during the fourth quarter of 2018 and repatriated the subsidiary’s remaining cash of $0.2 million during the second quarter of 2019. The foreign currency exchange impact related to the repatriation of these funds did not have a material impact on the financial statements. Investments At September 30, 2019 and December 31, 2018, the Company’s short-term investments consisted of U.S. government agency bonds, A or higher rated corporate bonds, and certificates of deposit. All the investments at September 30, 2019 and December 31, 2018 were classified as held-to-maturity. The bonds have original maturities greater than 90 days and mature in less than one year. The Company’s bond investments are recorded at the purchase price and carried at amortized cost. Cash equivalents and investments were as follows at September 30, 2019 and December 31, 2018: September 30, 2019 December 31, 2018 Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Cash equivalents: Corporate bonds $ 0 $ 504 $ 0 $ 504 $ 0 $ 1,156 $ 0 $ 1,156 Certificates of deposit 0 0 0 $ 0 0 0 0 0 Money market funds 446 0 0 $ 446 1,688 0 0 1,688 Total Cash Equivalents $ 446 $ 504 $ 0 $ 950 $ 1,688 $ 1,156 $ 0 $ 2,844 Investments: Corporate bonds $ 0 $ 27,640 $ 0 $ 27,640 $ 0 $ 21,583 $ 0 $ 21,583 US government agency bonds 0 729 0 $ 729 0 5,671 0 5,671 Certificates of deposit 4,050 0 0 $ 4,050 3,616 0 0 3,616 Total Investments $ 4,050 $ 28,369 $ 0 $ 32,419 $ 3,616 $ 27,254 $ 0 $ 30,870 Cash equivalents and Investments - book value $ 4,496 $ 28,873 $ 0 $ 33,369 $ 5,304 $ 28,410 $ 0 $ 33,714 Cash equivalents and Investments - fair value $ 4,497 $ 28,842 $ 0 $ 33,339 $ 5,304 $ 28,389 $ 0 $ 33,693 The Company categorizes its financial instruments within a fair value hierarchy according to accounting guidance for fair value. The fair value hierarchy is described under the Fair Value of Financial Instruments in Note 2. For the Level 2 investments, the Company uses quoted prices of similar assets in active markets. The fair values in the table above reflect net unrealized losses of $29 and $21 at September 30, 2019 and December 31, 2018, respectively.

Goodwill and Intangible Assets

Goodwill and Intangible Assets	9 Months Ended
	Sep. 30, 2019
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets	5. Goodwill and Intangible Assets Goodwill There were no changes to the goodwill valued at $3.3 million during the three and nine months ended September 30, 2019. There were no triggering events during the quarter ended September 30, 2019. The Company will continue to monitor goodwill for impairment going forward. The goodwill is related to the test and measurement product line, not to the whole Company. The test and measurement product line is a reporting unit because the Company has discrete financial information necessary to perform goodwill impairment testing for this reporting unit under the accounting guidance. The Company evaluates the goodwill based on the cash flows for the test and measurement product line. Intangible Assets The Company amortizes intangible assets with finite lives on a straight-line basis over the estimated useful lives, which range from one to six years. The summary of amortization expense in the consolidated statement of operations is as follows: Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 Cost of revenues $ 167 $ 167 $ 500 $ 500 Operating expenses 48 85 170 333 Total $ 215 $ 252 $ 670 $ 833 The summary of other intangible assets, net is as follows: September 30, 2019 December 31, 2018 Accumulated Net Book Accumulated Net Book Cost Amortization Value Cost Amortization Value Customer contracts and relationships $ 16,880 $ 16,880 $ 0 $ 16,880 $ 16,880 $ 0 Patents and technology 10,114 9,836 278 10,114 9,336 778 Trademarks and trade names 4,834 4,753 81 4,834 4,607 227 Other 2,506 2,506 0 2,506 2,482 24 Total $ 34,334 $ 33,975 $ 359 $ 34,334 $ 33,305 $ 1,029 The $0.7 million decrease in the net book value of intangible assets at September 30, 2019 compared to December 31, 2018 relates to amortization expense for the nine months ended September 30, 2019. The assigned lives and weighted average amortization periods by intangible asset category are summarized below: Intangible Assets Assigned Life Weighted Average Amortization Period Customer contracts and relationships 5 years 5.0 Patents and technology 5 to 6 years 5.1 Trademarks and trade names 5 to 6 years 5.6 Other 1 to 6 years 3.0 The Company’s intangible amortization is scheduled through February 2020. The amortization expense for 2019 and 2020 is as follows: Fiscal Year Amount 2019 $ 885 2020 $ 144

Balance Sheet Information

Balance Sheet Information	9 Months Ended
	Sep. 30, 2019
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Balance Sheet Information	6. Balance Sheet Information Accounts Receivable Accounts receivable are recorded at invoiced amounts with standard net terms that range between 30 and 90 days. The Company extends credit to its customers based on an evaluation of a customer’s financial condition and collateral is generally not required. The Company maintains an allowance for estimated uncollectible accounts receivable. The allowance is based on the Company’s assessment of known delinquent accounts, historical experience, and other currently available evidence of the collectability and the aging of accounts receivable. The Company’s allowance for doubtful accounts was $0.1 million at September 30, 2019 and at December 31, 2018. Inventories Inventories are stated at the lower of cost or market and include material, labor and overhead costs using the first-in, first-out method of costing. Inventories as of September 30, 2019 and December 31, 2018 were composed of raw materials, sub-assemblies, work-in-process and finished goods. The Company had consigned inventory with customers of $0.2 million and $0.9 million at September 30, 2019 and December 31, 2018, respectively. The Company records allowances to reduce the value of inventory to the lower of cost or market, including allowances for excess and obsolete inventory. Reserves for excess inventory are calculated based on our estimate of inventory in excess of normal and planned usage. Obsolete reserves are based on our identification of inventory where the carrying value is above net realizable value. The allowance for inventory losses was $3.4 million and $3.3 million at September 30, 2019 and at December 31, 2018, respectively. Inventories consisted of the following: September 30, 2019 December 31, 2018 Raw materials $ 6,748 $ 7,023 Work-in-process 1,256 1,388 Finished goods 5,573 4,437 Inventories, net $ 13,577 $ 12,848 Prepaid and Other Current Assets Prepaid assets are stated at cost and are amortized over the useful lives (up to one year) of the assets. 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. The Company depreciates computer equipment over three to five years, office equipment, manufacturing and test equipment, and motor vehicles over five years, furniture and fixtures over seven years, and buildings over 30 years. Leasehold improvements are amortized over the shorter of the corresponding lease term or useful life. Depreciation expense and gains and losses on the disposal of property and equipment are included in cost of sales and operating expenses in the condensed consolidated statements of operations. Maintenance and repairs are expensed as incurred. Property and equipment consisted of the following: September 30, 2019 December 31, 2018 Building $ 6,389 $ 6,351 Computers and office equipment 10,677 10,963 Manufacturing and test equipment 14,276 13,573 Furniture and fixtures 1,326 1,318 Leasehold improvements 1,565 1,529 Motor vehicles 20 20 Total property and equipment 34,253 33,754 Less: Accumulated depreciation and amortization (24,914 ) (23,386 ) Land 1,770 1,770 Property and equipment, net $ 11,109 $ 12,138 Depreciation and amortization expense was approximately $0.7 million for the three months ended September 30, 2019 and 2018, respectively. Depreciation and amortization expense was approximately $2.1 million for the nine months ended September 30, 2019 and 2018, respectively. Amortization for finance leases is included in depreciation and amortization expense. See Note 10 for information related to finance leases. Liabilities Accrued liabilities consisted of the following: September 30, 2019 December 31, 2018 Payroll, bonuses, and other employee benefits $ 3,091 $ 1,409 Inventory receipts 1,885 1,396 Paid time off 932 936 Short-term obligations under operating leases 479 0 Professional fees and contractors 435 346 Warranties 400 339 Restructuring 344 33 Deferred revenues 152 149 Income and sales taxes 147 186 Customer refunds for estimated returns 126 154 Real estate taxes 107 148 Short-term obligations under finance leases 80 91 Employee stock purchase plan 0 343 Other 249 271 Total $ 8,427 $ 5,801 Long-term liabilities consisted of the following: September 30, 2019 December 31, 2018 Finance leases $ 182 $ 132 Operating leases 2,552 0 Deferred Rent 0 87 Other 236 162 Total $ 2,970 $ 381

