Balance Sheet Components (Other assets and Accrued liabilities) (Details) - USD ($) $ in Thousands |
Dec. 31, 2016 |
Dec. 31, 2015 |
|---|---|---|
| Other assets | ||
| Deposits | $ 656 | $ 933 |
| Prepaid licensing | 417 | 664 |
| Deferred tax asset | 935 | |
| Other | 53 | |
| Other assets total | 2,008 | 1,650 |
| Accrued liabilities | ||
| Sales returns and current portion of warranty accruals | 2,892 | 2,508 |
| Compensation accruals | 4,445 | 2,331 |
| Other accrued liabilities | 1,575 | 1,041 |
| Total accrued liabilities | $ 8,912 | $ 5,880 |