Accrued Warranty (Tables)

12 Months Ended

Dec. 31, 2021

Product Warranties Disclosures [Abstract]

Schedule Product Warranty Accrual Included in Accrued Expenses

Activity in the product warranty accrual is included in accrued expenses and consisted of the following (in thousands):

	Year Ended December 31,
	2021			2020
Balance at beginning of year	$	204		$	234
Claims satisfied		(9	)		(53	)
Increase in warranty accrual		—			19
Change in liability for pre-existing warranties		—			4
Balance at end of year	$	195		$	204