Stock-Based Compensation

Stock-Based Compensation	9 Months Ended
	Sep. 30, 2019
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Stock-Based Compensation	7. Stock-Based Compensation The condensed consolidated statements of operations include $0.9 million and $0.8 million of stock compensation expense for the three months ended September 30, 2019 and 2018, respectively. The condensed consolidated statements of operations include $3.2 million and $2.6 million of stock compensation expense for the nine months ended September 30, 2019 and 2018, respectively. T The stock-based compensation expense by type is as follows: Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 Service-based awards $ 472 $ 730 $ 1,942 $ 2,404 Performance-based awards - short-term incentive plan 361 0 990 0 Performance-based awards - long-term incentive plan 56 0 170 0 Stock option and employee purchase plans 29 56 144 168 Total $ 918 $ 786 $ 3,246 $ 2,572 Total stock-based compensation is reflected in the condensed consolidated statements of operations as follows: Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 Cost of revenues $ 87 $ (49 ) $ 292 $ 131 Research and development 158 165 507 462 Sales and marketing 158 174 521 462 General and administrative 515 496 1,926 1,517 Total $ 918 $ 786 $ 3,246 $ 2,572 Restricted Stock – Service Based The Company grants restricted shares as employee and director incentives. When service-based restricted stock is granted, the Company records deferred stock compensation within additional paid in capital, representing the fair value of the common stock on the date the restricted shares are granted. The Company records stock compensation expense on a straight-line basis over the vesting period of the applicable service-based restricted shares. These grants vest over various periods. During the first quarter 2019, the Company issued 190,159 service-based restricted stock awards to employees that vest in equal annual increments over three years. The following table summarizes service-based restricted stock activity for the nine months ended September 30, 2019: Shares Weighted Average Fair Value Unvested Restricted Stock Awards - December 31, 2018 838,967 $ 6.21 Shares awarded 190,159 5.25 Shares vested (410,013 ) 6.25 Shares cancelled (12,226 ) 6.34 Unvested Restricted Stock Awards - September 30, 2019 606,887 $ 5.88 The intrinsic value of service-based restricted shares that vested during the three months ended September 30, 2019 and 2018 was $32 and $36 respectively. The intrinsic value of service-based restricted shares that vested during the nine months ended September 30, 2019 and 2018 was At September 30, 2019, total unrecognized compensation expense related to restricted stock was approximately $2.0 million to be recognized through 2022 over a weighted average period of 1.3 years. Restricted Stock Units – Service Based The Company grants restricted stock units as employee incentives. Restricted stock units are primarily granted to foreign employees for long-term incentive purposes. Employee restricted stock units are service-based awards and are amortized over the vesting period. At the vesting date, these units are converted to shares of common stock. The Company records expense on a straight-line basis for restricted stock units. The following table summarizes the restricted stock unit activity during the nine months ended September 30, 2019: Shares Weighted Average Fair Value Unvested Restricted Stock Units - December 31, 2018 18,638 $ 5.66 Units awarded 2,700 5.27 Units vested/Shares awarded (5,721 ) 5.67 Unvested Restricted Stock Units - September 30, 2019 15,617 $ 5.48 The intrinsic value of service-based restricted stock units that vested and were issued as shares during the nine months ended September 30, 2019 and 2018 was $30 and $29, respectively. No service-based restricted stock units vested during the three months ended September 30, 2019 or 2018. As of September 30, 2019, the unrecognized compensation expense related to the unvested portion of the Company’s restricted stock units was approximately $30 , to be recognized through 2022 over a weighted average period of 1.2 years. Stock Options The Company grants stock options to purchase common stock primarily to certain new employees. The exercise price of the stock options is no less than the fair value of the Company’s stock on the grant date. Outstanding stock options have either a seven-year or ten-year life and generally vest over a period of four years, 25% after one year, and ratably on a monthly basis thereafter. Stock options may be exercised at any time prior to their expiration date or within 180 days of termination of employment, or such shorter time as may be provided in the related stock option agreement. A summary of the Company’s stock option activity for the nine months ended September 30, 2019 is as follows: Options Outstanding Weighted Average Exercise Price Outstanding at December 31, 2018 423,534 $ 7.15 Options exercised (500 ) 7.22 Options cancelled/expired (114,929 ) 7.16 Outstanding at September 30, 2019 308,105 $ 7.14 Exercisable at September 30, 2019 304,703 $ 7.16 The range of exercise prices for options outstanding and exercisable at September 30, 2019, was $5.00 to $8.32. The following table summarizes information about stock options outstanding under all stock option plans: Options Outstanding Options Exercisable Range of Exercise Prices Number Outstanding Weighted Average Contractual Life (Years) Weighted- Average Exercise Price Number Exercisable Weighted Average Exercise Price $ 5.00 - $ 7.15 17,459 2.70 $ 6.02 14,057 $ 6.08 $ 7.16 185,041 0.53 7.16 185,041 7.16 $ 7.22 93,105 0.51 7.22 93,105 7.22 $ 7.23 - $ 8.32 12,500 1.52 7.86 12,500 7.86 $ 5.00 - $ 8.32 308,105 0.68 $ 7.14 304,703 $ 7.16 The weighted average contractual life and intrinsic value of options outstanding and options exercisable at September 30, 2019, was the following: Weighted Average Contractual Life (years) Intrinsic Value Options Outstanding 0.68 $ 388 Options Exercisable 0.64 $ 379 The intrinsic value is based on the share price of $8.40 at September 30, 2019. There were no stock options granted during the nine months ended September 30, 2019. For outstanding stock options, the Company calculated the fair value of each option grant on the date of grant using the Black-Scholes option-pricing model. Because the Company’s employee stock options have characteristics significantly different from those of traded options, and because changes in the subjective input assumptions can materially affect the fair value estimate, the existing models may not necessarily provide a reliable single measure of the fair value of the employee stock options. In addition, option valuation models require the input of highly subjective assumptions including the expected stock price volatility and expected option life. The dividend yield rate is calculated by dividing the Company’s annual dividend by the closing price on the grant date. The risk-free interest rate is based on the U.S. Treasury yields with a remaining term that approximates the expected life of the options granted. The expected volatility is based on a five-year historical period of the Company’s stock price. The expected life for options granted is based on historical data of employee exercise performance. The Company records expense based on the graded vesting method. As of September 30, 2019, the unrecognized compensation expense related to the unvested portion of the Company’s stock options was approximately $2, to be recognized through 2021 over a weighted average period of 1.1 years. Performance-Based Equity Awards In February 2019, the Company’s Board of Directors approved the 2019 Long-Term Incentive Plan (“2019 LTIP”). Under the 2019 LTIP, shares of the Company’s stock can be earned by certain executives and key managers based on achievement of a three-year revenue growth target with a penalty if a certain adjusted EBITDA level is not maintained. At target, the aggregate number of shares that can be earned is 171,437. If the Company achieves less than the target growth over the performance period, the participant will receive fewer shares than the target award, determined on a straight-line basis. If the Company, achieves greater than the target growth, the participant will receive more shares than the target award on an accelerated basis. The maximum number of aggregate shares that may be issued under the 2019 LTIP is 300,015 as of September 30, 2019. During the three and nine months ended September 30, 2019, the shares that can be earned at target and the maximum shares that can be earned declined by 2,680 and 4,690, respectively due to employee terminations. The performance period for the 2019 LTIP is from January 1, 2019 through December 31, 2021 and the participants are required to be in service at the determination date of the award following the end of the performance period in order to receive the award. Shares earned under the 2019 LTIP will be fully vested shares. Stock compensation expense is amortized over the performance period for these awards based on estimated achievement of the goal. At target, the total fair market value of the award was $0.9 million based on the share price of $5.27 on the grant date. Short-Term Incentive Plan In February 2019, the Board of Directors approved the 2019 short-term incentive plan (“2019 STIP”) based on two components of the Company’s performance: (1) revenues weighted 20% and (2) Adjusted EBITDA weighted 80%. “Adjusted EBITDA” is defined as GAAP operating profit excluding stock compensation expenses, amortization of intangible assets, depreciation, restructuring charges, impairment charges, gain/loss on sale of product lines, and expenses included in GAAP operating profit to the extent recovery of such expenses is recorded in other income. The goals are consistent for all employees who participate in the 2019 STIP. Incentive awards earned by certain executives and key managers under the Company’s 2019 STIP will be settled 50% in cash and 50% in shares of the Company’s stock. The incentive awards for all other participants under the 2019 STIP will be 100% in cash. The Company records stock compensation expense based on the estimated payouts under the STIP. No incentive awards were settled for the 2018 short-term incentive plan because the Company did not meet the performance objectives. Employee Stock Purchase Plan (“ESPP”) The ESPP enables eligible employees to purchase common stock at the lower of 85% of the fair market value of the common stock on the first or last day of each offering period. Each offering period is approximately six months. The Company received proceeds of $0.3 million from the issuance of 95,376 shares under the ESPP in February 2019 and received proceeds of $0.4 million from the issuance of 68,212 shares under the ESPP in February 2018. The Company received proceeds of $0.4 million from the issuance of 85,483 shares under the ESPP in August 2019 and received proceeds of $0.3 million from the issuance of 88,583 shares under the ESPP in August 2018. 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 calculated the fair value of each employee stock purchase grant on the date of grant using the Black-Scholes option-pricing model using the following assumptions: Employee Stock Purchase Plan 2019 2018 Dividend yield 4.1 % 3.2 % Risk-free interest rate 2.5 % 2.1 % Expected volatility 34 % 33 % Expected life (in years) 0.5 0.5 The dividend yield rate was calculated by dividing the Company’s annual dividend by the closing price on the grant date. The risk-free interest rate was based on the U.S. Treasury yields with a remaining term that approximates the expected life of the options granted. The volatility was based on a five-year historical period of the Company’s stock price. The expected life was based on the offering period. Board of Director Equity Awards The Company grants equity awards under the PCTEL, Inc. Stock Plan (the “Stock Plan”) to members of its Board of Directors as an annual retainer and for committee service. These awards are shares of the Company’s stock that vest upon issuance. New directors receive a one-time grant that vests over three years. In June 2019, the Company issued 79,918 shares of the Company’s stock with a fair value of $0.4 million for the director’s annual retainer and for committee service. In June 2018, the Company issued 60,988 shares of the Company’s stock with a fair value of $0.4 million for the directors’ annual retainer and for committee service. Employee Withholding Taxes on Stock Awards For ease in administering the issuance of stock awards, the Company holds back shares of vested restricted stock awards and short-term incentive plan stock awards for the value of the statutory withholding taxes. For each individual receiving a share award, the Company redeems the shares it computes as the value for the withholding tax and remits this amount to the appropriate tax authority. For withholding taxes related to stock awards, the Company paid $0.8 million and $0.3 million during the nine months ended September 30, 2019 and 2018, respectively.

Benefit Plans

Benefit Plans	9 Months Ended
	Sep. 30, 2019
Compensation And Retirement Disclosure [Abstract]
Benefit Plans	8. Benefit Plans Employee Benefit Plans The Company’s 401(k) plan covers all U.S. employees beginning the first day of the month following the first month of their employment. Under this plan, employees may elect to contribute up to 15% of their current compensation to the 401(k) plan up to the statutorily prescribed annual limit. The Company matches employee contributions up to 4% and may also make discretionary contributions to the 401(k) plan. The Company also contributes to various retirement plans for foreign employees. The Company’s contributions to retirement plans were as follows: Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 PCTEL, Inc. 401(k) profit sharing plan - US employees $ 165 $ 158 $ 484 $ 523 Defined contribution plans - foreign employees 111 137 356 400 Total $ 276 $ 295 $ 840 $ 923

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2019
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	9. Commitments and Contingencies China Restructuring On August 7, 2019 the Board of Directors approved a transition plan for the Company’s China manufacturing operations. In order to optimize the cost structure of the antenna product line and increase the Company’s competitiveness, it will transition high-volume manufacturing from its Tianjin, China facility to contract manufacturers in China and elsewhere. The Company expects the transition to be substantially completed by the end of our 2020 fiscal year (the “Transition Period”) and it expects to recognize cumulative pre-tax charges of approximately $1.0 million consisting of severance and other transition costs. The Company expects to eliminate approximately 140 positions, or approximately 35% of the Company’s full-time global workforce over the course of the Transition Period. Approximately $0.9 million of severance costs will be paid in cash. Other non-cash costs associated with the transition to contract manufacturers include fixed asset dispositions estimated to be $0.1 million. During the three months ended September 30, 2019, the Company incurred restructuring expenses of $0.3 million for employee severance and payroll related costs for 49 manufacturing employees. The severance payments and related payroll costs for these employees were paid in October 2019. Recognition of the remaining restructuring expense will occur as the employees are notified of their termination. Colorado Restructuring During the first quarter 2016, the Company exited from its Colorado office in order to consolidate facility space and recorded restructuring expense for the remaining obligations under the lease, net of proceeds for a sublease. The Company signed a sublease for the office space in the second quarter 2017. The obligation for the Colorado lease was retained by the Company. The Company recorded $0.3 million of restructuring expense for the three and nine months ended September 30, 2019 and $0 for the three and nine months ended September 30, 2018. The following table summarizes the restructuring activity during the nine months ended September 30, 2019 and the status of the reserves at September 30, 2019: China Colorado Restructuring Restructuring Total Balance at December 31, 2018 $ 0 $ 77 $ 77 Restructuring expense 295 0 $ 295 Foreign currency adjustment (1 ) 0 $ (1 ) Payments made 0 (105 ) $ (105 ) Payments received 0 79 $ 79 Balance at September 30, 2019 $ 294 $ 51 $ 345 The restructuring liability is recorded on the balance sheet at September 30, 2019 and December 31, 2018 as follows: September 30, 2019 December 31, 2018 Accrued liabilities $ 344 $ 33 Long-term liabilities 1 44 Total $ 345 $ 77 Warranty Reserve and Sales Returns The Company allows its major distributors and certain other customers to return unused product under specified terms and conditions. The Company accrues for product returns based on historical sales and return trends. The refund liability related to estimated sales returns was $0.1 million at September 30, 2019 and $0.2 million at December 31, 2018, respectively, and is included within accrued liabilities on the accompanying condensed consolidated balance sheets. The Company offers repair and replacement warranties of up to five years for certain antenna products and scanning receiver products. The Company’s warranty reserve is based on historical sales and costs of repair and replacement trends. The warranty reserve was $0.4 million at September 30, 2019 and 2018, respectively, and is included in accrued liabilities in the accompanying condensed consolidated balance sheets. The following table summarizes the warranty activity during the nine months ended September 30, 2019 and 2018: Nine Months Ended September 30, 2019 2018 Beginning balance $ 339 $ 382 Provisions for warranties 207 65 Consumption of reserves (146 ) (46 ) Ending balance $ 400 $ 401

