SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Allowance for doubtful accounts
Schedule of Valuation and Qualifying Accounts [Roll Forward]
Balance at Beginning of Year	$ 817	$ 708
Additions Charged to Costs and Expenses	246	208
Additions Charged to other Accounts	0	0
Deductions	(76)	(99)
Balance at End of Year	987	817
Allowance for obsolete inventories
Schedule of Valuation and Qualifying Accounts [Roll Forward]
Balance at Beginning of Year	471	874
Additions Charged to Costs and Expenses	638	506
Additions Charged to other Accounts	0	0
Deductions	(662)	(909)
Balance at End of Year	447	471
Valuation allowance for deferred tax assets
Schedule of Valuation and Qualifying Accounts [Roll Forward]
Balance at Beginning of Year	11,933	12,375
Additions Charged to Costs and Expenses	(3,999)	(442)
Additions Charged to other Accounts	0	0
Deductions	0	0
Balance at End of Year	7,934	11,933
Reserve for sales returns
Schedule of Valuation and Qualifying Accounts [Roll Forward]
Balance at Beginning of Year	71	68
Additions Charged to Costs and Expenses	767	1,033
Additions Charged to other Accounts	0	0
Deductions	(783)	(1,030)
Balance at End of Year	$ 55	$ 71