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Balance Sheet Details - Property and Equipment (Detail) (USD $)
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3 Months Ended | 6 Months Ended | 6 Months Ended | 6 Months Ended | 6 Months Ended | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Jun. 30, 2013
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Dec. 31, 2012
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Jun. 30, 2013
Furniture and fixtures [Member]
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Dec. 31, 2012
Furniture and fixtures [Member]
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Jun. 30, 2013
Machinery and equipment [Member]
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Dec. 31, 2012
Machinery and equipment [Member]
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Jun. 30, 2013
Machinery and equipment [Member]
Minimum [Member]
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Jun. 30, 2013
Machinery and equipment [Member]
Maximum [Member]
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Jun. 30, 2013
Masks and production equipment [Member]
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Dec. 31, 2012
Masks and production equipment [Member]
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Jun. 30, 2013
Software [Member]
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Dec. 31, 2012
Software [Member]
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Jun. 30, 2013
Leasehold improvements [Member]
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Dec. 31, 2012
Leasehold improvements [Member]
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Jun. 30, 2013
Leasehold improvements [Member]
Minimum [Member]
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Jun. 30, 2013
Leasehold improvements [Member]
Maximum [Member]
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Jun. 30, 2013
Construction in progress [Member]
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Dec. 31, 2012
Construction in progress [Member]
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| Supplemental Balance Sheet Disclosures [Abstract] | ||||||||||||||||||
| Production Mask Impairment Charge | $ 1,100,000 | |||||||||||||||||
| Property, Plant and Equipment [Line Items] | ||||||||||||||||||
| Useful life | 5 years | 3 years | 5 years | 2 years | 3 years | 4 years | 5 years | |||||||||||
| Property and equipment, Gross | 15,573,000 | 15,165,000 | 367,000 | 355,000 | 8,897,000 | 8,331,000 | 4,755,000 | 4,894,000 | 704,000 | 736,000 | 850,000 | 829,000 | 0 | 20,000 | ||||
| Less accumulated depreciation and amortization | (9,424,000) | (8,299,000) | ||||||||||||||||
| Property and equipment, net | $ 6,149,000 | $ 6,866,000 | ||||||||||||||||