Leases

Leases	9 Months Ended
	Sep. 30, 2019
Leases [Abstract]
Leases	10. Leases The Company adopted Topic 842 as of January 1, 2019, using the transition method per ASU No. 2018-11, wherein entities are allowed to apply the new leases standard at the adoption date. Accordingly, all periods prior to January 1, 2019 were presented in accordance with the previous ASC Topic 840 (“Topic 840”), Leases, and no retrospective adjustments were made to the comparative periods presented. Adoption of Topic 842 resulted in an increase to total assets of $1.5 million and to liabilities of $1.6 million due to the recording of operating lease right-of-use assets ("ROU") and operating lease liabilities. Finance leases were not impacted by the adoption of Topic 842, as finance lease liabilities and the corresponding ROU assets were already recorded in the balance sheet under the previous guidance, Topic 840. The adoption did not materially impact the Company’s consolidated statements of operations or cash flows. The Company has operating leases for facilities and finance leases for office equipment. Leases with an initial term of 12 months or less are not recorded in the balance sheet. The Company has elected the practical expedient to account for each separate lease component of a contract and its associated non-lease components as a single lease component, thus causing all fixed payments to be capitalized. The Company also elected the package of practical expedients permitted within the new standard, which among other things, allows the Company to carry forward historical lease classifications. The Company determines if an arrangement is a lease at inception of a contract. ROU assets represent the Company's right to use an underlying asset during the lease term and lease liabilities represent the Company's obligation to make lease payments arising from the lease. ROU assets and liabilities are recognized at the lease commencement date based on the net present value of fixed lease payments over the lease term. The Company's lease term is deemed to include options to extend or terminate the lease when it is reasonably certain that it will exercise that option. ROU assets also include any advance lease payments made and exclude lease incentives. As most of the Company's operating leases do not provide an implicit rate, the Company uses its incremental borrowing rate based on the information available at commencement date in determining the present value of lease payments on a collateralized basis. Finance lease agreements generally include an interest rate that is used to determine the present value of future lease payments. Operating fixed lease expense and finance lease depreciation expense are recognized on a straight-line basis over the lease term. The Company's lease cost for the nine months ended September 30, 2019 included the following components: Three Months ended September 30, 2019 Nine Months ended September 30, 2019 Operating lease costs $ 238 $ 673 Short-term lease costs 20 71 Amortization of finance lease assets 27 78 Interest on finance lease liabilities 2 6 Total lease cost $ 287 $ 828 The table below summarizes the Company's scheduled future minimum lease payments under operating and finance leases recorded on the balance sheet as of September 30, 2019: Year Operating Leases Finance Leases 2019 $ 228 $ 23 2020 305 86 2021 472 73 2022 558 48 2023 569 32 Thereafter 3,756 20 Total minimum payments required 5,888 282 Less: present value of tenant allowance 1,448 0 Less: amount representing interest 1,409 20 Present value of net minimum lease payments 3,031 262 Less: current maturities of lease obligations (479 ) (80 ) Long-term lease obligations $ 2,552 $ 182 The weighted average remaining lease terms and discount rates for all the Company’s operating and finance leases were as follows as of September 30, 2019: September 30, 2019 Weighted-average remaining lease term - finance leases 3.77 years Weighted-average remaining lease term - operating leases 9.01 years Weighted-average discount rate - finance leases 4% Weighted-average discount rate - operating leases 5% The table below presents supplemental cash flow information related to leases during the nine months ended September 30, 2019: September 30, 2019 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows for operating leases $ 684 Operating cash flows for finance leases $ 6 Financing cash flows for finance leases $ 79 The following table summarizes the classification of ROU assets and lease liabilities as of September 30, 2019: Leases Consolidated Balance Sheet Classification September 30, 2019 Assets: Operating right-of-use assets Other noncurrent assets $ 2,931 Finance right-of-use assets Other noncurrent assets 254 Total leased assets $ 3,185 Liabilities: Current Operating lease liabilities Accrued liabilities $ 479 Finance lease liabilities Accrued liabilities 80 Noncurrent Operating lease liabilities Long-term liabilities 2,552 Finance lease liabilities Long-term liabilities 182 Total lease liabilities $ 3,293 In January 2019, the Company entered into an eleven-year lease ending February 28, 2031 for 21,030 square feet of office space in Clarksburg, Maryland for the Company’s test and measurement product line. The Company will move the operations for its test and measurement product line from its Germantown, Maryland office to the new office in the first quarter 2020. The Company recognized a present value right of use asset of $2.1 million in August 2019, which was the lease commencement date for accounting purposes. The present value of the right of use asset reflects 14 months of rent abatement and up to $1.5 million in tenant improvement incentives in the form of cash reimbursements which the Company is expected to fully utilize. In accordance with the disclosure requirements for our adoption of Topic 842, the Company is presenting the operating lease commitments table under Topic 840 as of December 31, 2018. The following table is unchanged from the disclosure in Note 7 in the 2018 Form 10-K: Year Amount 2019 $ 1,176 2020 518 2021 145 2022 146 2023 131 Thereafter 137 Future minimum lease payments $ 2,253

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2019
Income Tax Disclosure [Abstract]
Income Taxes	11. Income Taxes The Company recorded income tax expense of $6 and $23 for the three and nine months ended September 30, 2019, respectively. The Company recorded an income tax benefit of $0.5 million and $1.0 million for the three and nine months ended September 30, 2018, respectively. The expense recorded for the three and nine months ended September 30, 2019 was lower than the statutory rate of 21% because the Company has a full valuation allowance on its deferred tax assets related to federal, foreign, and state jurisdictions. The income tax benefit recorded for the three and nine months ended September 30, 2018 was higher than the statutory rate of 21% due to permanent differences and estimated research credits. The Company’s gross deferred tax assets consist of federal and state net operating losses (“NOLs”), credits, and timing differences and are virtually all related to United States jurisdictions. The Company’s federal NOLs generated in 2019 and 2018 have an infinite life, and the Company’s NOLs and credits generated as of December 31, 2017 have a finite life primarily based on the 20-year carry forward of federal net operating losses. The timing differences have a ratable reversal pattern over 12 years. The analysis that the Company prepared to determine the valuation allowance required significant judgment and assumptions regarding future market conditions as well as forecasts for profits, taxable income, and taxable income by jurisdiction. Due to the sensitivity of the analysis, changes to the assumptions in subsequent periods could have a material effect on the valuation allowance. The Company’s gross unrecognized tax benefit was $0.7 million at September 30, 2019 and at December 31, 2018. The Company files a consolidated federal income tax return, income tax returns with various states, and foreign income tax returns in various foreign jurisdictions. The Company’s U.S. federal tax returns remain subject to examination for 2015 and subsequent periods. The Company’s U.S. state tax returns remain subject to examination for 2012 and subsequent periods. The Company’s foreign tax returns remain subject to examination for 2010 and subsequent periods.

Product Line, Customer and Geog

Product Line, Customer and Geographic Information	9 Months Ended
	Sep. 30, 2019
Segment Reporting [Abstract]
Product Line, Customer and Geographic Information	12. Product Line, Customer and Geographic Information The following tables are the product line revenues and gross profits for the three and nine months ended September 30, 2019 and 2018. Three Months Ended September 30, 2019 Antenna Products Test & Measurement Corporate Total Revenues $ 16,463 $ 7,240 $ (73 ) $ 23,630 Gross Profit $ 5,712 $ 4,937 $ (2 ) $ 10,647 Gross Profit % 34.7 % 68.2 % NA 45.1 % Nine Months Ended September 30, 2019 Antenna Products Test & Measurement Corporate Total Revenues $ 47,565 $ 20,301 $ (146 ) $ 67,720 Gross Profit $ 16,142 $ 13,834 $ 24 $ 30,000 Gross Profit % 33.9 % 68.1 % NA 44.3 % Three Months Ended September 30, 2018 Antenna Products Test & Measurement Corporate Total Revenues $ 14,877 $ 3,556 $ (7 ) $ 18,426 Gross Profit $ 4,504 $ 2,201 $ 16 $ 6,721 Gross Profit % 30.3 % 61.9 % NA 36.5 % Nine Months Ended September 30, 2018 Antenna Products Test & Measurement Corporate Total Revenues $ 50,120 $ 11,691 $ (72 ) $ 61,739 Gross Profit $ 14,734 $ 7,627 $ 23 $ 22,384 Gross Profit % 29.4 % 65.2 % NA 36.3 % The Company’s revenue from customers by geographic location, as a percent of total revenues, is as follows: Three Months Ended September 30, Nine Months Ended September 30, Region 2019 2018 2019 2018 Europe, Middle East, & Africa 12% 13% 13% 11% Asia Pacific 6% 17% 9% 17% Other Americas 4% 5% 3% 4% Total Foreign sales 22% 35% 25% 32% There were no customers that accounted for 10% or more of revenues during the three and nine months ended September 30, 2019 and 2018. The following table represents the customers that accounted for 10% or more of total trade accounts receivable at September 30, 2019 and December 31, 2018. Trade Accounts Receivable September 30, 2019 December 31, 2018 Customer A 16% 9% Customer B 15% 13% Customer C 12% 1%

Revenue from Contracts with Cus

Revenue from Contracts with Customers	9 Months Ended
	Sep. 30, 2019
Revenue From Contract With Customer [Abstract]
Revenue from Contracts with Customers	13. Revenue from Contracts with Customers Under Topic 606, a contract with a customer is an agreement which both parties have approved, that creates enforceable rights and obligations, has commercial substance, and specified payment terms, and for which collectability is probable. Once the Company has entered into a contract, it is evaluated to identify performance obligations. For each performance obligation, revenue is recognized as control of promised goods or services transfers to the customer in an amount that reflects the consideration the Company expects to receive in exchange for those goods or services. The amount of revenue recognized takes into account variable consideration, such as returns and volume rebates. A majority of the Company’s revenue is short cycle in nature with shipments within one year from order. The Company's payment terms generally range between 30 to 90 days. 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 is recognized “over time”. For the sale of antenna products and test and measurement products, the Company satisfies its performance obligations generally at the time of shipment or upon delivery based on the contractual terms with its customers. For products shipped on consignment, the Company recognizes revenue upon delivery from the consignment location. For its test and measurement software tools, the Company has a performance obligation to provide software maintenance and support for one year. The Company recognizes revenues for the maintenance and support over this period. The Company considers shipping and handling performed by the Company as fulfillment activities. Amounts billed for shipping and handling are included in revenues, while costs incurred for shipping and handling are included in cost of revenues. The Company excludes taxes from the transaction price. Cost of contracts include sales commissions. The Company expenses the cost of contracts when incurred because the amortization period is one year or less. The Company allows its major distributors and certain other customers to return unused product under specified terms and conditions. The Company estimates product returns based on historical sales and return trends and records a corresponding refund liability. The refund liability was $0.1 million and $0.2 million at September 30, 2019 and December 31, 2018, respectively, and is included within accrued liabilities in the accompanying condensed consolidated balance sheets. The Company records an asset based on historical experience for the amount of product it expects to return to inventory as a result of customer returns, which is recorded in inventories in the accompanying condensed consolidated balance sheets. The product return asset was $0.1 million at September 30, 2019 and December 31, 2018. There were no contract assets at September 30, 2019 or December 31, 2018. The Company records contract liabilities for deferred revenue and customer prepayments. Contract liabilities are recorded in accrued liabilities in the accompanying condensed consolidated balance sheets. The contract liability was $0.3 million and $0.2 million at September 30, 2019 and December 31, 2018, respectively. The Company recognized revenue of $0.1 million during the nine months ended September 30, 2019 and September 30, 2018, respectively, related to contract liabilities at the beginning of the period.

Subsequent Events

Subsequent Events	9 Months Ended
	Sep. 30, 2019
Subsequent Events [Abstract]
Subsequent Events	14. Subsequent Events The Company evaluates subsequent events occurring between the most recent balance sheet date and the date that the financial statements are available to be issued in order to determine whether the subsequent events are to be recorded and/or disclosed in the Company’s financial statements and footnotes. The financial statements are considered to be available to be issued at the time that they are filed with the SEC. Other than the event described below, there were no subsequent events or transactions that required recognition or disclosure in the unaudited interim condensed consolidated financial statements. On November 6, 2019 the Board of Directors approved a share repurchase program pursuant to which the Company may repurchase up to $7.0 million of its common stock, effective immediately through the end of 2020. Such purchases may be made from time to time at prevailing prices in the open market, by block purchases, in private transactions or otherwise. The repurchases will be funded with cash on hand.

