The Company, Accrued Warranty Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Product Warranty Accrual [Roll Forward]
Accrual at beginning of period	$ 232	$ 238
Additions charged to warranty expense	67	222
Expiring warranties/claims satisfied	(186)	(228)
Total	113	232
Less: current portion	(87)	(170)
Total long-term accrued warranty costs	$ 26	$ 62
Minimum [Member]
Product Warranty Liability [Line Items]
Standard warranty period	1 year
Offered warranty period	3 years
Maximum [Member]
Product Warranty Liability [Line Items]
Standard warranty period	2 years
Offered warranty period	4 years