Balance Sheet Components (Other) (Details) - USD ($)
$ in Thousands
Sep. 30, 2015
Dec. 31, 2014
Other assets    
Prepaid licensing $ 1,062 $ 697
Deposits 563 632
Other assets total 1,625 1,329
Accrued liabilities    
Sales returns and warranty accruals 2,622 2,019
Compensation accruals 2,002 1,614
Other accrued liabilities 309 1,117
Total accrued liabilities $ 4,933 $ 4,750