Basis of Presentation (Policies

Basis of Presentation (Policies)	9 Months Ended
	Sep. 30, 2019
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Nature of Operations	Nature of Operations PCTEL, Inc. (“PCTEL”, the “Company”, “we”, “ours”, and “us”) delivers Performance Critical TELecom technology solutions to the wireless industry. PCTEL is a leading global supplier of wireless network antenna and test solutions. PCTEL designs and manufactures precision antennas and provides test and measurement products that improve the performance of wireless networks globally. PCTEL products address three market segments: Enterprise Wireless, Intelligent Transportation, and Industrial Internet of Things (“IoT”). PCTEL antennas are deployed in small cells, enterprise Wi-Fi access points, fleet management and transit systems, and in network equipment and devices for the Industrial IoT. PCTEL test tools improve the performance of wireless networks globally. Mobile operators, neutral hosts, and network equipment manufacturers rely on PCTEL to analyze, design, and optimize next generation wireless networks.
Segment Reporting	Product Lines Antenna Products PCTEL designs and manufactures precision antennas and offers in-house wireless product development for our customers, including design, testing, radio integration, and manufacturing capabilities. PCTEL antennas are deployed in small cells, enterprise Wi-Fi access points, fleet management and transit systems, and in network equipment and devices for the Industrial IoT. Revenue growth in these markets is driven by the increased use and complexity of wireless communications. Consistent with the Company’s mission to solve complex network engineering problems and in order to compete effectively in the antenna market, PCTEL maintains expertise in the following areas: radio frequency engineering, wireless network engineering, mechanical engineering, mobile antenna design, manufacturing, and product quality and testing. The Company seeks out product applications that command a premium for product design and performance and customer service, and we avoid commodity markets. The Company’s antennas are primarily sold to original equipment manufacturer (“OEM”) providers where they are designed into the customer’s solution. Competition in the antenna markets is fragmented. Competitors include Airgain, Amphenol, Laird, Panorama and Taoglas. Test and Measurement Products PCTEL provides RF test and measurement tools that improve the performance of wireless networks globally, with a focus on LTE, public safety, and emerging 5G technologies. Network operators, neutral hosts, and equipment manufacturers rely on our scanning receivers and testing solutions to analyze, design, and optimize next generation wireless networks. Revenue growth in this market is driven by the implementation and roll out of new wireless technology standards (i.e. 3G to 4G, 4G to 5G). Consistent with our mission to solve complex network engineering problems and in order to compete effectively in the RF test and measurement market, PCTEL maintains expertise in the following areas: radio frequency engineering, digital signal process (“DSP”) engineering, wireless network engineering, mechanical engineering, manufacturing, and product quality and testing. The Company’s test equipment is sold directly to wireless carriers or to OEMs who integrate its products into their solutions which are then sold to wireless carriers. Competitors for the Company’s test tool products include OEMs such as Anritsu, Berkley Varitronics, Digital Receiver Technology, and Rohde and Schwarz. Reorganization and Segment Reporting Effective August 2018, the Company consolidated its organizational structure to drive growth and address the convergence in the Industrial IoT, public safety, and 4G infrastructure markets and the emergence of new technologies such as 5G (the “Reorganization”). The Company’s operations, engineering, business development, sales and marketing, and operational general and administrative functions were consolidated into a single enterprise-wide organization. As a result of the Reorganization that occurred in the third quarter 2018, the Company’s Chief Executive Officer, as the chief operating decision maker (“CODM”) began assessing operating profits and identified assets at the enterprise level for resource allocations. In connection with the Reorganization, the Board of Directors appointed a Chief Operating Officer who maintains regular contact with the CODM to discuss operating activities, financial results, forecasts, and plans for the Company’s businesses. All operating profit and cash flows are measured and managed at the enterprise level. Until the Reorganization, PCTEL operated in two segments for reporting purposes, Connected Solutions and RF Solutions. The CODM assessed operating profits and identified assets for the Connected Solutions and RF Solutions segments for resource allocations. Each segment had its own general manager as well as its own engineering, business development, sales and marketing, and operational general and administrative functions. The Company includes revenues and gross profit for the two major product lines (antenna products and test and measurement products) because each product line has a significantly different gross profit profile. In order to understand the Company’s financial results, it is necessary to understand the impact on gross profit of the revenue mix between them.
Basis of Consolidation	Basis of Consolidation The unaudited interim condensed consolidated financial statements of the Company include the condensed consolidated balance sheets for the period ended September 30, 2019 and December 31, 2018, and the condensed consolidated statements of operations, statements of comprehensive loss, the condensed consolidated statements of stockholders’ equity and statements of cash flows for the three and nine months ended September 30, 2019 and 2018, respectively. The interim condensed consolidated financial statements are unaudited and reflect all adjustments of a normal recurring nature that are, in the opinion of management, necessary for a fair presentation of the interim period financial statements. The condensed consolidated balance sheet as of December 31, 2018 is derived from the audited financial statements as of December 31, 2018. The unaudited interim condensed consolidated financial statements of the Company have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”). Accordingly, certain information and footnote disclosures normally included in financial statements prepared in accordance with U.S. GAAP have been condensed or omitted. The significant accounting policies followed by the Company are set forth in the 2018 Form 10-K. There were no significant changes in the Company’s significant accounting policies during the nine months ended September 30, 2019. See Note 10 related to Leases for additional disclosures related to the implementation of ASU 2016-02 (“Topic 842”). In addition, the Company reaffirms the use of estimates in the preparation of the financial statements as set forth in the 2018 Form 10-K. These unaudited interim condensed consolidated financial statements should be read in conjunction with the Company’s audited consolidated financial statements and notes thereto included in the 2018 Form 10-K. The results of operations for the period ended September 30, 2019 may not be indicative of the results for the period ending December 31, 2019.
Foreign Operations	Foreign Operations The Company is exposed to foreign currency fluctuations due to its foreign operations and because products are sold internationally. The functional currency for the Company’s foreign operations is predominantly the applicable local currency. Accounts of foreign operations are translated into U.S. dollars using the exchange rate in effect at the applicable balance sheet date for assets and liabilities and average monthly rates prevailing during the period for revenue and expense accounts. Adjustments resulting from translation are included in accumulated other comprehensive loss, a separate component of stockholders’ equity. Gains and losses resulting from other transactions originally in foreign currencies and then translated into U.S. dollars are included in the condensed consolidated statements of operations. Net foreign exchange gains resulting from foreign currency transactions included in other income, net was $198 and $37 for the three months ended September 30, 2019 and 2018, respectively. Net foreign exchange gains resulting from foreign currency transactions included in other income, net was $226 and $28 for the nine months ended September 30, 2019 and 2018, respectively.
Recent Accounting Pronouncements	Recent Accounting Pronouncements In February 2016, the FASB issued Accounting Standards Update (“ASU”) 2016-02, Leases (“Topic 842”), which amends existing guidance to require lessees to recognize assets and liabilities on the balance sheet for the rights and obligations created by long-term leases and to disclose additional quantitative and qualitative information about leasing arrangements. This ASU also provides clarifications surrounding the presentation of the effects of leases in the statement of operations and statement of cash flows. The Company adopted this guidance on January 1, 2019. The Company commenced its assessment of Topic 842 in the second half of 2018 and developed a project plan to guide the implementation. The Company completed this project planin which it analyzed the ASU's impact on its leases, surveyed the Company's key employees, assessed the portfolio of leases, and established a future lease process to keep the lease accounting portfolio up to date. The Company also evaluated the key policy elections and considerations under the standard and completed the internal policy documentation to address the new standard requirements. The Company adopted this new guidance using the updated modified transition method allowed per ASU 2018-11 of Topic 842. Upon adoption on January 1, 2019, total assets and liabilities increased due to the recording of right-of-use assets of $1.5 million and lease liabilities of $1.6 million. See Note 10 for additional information and disclosures required by this new standard. In October 2016, the FASB issued ASU 2016-16, Income Taxes (“Topic 740”): Intra-Entity Transfer of Assets Other than Inventory. Topic 740 requires an entity to recognize the income tax consequences of an intra-entity transfer of an asset other than inventory when the transfer occurs. The Company adopted Topic 740 on January 1, 2018 using the modified retrospective approach, and as a result recorded a deferred tax asset with a corresponding adjustment to retained earnings of $0.1 million associated with an intra-entity transfer of goodwill in 2009. The goodwill was transferred to the U.S. entity from a Canadian entity that was dissolved in 2009. In June 2016, the FASB issued Accounting Standards Update No. 2016-13 (ASU 2016-13) regarding ASC Topic 326, Financial Instruments - Credit Losses, which modifies the measurement of expected credit losses of certain financial instruments. The amendments will be effective for the Company on January 1, 2020. The Company is currently evaluating this guidance and the impact it will have on its consolidated financial statements. In August 2018, the FASB issued ASU 2018-15, Intangibles-Goodwill and Other-Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract The amendments in this update align the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software (and hosting arrangements that include an internal-use software license). The accounting for the service element of a hosting arrangement that is a service contract is not affected by the amendments in this update. This guidance will be effective for the Company on January 1, 2020. The Company is currently evaluating this guidance and the impact it will have on its consolidated financial statements and related disclosures. The Company does not expect the adoption of ASU 2018-15 to have a material impact on its consolidated financial statements.

Earnings per Share (Tables)

Earnings per Share (Tables)	9 Months Ended
	Sep. 30, 2019
Earnings Per Share [Abstract]
Computation of Basic and Diluted Earnings Per Share	The following table is the computation of basic and diluted earnings per share: Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 Basic Income (Loss) Per Share computation: Numerator: Net income (loss) $ 1,328 $ (1,670 ) $ 1,952 $ (3,754 ) Denominator: Common shares outstanding 17,922 17,234 17,792 17,145 Net income (loss) per common share - basic Net income (loss) $ 0.07 $ (0.10 ) $ 0.11 $ (0.22 ) Diluted Income (Loss) Per Share computation: Denominator: Common shares outstanding 17,922 17,234 17,792 17,145 Performance related awards 52 * 162 * Restricted shares subject to vesting 206 * 150 * Common stock option grants 1 * 1 * Total shares 18,181 17,234 18,105 17,145 Net income (loss) per common share - diluted Net income (loss) $ 0.07 $ (0.10 ) $ 0.11 $ (0.22 ) * As denoted by “*” in the table above, the weighted average common stock option grants and restricted shares of 274,000 and 566,000 for the three and nine months ended September 30, 2018, respectively, were excluded from the calculations of diluted net loss per share since their effects are anti-dilutive.

Cash, Cash Equivalents and In_2

Cash, Cash Equivalents and Investments (Tables)	9 Months Ended
	Sep. 30, 2019
Cash And Cash Equivalents [Abstract]
Cash and Cash Equivalents and Investments	The Company’s cash and investments consisted of the following: September 30, December 31, 2019 2018 Cash $ 4,697 $ 1,485 Cash equivalents $ 950 2,844 Short-term investments $ 32,419 30,870 Total $ 38,066 $ 35,199
Cash Equivalents and Investments	Cash equivalents and investments were as follows at September 30, 2019 and December 31, 2018: September 30, 2019 December 31, 2018 Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Cash equivalents: Corporate bonds $ 0 $ 504 $ 0 $ 504 $ 0 $ 1,156 $ 0 $ 1,156 Certificates of deposit 0 0 0 $ 0 0 0 0 0 Money market funds 446 0 0 $ 446 1,688 0 0 1,688 Total Cash Equivalents $ 446 $ 504 $ 0 $ 950 $ 1,688 $ 1,156 $ 0 $ 2,844 Investments: Corporate bonds $ 0 $ 27,640 $ 0 $ 27,640 $ 0 $ 21,583 $ 0 $ 21,583 US government agency bonds 0 729 0 $ 729 0 5,671 0 5,671 Certificates of deposit 4,050 0 0 $ 4,050 3,616 0 0 3,616 Total Investments $ 4,050 $ 28,369 $ 0 $ 32,419 $ 3,616 $ 27,254 $ 0 $ 30,870 Cash equivalents and Investments - book value $ 4,496 $ 28,873 $ 0 $ 33,369 $ 5,304 $ 28,410 $ 0 $ 33,714 Cash equivalents and Investments - fair value $ 4,497 $ 28,842 $ 0 $ 33,339 $ 5,304 $ 28,389 $ 0 $ 33,693

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets (Tables)	9 Months Ended
	Sep. 30, 2019
Goodwill And Intangible Assets Disclosure [Abstract]
Summary of Amortization Expense	The summary of amortization expense in the consolidated statement of operations is as follows: Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 Cost of revenues $ 167 $ 167 $ 500 $ 500 Operating expenses 48 85 170 333 Total $ 215 $ 252 $ 670 $ 833
Summary of Other Intangible Assets	The summary of other intangible assets, net is as follows: September 30, 2019 December 31, 2018 Accumulated Net Book Accumulated Net Book Cost Amortization Value Cost Amortization Value Customer contracts and relationships $ 16,880 $ 16,880 $ 0 $ 16,880 $ 16,880 $ 0 Patents and technology 10,114 9,836 278 10,114 9,336 778 Trademarks and trade names 4,834 4,753 81 4,834 4,607 227 Other 2,506 2,506 0 2,506 2,482 24 Total $ 34,334 $ 33,975 $ 359 $ 34,334 $ 33,305 $ 1,029
Summary of Assigned Lives and Weighted Average Amortization Periods by Intangible Asset Category	The assigned lives and weighted average amortization periods by intangible asset category are summarized below: Intangible Assets Assigned Life Weighted Average Amortization Period Customer contracts and relationships 5 years 5.0 Patents and technology 5 to 6 years 5.1 Trademarks and trade names 5 to 6 years 5.6 Other 1 to 6 years 3.0
Schedule of Expected Amortization Expense	The Company’s intangible amortization is scheduled through February 2020. The amortization expense for 2019 and 2020 is as follows: Fiscal Year Amount 2019 $ 885 2020 $ 144

