Accrued product warranty liability (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Accrued product warranty liability [Roll Forward]
Balance, beginning of period	$ 101	$ 140
Warranties issued	40	39
Warranty settlements	(64)	(70)
Balance, end of period	77	$ 109
Accrued product warranty liability, current	57
Other Liabilities [Member]
Accrued product warranty liability [Roll Forward]
Accrued product warranty liability, non-current	$ 20
Maximum [Member]
Warranty [Abstract]
Product warranty period	24 months