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Warranties (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Product Warranty Liability [Line Items]    
Beginning balance $ 656 $ 858
Warranty provisions 100 103
Warranty claims (69) (25)
Adjustments to preexisting warranties (240) (231)
Currency (3) (7)
Ending balance $ 444 $ 698
Minimum [Member]    
Product Warranty Liability [Line Items]    
Product Warranty Period 2 years  
Maximum [Member]    
Product Warranty Liability [Line Items]    
Product Warranty Period 5 years