Balance Sheet Information (Tabl

Balance Sheet Information (Tables)	9 Months Ended
	Sep. 30, 2019
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Summary of Inventories	Inventories consisted of the following: September 30, 2019 December 31, 2018 Raw materials $ 6,748 $ 7,023 Work-in-process 1,256 1,388 Finished goods 5,573 4,437 Inventories, net $ 13,577 $ 12,848
Summary of Property and Equipment	Property and equipment consisted of the following: September 30, 2019 December 31, 2018 Building $ 6,389 $ 6,351 Computers and office equipment 10,677 10,963 Manufacturing and test equipment 14,276 13,573 Furniture and fixtures 1,326 1,318 Leasehold improvements 1,565 1,529 Motor vehicles 20 20 Total property and equipment 34,253 33,754 Less: Accumulated depreciation and amortization (24,914 ) (23,386 ) Land 1,770 1,770 Property and equipment, net $ 11,109 $ 12,138
Summary of Accrued Liabilities	Accrued liabilities consisted of the following: September 30, 2019 December 31, 2018 Payroll, bonuses, and other employee benefits $ 3,091 $ 1,409 Inventory receipts 1,885 1,396 Paid time off 932 936 Short-term obligations under operating leases 479 0 Professional fees and contractors 435 346 Warranties 400 339 Restructuring 344 33 Deferred revenues 152 149 Income and sales taxes 147 186 Customer refunds for estimated returns 126 154 Real estate taxes 107 148 Short-term obligations under finance leases 80 91 Employee stock purchase plan 0 343 Other 249 271 Total $ 8,427 $ 5,801
Summary of Long-term Liabilities	Long-term liabilities consisted of the following: September 30, 2019 December 31, 2018 Finance leases $ 182 $ 132 Operating leases 2,552 0 Deferred Rent 0 87 Other 236 162 Total $ 2,970 $ 381

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	9 Months Ended
	Sep. 30, 2019
Summary of Stock-Based Compensation Expense by Type	The stock-based compensation expense by type is as follows: Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 Service-based awards $ 472 $ 730 $ 1,942 $ 2,404 Performance-based awards - short-term incentive plan 361 0 990 0 Performance-based awards - long-term incentive plan 56 0 170 0 Stock option and employee purchase plans 29 56 144 168 Total $ 918 $ 786 $ 3,246 $ 2,572
Stock-Based Compensation	Total stock-based compensation is reflected in the condensed consolidated statements of operations as follows: Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 Cost of revenues $ 87 $ (49 ) $ 292 $ 131 Research and development 158 165 507 462 Sales and marketing 158 174 521 462 General and administrative 515 496 1,926 1,517 Total $ 918 $ 786 $ 3,246 $ 2,572
Summary of Stock Option Activity	A summary of the Company’s stock option activity for the nine months ended September 30, 2019 is as follows: Options Outstanding Weighted Average Exercise Price Outstanding at December 31, 2018 423,534 $ 7.15 Options exercised (500 ) 7.22 Options cancelled/expired (114,929 ) 7.16 Outstanding at September 30, 2019 308,105 $ 7.14 Exercisable at September 30, 2019 304,703 $ 7.16
Information about Stock Options Outstanding Under all Stock Plans	The following table summarizes information about stock options outstanding under all stock option plans: Options Outstanding Options Exercisable Range of Exercise Prices Number Outstanding Weighted Average Contractual Life (Years) Weighted- Average Exercise Price Number Exercisable Weighted Average Exercise Price $ 5.00 - $ 7.15 17,459 2.70 $ 6.02 14,057 $ 6.08 $ 7.16 185,041 0.53 7.16 185,041 7.16 $ 7.22 93,105 0.51 7.22 93,105 7.22 $ 7.23 - $ 8.32 12,500 1.52 7.86 12,500 7.86 $ 5.00 - $ 8.32 308,105 0.68 $ 7.14 304,703 $ 7.16
Weighted Average Contractual Life and Intrinsic Value of the Options Outstanding and Options Exercisable	The weighted average contractual life and intrinsic value of options outstanding and options exercisable at September 30, 2019, was the following: Weighted Average Contractual Life (years) Intrinsic Value Options Outstanding 0.68 $ 388 Options Exercisable 0.64 $ 379
Calculation of Fair Value of Each Employee Stock Purchase Grant Using Black-Scholes Option-Pricing Model	The Company calculated the fair value of each employee stock purchase grant on the date of grant using the Black-Scholes option-pricing model using the following assumptions: Employee Stock Purchase Plan 2019 2018 Dividend yield 4.1 % 3.2 % Risk-free interest rate 2.5 % 2.1 % Expected volatility 34 % 33 % Expected life (in years) 0.5 0.5
Restricted Stock [Member]
Summary of Service-based Restricted Stock Activity	The following table summarizes service-based restricted stock activity for the nine months ended September 30, 2019: Shares Weighted Average Fair Value Unvested Restricted Stock Awards - December 31, 2018 838,967 $ 6.21 Shares awarded 190,159 5.25 Shares vested (410,013 ) 6.25 Shares cancelled (12,226 ) 6.34 Unvested Restricted Stock Awards - September 30, 2019 606,887 $ 5.88
Restricted Stock Units [Member]
Summary of Service-based Restricted Stock Activity	The following table summarizes the restricted stock unit activity during the nine months ended September 30, 2019: Shares Weighted Average Fair Value Unvested Restricted Stock Units - December 31, 2018 18,638 $ 5.66 Units awarded 2,700 5.27 Units vested/Shares awarded (5,721 ) 5.67 Unvested Restricted Stock Units - September 30, 2019 15,617 $ 5.48

Benefit Plans (Tables)

Benefit Plans (Tables)	9 Months Ended
	Sep. 30, 2019
Compensation And Retirement Disclosure [Abstract]
Summary of Contributions to Retirement Plans	The Company’s contributions to retirement plans were as follows: Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 PCTEL, Inc. 401(k) profit sharing plan - US employees $ 165 $ 158 $ 484 $ 523 Defined contribution plans - foreign employees 111 137 356 400 Total $ 276 $ 295 $ 840 $ 923

Commitments and Contingencies (

Commitments and Contingencies (Tables)	9 Months Ended
	Sep. 30, 2019
Commitments And Contingencies Disclosure [Abstract]
Summary of Restructuring Activity	The Company recorded $0.3 million of restructuring expense for the three and nine months ended September 30, 2019 and $0 for the three and nine months ended September 30, 2018. The following table summarizes the restructuring activity during the nine months ended September 30, 2019 and the status of the reserves at September 30, 2019: China Colorado Restructuring Restructuring Total Balance at December 31, 2018 $ 0 $ 77 $ 77 Restructuring expense 295 0 $ 295 Foreign currency adjustment (1 ) 0 $ (1 ) Payments made 0 (105 ) $ (105 ) Payments received 0 79 $ 79 Balance at September 30, 2019 $ 294 $ 51 $ 345
Schedule of Restructuring Liability Recorded	The restructuring liability is recorded on the balance sheet at September 30, 2019 and December 31, 2018 as follows: September 30, 2019 December 31, 2018 Accrued liabilities $ 344 $ 33 Long-term liabilities 1 44 Total $ 345 $ 77
Summary of Warranty Activity	The following table summarizes the warranty activity during the nine months ended September 30, 2019 and 2018: Nine Months Ended September 30, 2019 2018 Beginning balance $ 339 $ 382 Provisions for warranties 207 65 Consumption of reserves (146 ) (46 ) Ending balance $ 400 $ 401

Leases (Tables)

Leases (Tables)	9 Months Ended
	Sep. 30, 2019
Leases [Abstract]
Components of Lease Cost	The Company's lease cost for the nine months ended September 30, 2019 included the following components: Three Months ended September 30, 2019 Nine Months ended September 30, 2019 Operating lease costs $ 238 $ 673 Short-term lease costs 20 71 Amortization of finance lease assets 27 78 Interest on finance lease liabilities 2 6 Total lease cost $ 287 $ 828
Schedule of Future Minimum Lease Payments under Operating and Finance Leases	The table below summarizes the Company's scheduled future minimum lease payments under operating and finance leases recorded on the balance sheet as of September 30, 2019: Year Operating Leases Finance Leases 2019 $ 228 $ 23 2020 305 86 2021 472 73 2022 558 48 2023 569 32 Thereafter 3,756 20 Total minimum payments required 5,888 282 Less: present value of tenant allowance 1,448 0 Less: amount representing interest 1,409 20 Present value of net minimum lease payments 3,031 262 Less: current maturities of lease obligations (479 ) (80 ) Long-term lease obligations $ 2,552 $ 182
Summary of Weighted Average Remaining Lease Terms and Discount Rates	The weighted average remaining lease terms and discount rates for all the Company’s operating and finance leases were as follows as of September 30, 2019: September 30, 2019 Weighted-average remaining lease term - finance leases 3.77 years Weighted-average remaining lease term - operating leases 9.01 years Weighted-average discount rate - finance leases 4% Weighted-average discount rate - operating leases 5%
Schedule of Supplemental Cash Flow Information Related to Leases	The table below presents supplemental cash flow information related to leases during the nine months ended September 30, 2019: September 30, 2019 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows for operating leases $ 684 Operating cash flows for finance leases $ 6 Financing cash flows for finance leases $ 79
Schedule of Classification of ROU Assets and Lease liabilities	The following table summarizes the classification of ROU assets and lease liabilities as of September 30, 2019: Leases Consolidated Balance Sheet Classification September 30, 2019 Assets: Operating right-of-use assets Other noncurrent assets $ 2,931 Finance right-of-use assets Other noncurrent assets 254 Total leased assets $ 3,185 Liabilities: Current Operating lease liabilities Accrued liabilities $ 479 Finance lease liabilities Accrued liabilities 80 Noncurrent Operating lease liabilities Long-term liabilities 2,552 Finance lease liabilities Long-term liabilities 182 Total lease liabilities $ 3,293
Schedule of Future Minimum Rental Payments Under Operating Leases	In accordance with the disclosure requirements for our adoption of Topic 842, the Company is presenting the operating lease commitments table under Topic 840 as of December 31, 2018. The following table is unchanged from the disclosure in Note 7 in the 2018 Form 10-K: Year Amount 2019 $ 1,176 2020 518 2021 145 2022 146 2023 131 Thereafter 137 Future minimum lease payments $ 2,253

Product Line, Customer and Ge_2

Product Line, Customer and Geographic Information (Tables)	9 Months Ended
	Sep. 30, 2019
Result of Product Line Revenues and Gross Profits	The following tables are the product line revenues and gross profits for the three and nine months ended September 30, 2019 and 2018. Three Months Ended September 30, 2019 Antenna Products Test & Measurement Corporate Total Revenues $ 16,463 $ 7,240 $ (73 ) $ 23,630 Gross Profit $ 5,712 $ 4,937 $ (2 ) $ 10,647 Gross Profit % 34.7 % 68.2 % NA 45.1 % Nine Months Ended September 30, 2019 Antenna Products Test & Measurement Corporate Total Revenues $ 47,565 $ 20,301 $ (146 ) $ 67,720 Gross Profit $ 16,142 $ 13,834 $ 24 $ 30,000 Gross Profit % 33.9 % 68.1 % NA 44.3 % Three Months Ended September 30, 2018 Antenna Products Test & Measurement Corporate Total Revenues $ 14,877 $ 3,556 $ (7 ) $ 18,426 Gross Profit $ 4,504 $ 2,201 $ 16 $ 6,721 Gross Profit % 30.3 % 61.9 % NA 36.5 % Nine Months Ended September 30, 2018 Antenna Products Test & Measurement Corporate Total Revenues $ 50,120 $ 11,691 $ (72 ) $ 61,739 Gross Profit $ 14,734 $ 7,627 $ 23 $ 22,384 Gross Profit % 29.4 % 65.2 % NA 36.3 %
Customers Accounted Revenues by Geographic Location	The Company’s revenue from customers by geographic location, as a percent of total revenues, is as follows: Three Months Ended September 30, Nine Months Ended September 30, Region 2019 2018 2019 2018 Europe, Middle East, & Africa 12% 13% 13% 11% Asia Pacific 6% 17% 9% 17% Other Americas 4% 5% 3% 4% Total Foreign sales 22% 35% 25% 32%
Sales [Member]
Schedule of Revenues and Total Trade Accounts Receivable Represents Customers Accounted for 10% or More Percentage	There were no customers that accounted for 10% or more of revenues during the three and nine months ended September 30, 2019 and 2018.
Trade Accounts Receivable [Member]
Schedule of Revenues and Total Trade Accounts Receivable Represents Customers Accounted for 10% or More Percentage	The following table represents the customers that accounted for 10% or more of total trade accounts receivable at September 30, 2019 and December 31, 2018. Trade Accounts Receivable September 30, 2019 December 31, 2018 Customer A 16% 9% Customer B 15% 13% Customer C 12% 1%

