Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.18)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 03
-Paragraph 12
-Article 7

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The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585

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The net result for the period of deducting operating expenses from operating revenues.

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Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Segment Information - Significant Segment Financial Data (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Net revenues	$ 51,394	$ 48,664	$ 56,119	$ 64,017	$ 60,735	$ 58,402	$ 53,361	$ 53,233	$ 220,194	$ 225,731	$ 199,160
Income (loss) from operations									(267)	(14,763)	(20,467)
Total assets	157,545				155,542				157,545	155,542	165,640
Depreciation and amortization									9,142	9,805	10,008
Operating Segments [Member] \| BBU [Member]
Segment Reporting Information [Line Items]
Net revenues									173,064	184,224	163,013
Income (loss) from operations									21,743	15,499	12,062
Total assets	170,939				151,923				170,939	151,923	126,585
Depreciation and amortization									4,538	4,711	6,185
Operating Segments [Member] \| VI Chip [Member]
Segment Reporting Information [Line Items]
Net revenues									36,688	34,701	35,333
Income (loss) from operations									(21,040)	(29,015)	(28,204)
Total assets	15,577				17,677				15,577	17,677	21,370
Depreciation and amortization									2,740	3,265	3,232
Operating Segments [Member] \| Picor [Member]
Segment Reporting Information [Line Items]
Net revenues									17,304	15,570	10,416
Income (loss) from operations									(290)	(407)	(3,326)
Total assets	5,369				5,691				5,369	5,691	4,308
Depreciation and amortization									442	410	407
Operating Segments [Member] \| Corporate [Member]
Segment Reporting Information [Line Items]
Income (loss) from operations									(680)	(840)	(999)
Total assets	81,824				75,758				81,824	75,758	81,364
Depreciation and amortization									1,422	1,419	184
Eliminations [Member]
Segment Reporting Information [Line Items]
Net revenues									(6,862)	(8,764)	(9,602)
Total assets	$ (116,164)				$ (95,507)				$ (116,164)	$ (95,507)	$ (67,987)