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THE COMPANY AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES: (Product warranty) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Dec. 31, 2016
Changes in the entity's liability for product warranty      
Product warranty liability, beginning of period $ 1,474 $ 1,641  
Assumed warranty liability from acquisition 0 290  
New warranties issued during the period 436 369  
Reversal of warranty reserves (356) (134)  
Settlements during the period (343) (348)  
Product warranty liability, end of period 1,211 1,818  
Less: long-term portion of product warranty liability (162) (386)  
Current portion, end of the period $ 1,049 $ 1,432 $ 1,263