Basis of Presentation - Additio

Basis of Presentation - Additional Information (Detail) $ in Thousands	Jul. 31, 2018Segment	Sep. 30, 2019USD ($)	Sep. 30, 2018USD ($)	Sep. 30, 2019USD ($)	Sep. 30, 2018USD ($)	Jan. 01, 2019USD ($)
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Number of operating segments | Segment	2
Net foreign exchange gains (losses) resulting from foreign currency transactions included in other income		$ 198	$ 37	$ 226	$ 28
Total right-of-use assets		3,185		3,185		$ 1,500
Total lease liabilities		$ 3,293		$ 3,293		$ 1,600

Earnings per Share - Computatio

Earnings per Share - Computation of Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Numerator:
Net income (loss)	$ 1,328	$ (1,670)	$ 1,952	$ (3,754)
Denominator:
Common shares outstanding	17,922	17,234	17,792	17,145
Net income (loss) per common share - basic
Net income (loss)	$ 0.07	$ (0.10)	$ 0.11	$ (0.22)
Weighted Average Shares:
Common shares outstanding	17,922	17,234	17,792	17,145
Common stock option grants	1		1
Total shares	18,181	17,234	18,105	17,145
Net income (loss) per common share - diluted
Net income (loss)	$ 0.07	$ (0.10)	$ 0.11	$ (0.22)
Performance Related Awards [Member]
Weighted Average Shares:
Performance related awards/Restricted shares subject to vesting	52		162
Restricted Stock [Member]
Weighted Average Shares:
Performance related awards/Restricted shares subject to vesting	206		150

Earnings per Share - Computat_2

Earnings per Share - Computation of Basic and Diluted Earnings Per Share (Parenthetical) (Detail) - shares	3 Months Ended	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2018
Earnings Per Share [Abstract]
Antidilutive shares excluded	274,000	566,000

Cash, Cash Equivalents and In_3

Cash, Cash Equivalents and Investments - Cash and Cash Equivalents and Investments (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Cash And Cash Equivalents [Abstract]
Cash	$ 4,697	$ 1,485
Cash equivalents	950	2,844
Short-term investments	32,419	30,870
Cash and investments	$ 38,066	$ 35,199

Cash, Cash Equivalents and In_4

Cash, Cash Equivalents and Investments - Additional Information (Detail) - USD ($)	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2019	Dec. 31, 2018
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents maturities		90 days	90 days
Investment of cash equivalents are redeemable upon demand using amortized cost method		$ 1
Investment in money market funds restricted by investment in short term securities, percentage	100.00%	100.00%
Cash and cash equivalents in foreign bank	$ 2,800,000	$ 2,800,000	$ 800,000
Short-term investments, maturities, minimum		90 days
Short-term investments, maturities, maximum		1 year
Net unrealized losses		$ 29,000	21,000
Israel [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Foreign earnings repatriated	200,000
China [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash in foreign bank	2,800,000	2,800,000	$ 600,000
Maximum [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Federal Deposit Insurance Corporation insured limit	$ 250,000	$ 250,000

Cash, Cash Equivalents and In_5

Cash, Cash Equivalents and Investments - Cash Equivalents and Investments (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents	$ 950	$ 2,844
Investments	32,419	30,870
Cash equivalents and Investments - book value	33,369	33,714
Cash equivalents and Investments - fair value	33,339	33,693
Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents	446	1,688
Investments	4,050	3,616
Cash equivalents and Investments - book value	4,496	5,304
Cash equivalents and Investments - fair value	4,497	5,304
Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents	504	1,156
Investments	28,369	27,254
Cash equivalents and Investments - book value	28,873	28,410
Cash equivalents and Investments - fair value	28,842	28,389
Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents	0	0
Investments	0	0
Cash equivalents and Investments - book value	0	0
Cash equivalents and Investments - fair value	0	0
Corporate Bonds [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents	504	1,156
Investments	27,640	21,583
Corporate Bonds [Member] | Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents	0	0
Investments	0	0
Corporate Bonds [Member] | Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents	504	1,156
Investments	27,640	21,583
Corporate Bonds [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents	0	0
Investments	0	0
Certificates of Deposit [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents	0	0
Investments	4,050	3,616
Certificates of Deposit [Member] | Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents	0	0
Investments	4,050	3,616
Certificates of Deposit [Member] | Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents	0	0
Investments	0	0
Certificates of Deposit [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents	0	0
Investments	0	0
Money Market Funds [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents	446	1,688
Money Market Funds [Member] | Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents	446	1,688
Money Market Funds [Member] | Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents	0	0
Money Market Funds [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents	0	0
U.S. Government Agency Bonds [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments	729	5,671
U.S. Government Agency Bonds [Member] | Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments	0	0
U.S. Government Agency Bonds [Member] | Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments	729	5,671
U.S. Government Agency Bonds [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments	$ 0	$ 0

Goodwill and Intangible Assets

Goodwill and Intangible Assets - Additional Information (Detail) - USD ($)	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019	Dec. 31, 2018
Finite Lived Intangible Assets [Line Items]
Change in goodwill	$ 0	$ 0
Goodwill	$ 3,332,000	3,332,000	$ 3,332,000
Increase (decrease) in cost of intangible assets		$ 700,000
Minimum [Member]
Finite Lived Intangible Assets [Line Items]
Amortization of intangible assets basis over estimated useful lives		1 year
Maximum [Member]
Finite Lived Intangible Assets [Line Items]
Amortization of intangible assets basis over estimated useful lives		6 years

Goodwill and Intangible Asset_2

Goodwill and Intangible Assets - Summary Of Amortization Expense (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Finite Lived Intangible Assets [Line Items]
Amortization expense, total	$ 215	$ 252	$ 670	$ 833
Cost of Revenues [Member]
Finite Lived Intangible Assets [Line Items]
Amortization expense, total	167	167	500	500
Operating Expense [Member]
Finite Lived Intangible Assets [Line Items]
Amortization expense, total	$ 48	$ 85	$ 170	$ 333

Goodwill and Intangible Asset_3

Goodwill and Intangible Assets - Summary of Other Intangible Assets (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Finite Lived Intangible Assets [Line Items]
Cost	$ 34,334	$ 34,334
Accumulated Amortization	33,975	33,305
Net Book Value	359	1,029
Customer Contracts and Relationships [Member]
Finite Lived Intangible Assets [Line Items]
Cost	16,880	16,880
Accumulated Amortization	16,880	16,880
Net Book Value	0	0
Patents and Technology [Member]
Finite Lived Intangible Assets [Line Items]
Cost	10,114	10,114
Accumulated Amortization	9,836	9,336
Net Book Value	278	778
Trademarks and Trade Names [Member]
Finite Lived Intangible Assets [Line Items]
Cost	4,834	4,834
Accumulated Amortization	4,753	4,607
Net Book Value	81	227
Other [Member]
Finite Lived Intangible Assets [Line Items]
Cost	2,506	2,506
Accumulated Amortization	2,506	2,482
Net Book Value	$ 0	$ 24

Goodwill and Intangible Asset_4

Goodwill and Intangible Assets - Summary of Assigned Lives and Weighted Average Amortization Periods by Intangible Asset Category (Detail)	9 Months Ended
	Sep. 30, 2019
Minimum [Member]
Summary of assigned lives and weighted average amortization periods by intangible asset category
Assigned Life	1 year
Maximum [Member]
Summary of assigned lives and weighted average amortization periods by intangible asset category
Assigned Life	6 years
Customer Contracts and Relationships [Member]
Summary of assigned lives and weighted average amortization periods by intangible asset category
Assigned Life	5 years
Weighted Average Amortization Period	5 years
Patents and Technology [Member]
Summary of assigned lives and weighted average amortization periods by intangible asset category
Weighted Average Amortization Period	5 years 1 month 6 days
Patents and Technology [Member] | Minimum [Member]
Summary of assigned lives and weighted average amortization periods by intangible asset category
Assigned Life	5 years
Patents and Technology [Member] | Maximum [Member]
Summary of assigned lives and weighted average amortization periods by intangible asset category
Assigned Life	6 years
Trademarks and Trade Names [Member]
Summary of assigned lives and weighted average amortization periods by intangible asset category
Weighted Average Amortization Period	5 years 7 months 6 days
Trademarks and Trade Names [Member] | Minimum [Member]
Summary of assigned lives and weighted average amortization periods by intangible asset category
Assigned Life	5 years
Trademarks and Trade Names [Member] | Maximum [Member]
Summary of assigned lives and weighted average amortization periods by intangible asset category
Assigned Life	6 years
Other [Member]
Summary of assigned lives and weighted average amortization periods by intangible asset category
Weighted Average Amortization Period	3 years
Other [Member] | Minimum [Member]
Summary of assigned lives and weighted average amortization periods by intangible asset category
Assigned Life	1 year
Other [Member] | Maximum [Member]
Summary of assigned lives and weighted average amortization periods by intangible asset category
Assigned Life	6 years

Goodwill and Intangible Asset_5

Goodwill and Intangible Assets - Schedule of Expected Amortization Expense (Detail) $ in Thousands	Sep. 30, 2019USD ($)
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2019	$ 885
2020	$ 144

Balance Sheet Information - Add

Balance Sheet Information - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Allowance for doubtful accounts	$ 95		$ 95		$ 63
Consigned inventory with customers	200		200		900
Allowance for inventory losses	3,400		3,400		$ 3,300
Depreciation and amortization	$ 700	$ 700	$ 2,100	$ 2,100
Equipment [Member]
Property, Plant and Equipment [Line Items]
Period over which assets are depreciated			5 years
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Period over which assets are depreciated			7 years
Building [Member]
Property, Plant and Equipment [Line Items]
Period over which assets are depreciated			30 years
Minimum [Member]
Property, Plant and Equipment [Line Items]
Standard term of accounts receivable			30 days
Minimum [Member] | Computer Equipment [Member]
Property, Plant and Equipment [Line Items]
Period over which assets are depreciated			3 years
Maximum [Member]
Property, Plant and Equipment [Line Items]
Standard term of accounts receivable			90 days
Useful lives of the assets			1 year
Maximum [Member] | Computer Equipment [Member]
Property, Plant and Equipment [Line Items]
Period over which assets are depreciated			5 years

Balance Sheet Information - Sum

Balance Sheet Information - Summary of Inventories (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Inventory Net [Abstract]
Raw materials	$ 6,748	$ 7,023
Work-in-process	1,256	1,388
Finished goods	5,573	4,437
Inventories, net	$ 13,577	$ 12,848

Balance Sheet Information - S_2

Balance Sheet Information - Summary of Property and Equipment (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 34,253	$ 33,754
Less: Accumulated depreciation and amortization	(24,914)	(23,386)
Land	1,770	1,770
Property and equipment, net	11,109	12,138
Building [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	6,389	6,351
Computers and Office Equipment [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	10,677	10,963
Manufacturing and Test Equipment [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	14,276	13,573
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	1,326	1,318
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	1,565	1,529
Motor Vehicles [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 20	$ 20

Balance Sheet Information - S_3

Balance Sheet Information - Summary of Accrued Liabilities (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Payables And Accruals [Abstract]
Payroll, bonuses, and other employee benefits	$ 3,091	$ 1,409
Inventory receipts	1,885	1,396
Paid time off	932	936
Short-term obligations under operating leases	479	0
Professional fees and contractors	435	346
Warranties	400	339
Restructuring	344	33
Deferred revenues	152	149
Income and sales taxes	147	186
Customer refunds for estimated returns	126	154
Real estate taxes	107	148
Short-term obligations under finance leases	80	91
Employee stock purchase plan	0	343
Other	249	271
Total	$ 8,427	$ 5,801

