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Accrued Warranty - Schedule Product Warranty Accrual Included in Accrued Expenses (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Product Warranties Disclosures [Abstract]    
Balance at beginning of period, Accrued warranty $ 112 $ 87
Increase in warranty accrual 889 287
Change in liability for pre-existing warranties (28)  
Claims satisfied (635) (262)
Balance at ending of period, Accrued warranty $ 338 $ 112