Quarterly report pursuant to Section 13 or 15(d)

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

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Accrued Warranty - Schedule of Warranty Accrual Included in Accrued Expenses (Details) - USD ($)
$ in Thousands
9 Months Ended 12 Months Ended
Sep. 30, 2021
Dec. 31, 2020
Product Warranties Disclosures [Abstract]    
Balance at beginning of period, Accrued warranty $ 204 $ 234
Increase in warranty accrual   19
Change in liability for pre-existing warranties   4
Claims satisfied (9) (53)
Balance at ending of period, Accrued warranty $ 195 $ 204