| Balance Sheet Details |  4. Balance Sheet Details  Inventory consists of the following:    
|  |  |  |  |  |  |  |  |  |  
|  |  | December 31, |  |  
|  |  | 2011 |  |  | 2010 |  |  
| Work-in-process |  | $ | 3,641 |  |  | $ | 5,691 |  |  
| Finished goods |  |  | 4,441 |  |  |  | 1,734 |  |  
|  |  |   |   |  |  |   |   |  |  
|  |  | $ | 8,082 |  |  | $ | 7,425 |  |  
|  |  |   |   |  |  |   |   |  |  Property and equipment consist of the following:    
|  |  |  |  |  |  |  |  |  |  |  |  
|  |  | Useful Life (in Years)
 |  | December 31, |  |  
|  |  |  | 2011 |  |  | 2010 |  |  
| Furniture and fixtures |  | 5 |  | $ | 305 |  |  | $ | 275 |  |  
| Machinery and equipment |  | 3 -5 |  |  | 6,875 |  |  |  | 4,762 |  |  
| Masks and production equipment |  | 2 |  |  | 3,249 |  |  |  | 2,486 |  |  
| Software |  | 3 |  |  | 558 |  |  |  | 543 |  |  
| Leasehold improvements |  | 4 -5 |  |  | 489 |  |  |  | 151 |  |  
| Construction in progress |  | N/A |  |  | 6 |  |  |  | 144 |  |  
|  |  |  |  |   |   |  |  |   |   |  |  
|  |  |  |  |  | 11,482 |  |  |  | 8,361 |  |  
| Less accumulated depreciation and amortization |  |  |  |  | (5,988 | ) |  |  | (3,826 | ) |  
|  |  |  |  |   |   |  |  |   |   |  |  
|  |  |  |  | $ | 5,494 |  |  | $ | 4,535 |  |  
|  |  |  |  |   |   |  |  |   |   |  |    The net book value of property and equipment acquired under capital leases totaled $21 and $94 at December 31, 2011 and 2010, respectively.  Intangible assets consist of the following:    
|  |  |  |  |  |  |  |  |  |  |  |  |  |  
|  |  | Weighted Average
 Amortization
 Period
 (in Years)
 |  |  | December 31, |  |  
|  |  |  | 2011 |  |  | 2010 |  |  
| Licensed technology |  |  | 3 |  |  | $ | 1,865 |  |  | $ | 1,275 |  |  
| Less accumulated amortization |  |  |  |  |  |  | (844 | ) |  |  | (295 | ) |  
|  |  |  |  |  |  |   |   |  |  |   |   |  |  
|  |  |  |  |  |  | $ | 1,021 |  |  | $ | 980 |  |  
|  |  |  |  |  |  |   |   |  |  |   |   |  |  The following table presents future amortization of the Company's intangible assets at December 31, 2011:    
|  |  |  |  |  |  
|  |  | Amortization |  |  
| 2012 |  | $ | 746 |  |  
| 2013 |  |  | 275 |  |  
|  |  |   |   |  |  
| Total |  | $ | 1,021 |  |  
|  |  |   |   |  |  Deferred revenue and deferred profit consist of the following:    
|  |  |  |  |  |  |  |  |  |  
|  |  | December 31, |  |  
|  |  | 2011 |  |  | 2010 |  |  
| Deferred revenue—rebates |  | $ | 190 |  |  | $ | 492 |  |  
| Deferred revenue—distributor transactions |  |  | 5,606 |  |  |  | 6,535 |  |  
| Deferred cost of net revenue—distributor transactions |  |  | (1,767 | ) |  |  | (1,705 | ) |  
|  |  |   |   |  |  |   |   |  |  
|  |  | $ | 4,029 |  |  | $ | 5,322 |  |  
|  |  |   |   |  |  |   |   |  |  Accrued expenses consist of the following:    
|  |  |  |  |  |  |  |  |  |  
|  |  | December 31, |  |  
|  |  | 2011 |  |  | 2010 |  |  
| Accrued software license payments |  | $ | 214 |  |  | $ | 362 |  |  
| Accrued technology license payments |  |  | 2,794 |  |  |  | 25 |  |  
| Accrued professional fees |  |  | 203 |  |  |  | 236 |  |  
| Accrued price protection liability |  |  | 2,856 |  |  |  | 456 |  |  
| Estimated export compliance fines and penalties |  |  | 750 |  |  |  | — |  |  
| Other |  |  | 586 |  |  |  | 479 |  |  
|  |  |   |   |  |  |   |   |  |  
|  |  | $ | 7,403 |  |  | $ | 1,558 |  |  
|  |  |   |   |  |  |   |   |  |    Other long-term liabilities consist of the following:    
|  |  |  |  |  |  |  |  |  |  
|  |  | December 31, |  |  
|  |  | 2011 |  |  | 2010 |  |  
| Accrued technology license payments |  | $ | 371 |  |  | $ | — |  |  
| Deferred rent |  |  | 248 |  |  |  | 257 |  |  
| Other |  |  | 236 |  |  |  | — |  |  
|  |  |   |   |  |  |   |   |  |  
|  |  | $ | 855 |  |  | $ | 257 |  |  
|  |  |   |   |  |  |   |   |  |