Quarterly report pursuant to Section 13 or 15(d)

Accrued Warranty - Schedule Product Warranty Accrual Included in Accrued Expenses (Details)

v3.20.2
Accrued Warranty - Schedule Product Warranty Accrual Included in Accrued Expenses (Details) - USD ($)
$ in Thousands
6 Months Ended 12 Months Ended
Jun. 30, 2020
Dec. 31, 2019
Product Warranties Disclosures [Abstract]    
Balance at beginning of period, Accrued warranty $ 338 $ 112
Increase in warranty accrual 40 889
Change in liability for pre-existing warranties   (28)
Claims satisfied (127) (635)
Balance at ending of period, Accrued warranty $ 251 $ 338