Balance Sheet Information - S_4

Balance Sheet Information - Summary of Long-term Liabilities (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Liabilities Noncurrent [Abstract]
Finance leases	$ 182	$ 132
Operating leases	2,552	0
Deferred Rent	0	87
Other	236	162
Total	$ 2,970	$ 381

Stock-Based Compensation - Addi

Stock-Based Compensation - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Stock compensation expense	$ 918	$ 786	$ 3,246	$ 2,572

Stock-Based Compensation - Summ

Stock-Based Compensation - Summary of Stock-Based Compensation Expense by Type (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Stock Based Compensation [Line Items]
Total	$ 918	$ 786	$ 3,246	$ 2,572
Service-based Awards [Member]
Stock Based Compensation [Line Items]
Total	472	730	1,942	2,404
Performance-based Awards - Short-term Incentive Plan [Member]
Stock Based Compensation [Line Items]
Total	361	0	990	0
Performance-based Awards - Long-term Incentive Plan [Member]
Stock Based Compensation [Line Items]
Total	56	0	170	0
Stock Option and Employee Purchase Plans [Member]
Stock Based Compensation [Line Items]
Total	$ 29	$ 56	$ 144	$ 168

Stock-Based Compensation - Stoc

Stock-Based Compensation - Stock-Based Compensation (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock compensation expense	$ 918	$ 786	$ 3,246	$ 2,572
Cost of Revenues [Member]
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock compensation expense	87	(49)	292	131
Research and Development [Member]
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock compensation expense	158	165	507	462
Sales and Marketing [Member]
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock compensation expense	158	174	521	462
General and Administrative [Member]
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock compensation expense	$ 515	$ 496	$ 1,926	$ 1,517

Stock-Based Compensation - Rest

Stock-Based Compensation - Restricted Stock - Service-Based - Additional Information (Detail) - Service Based Restricted Stock [Member] - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock awards issued during the period			190,159
Grants vesting period			3 years
Restricted shares vested grant date intrinsic value	$ 32	$ 36	$ 2,200	$ 800
Unrecognized compensation expense	$ 2,000		$ 2,000
Weighted average period			1 year 3 months 18 days

Stock-Based Compensation - Su_2

Stock-Based Compensation - Summary of Service-based Restricted Stock Activity (Detail) - Restricted Stock [Member] shares in Thousands	9 Months Ended
	Sep. 30, 2019$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested Beginning balance, Shares | shares	838,967
Shares awarded, Shares | shares	190,159
Shares vested, Shares | shares	(410,013)
Shares cancelled, Shares | shares	(12,226)
Unvested Ending balance, Shares | shares	606,887
Unvested Beginning balance, Weighted Average Fair Value | $ / shares	$ 6.21
Shares awarded, Weighted Average Fair Value | $ / shares	5.25
Shares vested, Weighted Average Fair Value | $ / shares	6.25
Shares cancelled, Weighted Average Fair Value | $ / shares	6.34
Unvested Ending balance, Weighted Average Fair Value | $ / shares	$ 5.88

Stock-Based Compensation - Su_3

Stock-Based Compensation - Summary of Restricted Stock Unit Activity (Detail) - Restricted Stock Units [Member] shares in Thousands	9 Months Ended
	Sep. 30, 2019$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested Beginning balance, Shares | shares	18,638
Units awarded, Shares | shares	2,700
Units vested/Shares awarded, Shares | shares	(5,721)
Unvested Ending balance, Shares | shares	15,617
Unvested Beginning balance, Weighted Average Fair Value | $ / shares	$ 5.66
Units awarded, Weighted Average Fair Value | $ / shares	5.27
Units vested/Shares awarded, Weighted Average Fair Value | $ / shares	5.67
Unvested Ending balance, Weighted Average Fair Value | $ / shares	$ 5.48

Stock-Based Compensation - Re_2

Stock-Based Compensation - Restricted Stock Units - Service-Based - Additional Information (Detail) - Service Based Restricted Stock Units [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares vested grant date intrinsic value	$ 0	$ 0	$ 30	$ 29
Unrecognized compensation expense	$ 30		$ 30
Weighted average period			1 year 2 months 12 days

Stock-Based Compensation - St_2

Stock-Based Compensation - Stock Options - Additional Information (Detail) $ / shares in Units, shares in Thousands, $ in Millions	9 Months Ended
	Sep. 30, 2019USD ($)$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Intrinsic value based on share price	$ 8.40
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee stock options vesting provisions, description	stock options have either a seven-year or ten-year life and generally vest over a period of four years, 25% after one year, and ratably on a monthly basis thereafter.
Options vested in remaining period	4 years
Options vesting percentage after one year	25.00%
Period of termination of employment	180 days
Lower range of exercise prices	$ 5
Upper range of exercise prices	$ 8.32
Stock options granted during the period | shares	0
Period of expected life, options granted	5 years
Unrecognized compensation expense | $	$ 2
Weighted average period	1 year 1 month 6 days
Stock Options [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options outstanding, granted period	7 years
Stock Options [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options outstanding, granted period	10 years

Stock-Based Compensation - Su_4

Stock-Based Compensation - Summary of Stock Option Activity (Detail) - Stock Options [Member] shares in Thousands	9 Months Ended
	Sep. 30, 2019$ / sharesshares
Summary Of Stock Option Activities [Line Items]
Options Outstanding, Beginning balance, Shares | shares	423,534
Options Outstanding, Exercised | shares	(500)
Options Outstanding, Cancelled/expired | shares	(114,929)
Options Outstanding, Ending balance, Shares | shares	308,105
Options Exercisable, Ending balance, Shares | shares	304,703
Weighted Average Exercise Price, Beginning balance | $ / shares	$ 7.15
Weighted Average Exercise Price, Exercised | $ / shares	7.22
Weighted Average Exercise Price, Options cancelled/expired | $ / shares	7.16
Weighted Average Exercise Price, Ending balance | $ / shares	7.14
Weighted Average Exercise Price, Exercisable | $ / shares	$ 7.16

Stock-Based Compensation - Info

Stock-Based Compensation - Information about Stock Options Outstanding Under all Stock Plans (Detail) shares in Thousands	9 Months Ended
	Sep. 30, 2019$ / sharesshares
Range One [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Lower range of exercise prices	$ 5
Upper range of exercise prices	$ 7.15
Options Outstanding, Number | shares	17,459
Options Outstanding, Weighted Average Contractual Life (Years)	2 years 8 months 12 days
Options Outstanding, Weighted-Average Exercise Price	$ 6.02
Options Exercisable, Number | shares	14,057
Options Exercisable, Weighted Average Exercise Price	$ 6.08
Range Two [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise prices	$ 7.16
Options Outstanding, Number | shares	185,041
Options Outstanding, Weighted Average Contractual Life (Years)	6 months 10 days
Options Outstanding, Weighted-Average Exercise Price	$ 7.16
Options Exercisable, Number | shares	185,041
Options Exercisable, Weighted Average Exercise Price	$ 7.16
Range Three [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise prices	$ 7.22
Options Outstanding, Number | shares	93,105
Options Outstanding, Weighted Average Contractual Life (Years)	6 months 3 days
Options Outstanding, Weighted-Average Exercise Price	$ 7.22
Options Exercisable, Number | shares	93,105
Options Exercisable, Weighted Average Exercise Price	$ 7.22
Range Four [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Lower range of exercise prices	7.23
Upper range of exercise prices	$ 8.32
Options Outstanding, Number | shares	12,500
Options Outstanding, Weighted Average Contractual Life (Years)	1 year 6 months 7 days
Options Outstanding, Weighted-Average Exercise Price	$ 7.86
Options Exercisable, Number | shares	12,500
Options Exercisable, Weighted Average Exercise Price	$ 7.86
Range Five [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Lower range of exercise prices	5
Upper range of exercise prices	$ 8.32
Options Outstanding, Number | shares	308,105
Options Outstanding, Weighted Average Contractual Life (Years)	8 months 4 days
Options Outstanding, Weighted-Average Exercise Price	$ 7.14
Options Exercisable, Number | shares	304,703
Options Exercisable, Weighted Average Exercise Price	$ 7.16

Stock-Based Compensation - Weig

Stock-Based Compensation - Weighted Average Contractual Life and Intrinsic Value of Options Outstanding and Options Exercisable (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2019USD ($)
Share Based Compensation Arrangement By Share Based Payment Award Options Additional Disclosures [Abstract]
Options Outstanding Weighted Average Contractual Life (years)	8 months 4 days
Options Exercisable Weighted Average Contractual Life (years)	7 months 20 days
Options Outstanding Intrinsic Value	$ 388
Options Exercisable Intrinsic Value	$ 379

Stock-Based Compensation - Perf

Stock-Based Compensation - Performance-Based Equity Awards - Additional Information (Detail) - 2019 LTIP - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	1 Months Ended	3 Months Ended	9 Months Ended
	Feb. 28, 2019	Sep. 30, 2019	Sep. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Revenue growth target performance period	3 years
Number of shares earned	171,437	2,680	2,680
Maximum number of shares that may be issued			300,015
Maximum number of earned shares declined		4,690	4,690
Revenue growth target performance period start date	Jan. 1, 2019
Revenue growth target performance period end date	Dec. 31, 2021
Total fair market value of award at target	$ 0.9
Share price at target, on grant date	$ 5.27

Stock-Based Compensation - Shor

Stock-Based Compensation - Short-Term Incentive Plan - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2019USD ($)
2019 STIP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance component, percentage of weighted revenue	20.00%
Performance component, percentage of weighted adjusted EBITDA	80.00%
2019 STIP | Certain Executives [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of incentive awards in shares	50.00%
Percentage of incentive awards in cash	50.00%
2019 STIP | All Other Participants [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of incentive awards in cash	100.00%
2018 STIP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Short term incentive award settled	$ 0

Stock-Based Compensation - Empl

Stock-Based Compensation - Employee Stock Purchase Plan ("ESPP") - Additional Information (Detail) - USD ($) shares in Thousands, $ in Millions	1 Months Ended				9 Months Ended
	Aug. 31, 2019	Feb. 28, 2019	Aug. 31, 2018	Feb. 28, 2018	Sep. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Offering period					6 months
Employee Stock Purchase Plan ("ESPP") [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of fair market value to determine purchase price					85.00%
Proceeds of from issuance of shares under ESPP	$ 0.4	$ 0.3	$ 0.3	$ 0.4
Options issued	85,483	95,376	88,583	68,212
Rate of discount on fair market value of common stock under ESPP					15.00%
Period of expected life, options granted					5 years

Stock-Based Compensation - Calc

Stock-Based Compensation - Calculation of Fair Value of Each Employee Stock Purchase Grant Using the Black-Scholes Option-Pricing Model (Detail) - Employee Stock Purchase Plan ("ESPP") [Member]	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Calculation of fair value of each employee stock purchase grant using the Black-Scholes option-pricing model
Dividend yield	4.10%	3.20%
Risk-free interest rate	2.50%	2.10%
Expected volatility	34.00%	33.00%
Expected life (in years)	6 months	6 months

Stock-Based Compensation - Boar

Stock-Based Compensation - Board of Director Equity Awards - Additional Information (Detail) - USD ($) $ in Millions	1 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
New Directors [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grants vesting period	3 years
Board of Directors [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock issued	79,918	60,988
Company's stock at fair value	$ 0.4	$ 0.4

Stock-Based Compensation - Em_2

Stock-Based Compensation - Employee Withholding Taxes on Stock Awards - Additional Information (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Payment of withholding taxes related to stock awards	$ 754	$ 301
Employee Withholding Taxes on Stock Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Payment of withholding taxes related to stock awards	$ 800	$ 300

Benefit Plans - Additional Info

Benefit Plans - Additional Information (Detail) - Employee Benefit Plans [Member]	9 Months Ended
	Sep. 30, 2019
Defined Benefit Plan Disclosure [Line Items]
Maximum percentage of current compensation of employee to contribute in plan	15.00%
Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Employer matches employee contribution percentage	4.00%

