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Warranty Reserves - Schedule of Product Warranty Liability (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Extended Product Warranty Disclosure [Abstract]        
Warranty accrual at beginning of period $ 449 $ 457 $ 521 $ 645
Charged to expense 18 144 83 319
Claims paid, net of recoveries (26) (20) (142) (392)
Foreign currency adjustment 8 3 (13) 12
Warranty accrual at end of period $ 449 $ 584 $ 449 $ 584