| Balance Sheet Details | 
Balance Sheet Details Cash and cash equivalents and investments consist of the following: 
|  |  
|  |  |  |  |  |  |  |  |  
|   | March 31,2015
 |   | December 31, 2014
 |  
| Cash and cash equivalents | $ | 22,769 | 
 |   | $ | 20,696 | 
 |  
| Short-term investments | 42,173 | 
 |   | 48,399 | 
 |  
| Long-term investments | 16,332 | 
 |   | 10,256 | 
 |  
|   | $ | 81,274 | 
 |   | $ | 79,351 | 
 | 
 Inventory consists of the following: 
|  |  
|  |  |  |  |  |  |  |  |  
|   | March 31,2015
 |   | December 31, 2014
 |  
| Work-in-process | $ | 6,859 | 
 |   | $ | 4,169 | 
 |  
| Finished goods | 5,990 | 
 |   | 6,689 | 
 |  
|   | $ | 12,849 | 
 |   | $ | 10,858 | 
 | 
 Property and equipment consist of the following: 
|  |  
|  |  |  |  |  |  |  |  |  |  |  
|   | Useful Life (in Years) |   | March 31,2015
 |   | December 31, 2014
 |  
| Furniture and fixtures | 5 |   | $ | 757 | 
 |   | $ | 735 | 
 |  
| Machinery and equipment | 3 -5 |   | 12,864 | 
 |   | 12,695 | 
 |  
| Masks and production equipment | 2 |   | 8,672 | 
 |   | 8,672 | 
 |  
| Software | 3 |   | 1,193 | 
 |   | 905 | 
 |  
| Leasehold improvements | 4 -5 |   | 4,451 | 
 |   | 4,451 | 
 |  
| Construction in progress | N/A |   | 68 | 
 |   | 276 | 
 |  
|   |   |   | 28,005 | 
 |   | 27,734 | 
 |  
| Less accumulated depreciation and amortization |   |   | (16,741 | ) |   | (15,293 | ) |  
|   |   |   | $ | 11,264 | 
 |   | $ | 12,441 | 
 | 
 Intangible assets, net consist of the following: 
|  |  
|  |  |  |  |  |  |  |  |  |  |  
|   | Weighted Average Amortization Period (in Years) |   | March 31,2015
 |   | December 31, 2014
 |  
| Licensed technology | 3 |   | $ | 2,821 | 
 |   | $ | 2,821 | 
 |  
| Developed technology | 7 |   | 3,100 | 
 |   | 2,700 | 
 |  
| Less accumulated amortization |   |   | (2,630 | ) |   | (2,435 | ) |  
|   |   |   | 3,291 | 
 |   | 3,086 | 
 |  
| In-process research and development |   |   | 6,900 | 
 |   | 7,300 | 
 |  
|   |   |   | $ | 10,191 | 
 |   | $ | 10,386 | 
 | 
 
The following table presents future amortization of the Company’s intangible assets at March 31, 2015:
 
|  |  
|  |  |  |  |  
|   | Amortization |  
| 2015 | $ | 571 | 
 |  
| 2016 | 555 | 
 |  
| 2017 | 443 | 
 |  
| 2018 | 443 | 
 |  
| 2019 | 443 | 
 |  
| Thereafter | 836 | 
 |  
| Total | $ | 3,291 | 
 | 
 Deferred revenue and deferred profit consist of the following: 
|  |  
|  |  |  |  |  |  |  |  |  
|   | March 31,2015
 |   | December 31, 2014
 |  
| Deferred revenue—rebates | $ | 43 | 
 |   | $ | 21 | 
 |  
| Deferred revenue—distributor transactions | 5,512 | 
 |   | 5,585 | 
 |  
| Deferred cost of net revenue—distributor transactions | (1,922 | ) |   | (1,994 | ) |  
|   | $ | 3,633 | 
 |   | $ | 3,612 | 
 | 
 Accrued price protection liability consists of the following activity: 
|  |  
|  |  |  |  |  |  |  |  |  
|   | Three Months EndedMarch 31,
 |  
|   | 2015 |   | 2014 |  
| Beginning balance | $ | 10,018 | 
 |   | $ | 15,017 | 
 |  
| Charged as a reduction of revenue | 6,009 | 
 |   | 6,677 | 
 |  
| Reversal of unclaimed rebates | (12 | ) |   | (242 | ) |  
| Payments | (3,350 | ) |   | (7,072 | ) |  
| Ending balance | $ | 12,665 | 
 |   | $ | 14,380 | 
 | 
 Accrued expenses and other current liabilities consist of the following: 
|  |  
|  |  |  |  |  |  |  |  |  
|   | March 31,2015
 |   | December 31, 2014
 |  
| Accrued technology license payments | $ | 3,000 | 
 |   | $ | 3,000 | 
 |  
| Accrued professional fees | 2,623 | 
 |   | 422 | 
 |  
| Accrued litigation costs | 673 | 
 |   | 560 | 
 |  
| Other | 1,305 | 
 |   | 1,566 | 
 |  
|   | $ | 7,601 | 
 |   | $ | 5,548 | 
 |  |