Benefit Plans - Summary of Cont

Benefit Plans - Summary of Contributions to Retirement Plans (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Defined Benefit Plan Disclosure [Line Items]
Contribution to retirement plans	$ 276	$ 295	$ 840	$ 923
US Employees [Member]
Defined Benefit Plan Disclosure [Line Items]
Contribution to retirement plans	165	158	484	523
Foreign Employees [Member]
Defined Benefit Plan Disclosure [Line Items]
Contribution to retirement plans	$ 111	$ 137	$ 356	$ 400

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Detail) $ in Thousands	Aug. 07, 2019USD ($)Position	Sep. 30, 2019USD ($)Employee	Sep. 30, 2018USD ($)	Sep. 30, 2019USD ($)Employee	Sep. 30, 2018USD ($)	Dec. 31, 2018USD ($)	Jun. 30, 2018USD ($)	Dec. 31, 2017USD ($)
Commitments And Contingencies Disclosure [Line Items]
Restructuring and related activities, initiation date	Aug. 7, 2019
Restructuring and related activities, description				The Company expects the transition to be substantially completed by the end of our 2020 fiscal year (the “Transition Period”)
Restructuring and related charges, description				The severance payments and related payroll costs for these employees were paid in October 2019. Recognition of the remaining restructuring expense will occur as the employees are notified of their termination.
Number of expected full-time global workforce positions eliminations | Position	140
Percentage of expected full time global workforce positions eliminations	35.00%
Severance costs	$ 900
Restructuring expenses		$ 295	$ 0	$ 295	$ 0
Number of manufacturing employees | Employee		49		49
Lease obligation		$ 3,031		$ 3,031
Refund liability related to estimated sales returns		126		126		$ 154
Warranties		400		400		339
Warranty Reserves [Member]
Commitments And Contingencies Disclosure [Line Items]
Refund liability related to estimated sales returns		100		100		200
Warranties		400	$ 400	$ 400	$ 400	$ 339	$ 401	$ 382
Warranty Reserves [Member] | Antenna [Member]
Commitments And Contingencies Disclosure [Line Items]
Repair and replacement warranty				5 years
Colorado Office [Member]
Commitments And Contingencies Disclosure [Line Items]
Restructuring expenses				$ 0
Lease obligation		$ 125		$ 125
Lease expiration month and year				2020-10
Sublease payments				$ 74
Severance and Other Transition Costs [Member]
Commitments And Contingencies Disclosure [Line Items]
Cumulative pre-tax charges	1,000
Contract Termination [Member]
Commitments And Contingencies Disclosure [Line Items]
Other non-cash costs of estimated fixed asset dispositions	$ 100

Commitments and Contingencies_2

Commitments and Contingencies - Summary of Restructuring Activity (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Restructuring Cost And Reserve [Line Items]
Beginning balance			$ 77
Restructuring expenses	$ 295	$ 0	295	$ 0
Foreign currency adjustment			(1)
Payments made			(105)
Payments received			79
Ending balance	345		345
China Restructuring [Member]
Restructuring Cost And Reserve [Line Items]
Beginning balance			0
Restructuring expenses			295
Foreign currency adjustment			(1)
Payments made			0
Payments received			0
Ending balance	294		294
Colorado Restructuring [Member]
Restructuring Cost And Reserve [Line Items]
Beginning balance			77
Restructuring expenses			0
Foreign currency adjustment			0
Payments made			(105)
Payments received			79
Ending balance	$ 51		$ 51

Commitments and Contingencies_3

Commitments and Contingencies - Summary of Restructuring Liability Recorded (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Restructuring Cost And Reserve [Line Items]
Restructuring liability	$ 345	$ 77
Accrued Liabilities [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring liability	344	33
Long-term Liabilities [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring liability	$ 1	$ 44

Commitments and Contingencies_4

Commitments and Contingencies - Summary of Warranty Activity (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Changes in warranty reserves
Beginning balance	$ 339
Ending balance	400
Warranty Reserves [Member]
Changes in warranty reserves
Beginning balance	339	$ 382
Provisions for warranties	207	65
Consumption of reserves	(146)	(46)
Ending balance	$ 400	$ 400

Leases - Additional Information

Leases - Additional Information (Detail) $ in Thousands	1 Months Ended	9 Months Ended
	Jan. 31, 2019ft²	Sep. 30, 2019USD ($)	Aug. 31, 2019USD ($)	Jan. 01, 2019USD ($)
Leases [Line Items]
Total right-of-use assets		$ 3,185		$ 1,500
Total lease liabilities		3,293		$ 1,600
Operating right-of-use assets		2,931	$ 2,100
Tenant improvement incentives in form of cash reimbursements		$ 1,448
Rent abatement duration		14 months
Lease description	In January 2019, the Company entered into an eleven-year lease ending February 28, 2031 for 21,030 square feet of office space in Clarksburg, Maryland for the Company’s test and measurement product line. The Company will move the operations for its test and measurement product line from its Germantown, Maryland office to the new office in the first quarter 2020.
Maximum [Member]
Leases [Line Items]
Tenant improvement incentives in form of cash reimbursements		$ 1,500
Test & Measurement Product Line [Member]
Leases [Line Items]
Operating lease term of contract	11 years
Area of lease | ft²	21,030
Lease expiration date	Feb. 28, 2031

Leases - Components of Lease Co

Leases - Components of Lease Cost (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019
Leases [Abstract]
Operating lease costs	$ 238	$ 673
Short-term lease costs	20	71
Amortization of finance lease assets	27	78
Interest on finance lease liabilities	2	6
Total lease cost	$ 287	$ 828

Leases - Schedule of Future Min

Leases - Schedule of Future Minimum Lease Payments under Operating and Finance Leases (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Operating Leases
2019	$ 228
2020	305
2021	472
2022	558
2023	569
Thereafter	3,756
Total minimum payments required	5,888
Less: present value of tenant allowance	1,448
Less: amount representing interest	1,409
Present value of net minimum lease payments	3,031
Less: current maturities of lease obligations	(479)	$ 0
Long-term lease obligations	2,552	0
Finance Leases
2019	23
2020	86
2021	73
2022	48
2023	32
Thereafter	20
Total minimum payments required	282
Less: present value of tenant allowance	0
Less: amount representing interest	20
Present value of net minimum lease payments	262
Less: current maturities of lease obligations	(80)	(91)
Long-term lease obligations	$ 182	$ 132

Leases - Summary of Weighted Av

Leases - Summary of Weighted Average Remaining Lease Terms and Discount Rates (Detail)	Sep. 30, 2019
Leases [Abstract]
Weighted-average remaining lease term - finance leases	3 years 9 months 7 days
Weighted-average remaining lease term - operating leases	9 years 3 days
Weighted-average discount rate - finance leases	4.00%
Weighted-average discount rate - operating leases	5.00%

Leases - Schedule of Supplement

Leases - Schedule of Supplemental Cash Flow Information Related to Leases (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Leases [Abstract]
Operating cash flows for operating leases	$ 684
Operating cash flows for finance leases	6
Financing cash flows for finance leases	$ 79	$ 91

Leases - Schedule of Classifica

Leases - Schedule of Classification of ROU Assets and Lease liabilities (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Aug. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
ASSETS
Operating right-of-use assets	$ 2,931	$ 2,100
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	us-gaap:OtherAssetsNoncurrent
Finance right-of-use assets	$ 254
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	us-gaap:OtherAssetsNoncurrent
Total leased assets	$ 3,185		$ 1,500
Current
Short-term obligations under operating leases	$ 479			$ 0
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:AccruedLiabilitiesCurrent
Short-term obligations under finance leases	$ 80			91
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:AccruedLiabilitiesCurrent
Noncurrent
Operating leases	$ 2,552			0
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	us-gaap:LiabilitiesNoncurrent
Finance leases	$ 182			$ 132
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	us-gaap:LiabilitiesNoncurrent
Total lease liabilities	$ 3,293		$ 1,600

Leases - Schedule of Future M_2

Leases - Schedule of Future Minimum Rental Payments Under Operating Leases (Detail) $ in Thousands	Dec. 31, 2018USD ($)
Operating Leases Future Minimum Payments Due [Abstract]
2019	$ 1,176
2020	518
2021	145
2022	146
2023	131
Thereafter	137
Future minimum lease payments	$ 2,253

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Income tax expense (benefit)	$ 6	$ (482)	$ 23	$ (961)
Statutory rate	21.00%	21.00%	21.00%	21.00%
Operating loss and credit carry forward, expiration period			The Company’s federal NOLs generated in 2019 and 2018 have an infinite life, and the Company’s NOLs and credits generated as of December 31, 2017 have a finite life primarily based on the 20-year carry forward of federal net operating losses.
Net operating loss carry forward period			20 years
Domestic deferred tax assets ratable reversal pattern period			12 years
Deferred tax assets, valuation allowance	$ 14,500		$ 14,500		$ 14,500
Cumulative terms of US book pre-tax income turned to pre-tax loss			3 years
Gross unrecognized tax benefit	$ 700		$ 700		$ 700

Product Line, Customer and Ge_3

Product Line, Customer and Geographic Information - Result of Product Line Revenues and Gross Profits (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Results of operations by segments
REVENUES	$ 23,630	$ 18,426	$ 67,720	$ 61,739
Gross Profit	$ 10,647	$ 6,721	$ 30,000	$ 22,384
Gross Profit %	45.10%	36.50%	44.30%	36.30%
Operating Segments [Member] | Antenna Products [Member]
Results of operations by segments
REVENUES	$ 16,463	$ 14,877	$ 47,565	$ 50,120
Gross Profit	$ 5,712	$ 4,504	$ 16,142	$ 14,734
Gross Profit %	34.70%	30.30%	33.90%	29.40%
Operating Segments [Member] | Test & Measurement Product Line [Member]
Results of operations by segments
REVENUES	$ 7,240	$ 3,556	$ 20,301	$ 11,691
Gross Profit	$ 4,937	$ 2,201	$ 13,834	$ 7,627
Gross Profit %	68.20%	61.90%	68.10%	65.20%
Corporate, Non-Segment [Member]
Results of operations by segments
REVENUES	$ (73)	$ (7)	$ (146)	$ (72)
Gross Profit	$ (2)	$ 16	$ 24	$ 23

Product Line, Customer and Ge_4

Product Line, Customer and Geographic Information - Customers Accounted Revenues by Geographic Location (Detail) - Sales [Member] - Geographic Concentration Risk [Member]	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Asia Pacific [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Sales	6.00%	17.00%	9.00%	17.00%
Europe, Middle East, & Africa [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Sales	12.00%	13.00%	13.00%	11.00%
Other Americas [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Sales	4.00%	5.00%	3.00%	4.00%
Total Foreign Sales [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Sales	22.00%	35.00%	25.00%	32.00%

Product Line, Customer and Ge_5

Product Line, Customer and Geographic Information - Schedule of Revenues and Total Trade Accounts Receivable Represents Customers Accounted for 10% or More Percentage (Detail) - Customer Concentration Risk - Trade Accounts Receivable [Member]	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Customer A [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk percentage	16.00%	9.00%
Customer B [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk percentage	15.00%	13.00%
Customer C [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk percentage	12.00%	1.00%

Revenue from Contracts with C_2

Revenue from Contracts with Customers - Additional Information (Detail) - USD ($)	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Disaggregation Of Revenue [Line Items]
Order shipments, description	A majority of the Company’s revenue is short cycle in nature with shipments within one year from order.
Payment terms, description	The Company's payment terms generally range between 30 to 90 days.
Refund liability	$ 126,000		$ 154,000
Contract assets	0		0
Contract with customer liability, revenue recognized	100,000	$ 100,000
Accrued Liabilities [Member]
Disaggregation Of Revenue [Line Items]
Refund liability	100,000		200,000
Contract liability	300,000		200,000
Inventories [Member]
Disaggregation Of Revenue [Line Items]
Product return asset	$ 100,000		$ 100,000

Revenue from Contracts with C_3

Revenue from Contracts with Customers - Additional Information1 (Detail)	Sep. 30, 2019
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2019-04-01
Disaggregation Of Revenue [Line Items]
Period for performance obligation to provide software maintenance and support	1 year

Subsequent Events - Additional

Subsequent Events - Additional Information (Detail) $ in Millions	Nov. 06, 2019USD ($)
Subsequent Events [Member] | Maximum [Member]
Subsequent Event [Line Items]
Number of shares authorized to be repurchased	$ 7