Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	1 Months Ended		3 Months Ended		6 Months Ended		12 Months Ended		6 Months Ended	1 Months Ended		6 Months Ended	12 Months Ended	6 Months Ended	12 Months Ended
	Jun. 18, 2013	Jul. 31, 2012 Patents	Jun. 29, 2013 Y	Jun. 30, 2012	Jun. 29, 2013 Y	Jun. 30, 2012	Dec. 31, 2012	Dec. 31, 2011	Jun. 29, 2013 Patents and Licenses [Member]	Aug. 09, 2013 Subsequent Event [Member]	Aug. 01, 2013 Subsequent Event [Member]	Jun. 29, 2013 Customer One [Member]	Dec. 31, 2012 Customer One [Member]	Jun. 29, 2013 Customer Two [Member]	Dec. 31, 2012 Customer Two [Member]
Summary Of Significant Accounting Policies [Line Items]
Accumulated deficit			$ (266,788,000)		$ (266,788,000)		$ (261,944,000)
Incurred net loss			(2,436,000)	(3,419,000)	(4,844,000)	(6,407,000)	10,900,000
Negative cash flows from operations					3,791,000	5,456,000	8,200,000
Cash and cash equivalents			1,613,000	5,370,000	1,613,000	5,370,000	3,634,000	6,165,000
Proceeds from issuance of common stock and warrants										12,000,000	10,900,000
Product warranty period, Minimum					1
Product warranty period, Maximum					5
Selling, general and administrative expenses disposals			0	180,000	6,000	520,000
Selling, general and administrative expenses gains			0	22,000	6,000	37,000
Estimated useful lives									17 years
Patents expense					87,000
Number of patents contributed		14
Percentage of interest in Resonant	30.00%						30.00%
Net value of assets contributed included in Other assets	185,000						423,000
Value of subordinated convertible notes issued in exchange of equity interest in Resonant	2,400,000
Equity interest, carrying value			185,000		185,000
Percentage of interest in joint venture					45.00%
License agreement period					2 years
Minimum percentage of tax benefit realized					50.00%
Percentage of tax benefit claimed					100.00%
Net operating loss carryforwards for federal income tax							311,900,000
Net operating loss carryforwards for state income tax							$ 192,100,000
Net operating loss carryforwards, expiration period					The years 2013 through 2032
Minimum vesting period					2 years
Maximum vesting period					4 years
Contractual term (years)			10		10
Historical volatility					4 years
Expected dividend yield					0.00%
Forfeiture rate					15.00%		10.00%
Number of past years considered for assumed forfeiture rate					4 years
Sales revenue customers net percentage												63.00%	40.00%	34.00%	39.00%
Accounts receivable net percentage												55.00%	76.00%