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The Company (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Accounting Policies [Abstract]    
Accrual at beginning of year $ 330 $ 529
Additions charged to warranty expense 61 79
Expiring warranties (135) (22)
Claims satisfied (93) (206)
Total $ 163 $ 380