XML 41 R29.htm IDEA: XBRL DOCUMENT v3.7.0.1
Balance Sheet Components (Liability for Warranty Returns) (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Movement in Standard Product Warranty Accrual [Roll Forward]    
Balance at beginning of period $ 28 $ 49
Provision (benefit) 10 (4)
Charge-offs (5) (18)
Balance at end of period $ 33 $ 27