Organization and Summary of Significant Accounting Policies - Additional Information (Detail)		1 Months Ended		3 Months Ended	12 Months Ended
	Apr. 30, 2013 USD ($)	Oct. 31, 2015 USD ($)	Feb. 28, 2015 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2015 USD ($) Segment $ / shares	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2011 Reporting_Unit
Nature Of Operations [Line Items]
Number of operating segments | Segment					2
Net foreign exchange losses resulting from foreign currency transactions included in other income					$ 33,000	$ 49,000	$ 26,000
Cash and cash equivalents maturities					90 days
Investment of cash equivalents are redeemable upon demand using amortized cost method | $ / shares					$ 1.00
Investment in money market funds restricted by investment in short term securities, percentage				100.00%	100.00%
Cash				$ 6,077,000	$ 6,077,000	19,731,000
Cash equivalents				978,000	978,000	701,000
Cash and cash equivalents in foreign bank				1,300,000	1,300,000	500,000
Income tax expense (benefit)					(901,000)	1,158,000	2,332,000
Short-term investments				$ 24,728,000	$ 24,728,000	39,577,000
Short-term investments, maturities					90 days
Net unrealized gains (losses)					$ 1,000	$ (5,000)
Percentage of investment in bond protected by bond default insurance				11.00%	11.00%	5.00%
Allowance for doubtful accounts				$ 314,000	$ 314,000	$ 121,000
Consigned inventory with customers				700,000	700,000	800,000
Allowance for inventory losses				2,200,000	2,200,000	1,800,000
Depreciation and amortization					3,100,000	2,800,000	2,700,000
Advertising expense					212,000	$ 175,000	166,000
Most likely than not benefit likelihood percentage being realized upon ultimate settlement with taxing authority resulting from sustainability of tax examination						50.00%
Goodwill acquired					3,332,000
Goodwill				3,332,000	$ 3,332,000	$ 161,000	$ 161,000
Goodwill impairment test					October 31, 2015
Current deferred tax assets reclassified to long-term deferred tax assets				13,155,000	$ 13,155,000	9,710,000
Israel [Member]
Nature Of Operations [Line Items]
Income tax expense (benefit)					100,000
After Reclassification [Member]
Nature Of Operations [Line Items]
Current deferred tax assets reclassified to long-term deferred tax assets				1,800,000	1,800,000
Nexgen Wireless, Inc. [Member]
Nature Of Operations [Line Items]
Goodwill acquired			$ 3,300,000
Goodwill				3,332,000	3,332,000
Envision Wireless, Inc. [Member]
Nature Of Operations [Line Items]
Goodwill acquired					200,000
Maximum [Member]
Nature Of Operations [Line Items]
Federal Deposit Insurance Corporation insured limit				250,000	$ 250,000
Standard term of accounts receivable					60 days
Useful lives of the assets					1 year
Minimum [Member]
Nature Of Operations [Line Items]
Standard term of accounts receivable					30 days
Computer Equipment [Member] | Maximum [Member]
Nature Of Operations [Line Items]
Period over which assets are deprecated					5 years
Computer Equipment [Member] | Minimum [Member]
Nature Of Operations [Line Items]
Period over which assets are deprecated					3 years
Equipment [Member]
Nature Of Operations [Line Items]
Period over which assets are deprecated					5 years
Furniture and Fixtures [Member]
Nature Of Operations [Line Items]
Period over which assets are deprecated					7 years
Building [Member]
Nature Of Operations [Line Items]
Period over which assets are deprecated					30 years
Pctel Secure [Member]
Nature Of Operations [Line Items]
Royalty receivable as percentage of net sale price	7.00%				7.00%
Maximum royalty rate					$ 14,000,000
Pctel Secure [Member] | Maximum [Member]
Nature Of Operations [Line Items]
Maximum royalty rate	$ 10,000,000				10,000,000
RF Solutions [Member]
Nature Of Operations [Line Items]
Number of reporting units for goodwill testing purposes | Reporting_Unit								2
Goodwill		$ 102,500,000		100,500,000	100,500,000
Goodwill, fair value		100,000,000		80,300,000	80,300,000
Fair value inputs, control premium amount		9,300,000		9,300,000	9,300,000
Goodwill impairment		$ 200,000		200,000
Pre-refunded Municipal Bonds [Member]
Nature Of Operations [Line Items]
Short-term investments				7,500,000	7,500,000	5,200,000
Corporate Bonds [Member]
Nature Of Operations [Line Items]
Short-term investments				7,600,000	7,600,000	7,200,000
U.S. Government Agency Bonds [Member]
Nature Of Operations [Line Items]
Short-term investments				7,000,000	7,000,000	13,500,000
Certificates of Deposit [Member]
Nature Of Operations [Line Items]
Short-term investments				$ 2,700,000	$ 2,700,000	11,800,000
Mutual Funds [Member]
Nature Of Operations [Line Items]
Short-term investments						$ 2,000,000