XML 63 R53.htm IDEA: XBRL DOCUMENT v3.19.2
Guarantees (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Guarantees [Abstract]    
Standard warranty period (in years) 1 year  
Movement in Standard Product Warranty Accrual [Roll Forward]    
Balance as of January 1, $ 1,798 $ 1,750
Provision for warranties 1,020 678
Claims made (696) (611)
Balance as of June 30, 2,122 1,817
Extended Product Warranty Disclosure [Abstract]    
Product extended warranty expense $ 2,800 $ 2,400