Schedule II - Valuation and Qualifying Accounts (Tables)

12 Months Ended

Dec. 31, 2021

Notes Tables

Valuation Allowances and Reserves [Table Text Block]

	Years Ended December 31,
	2021			2020
	(in thousands)
Allowance for bad debts:
Beginning balance	$	342		$	546
Adjustments		(228	)		470
Write-offs		(40	)		(674	)
Ending balance	$	74		$	342
Allowance for customer credits:
Beginning balance	$	64		$	194
Adjustments		31			(26	)
Write-offs		(68	)		(104	)
Ending balance	$	27		$	64
Tax valuation allowance:
Beginning balance	$	30,447		$	31,168
Charged (credited) to tax expense		1,532			(721	)
Charged (credited) to retained earnings		—			—
Ending balance	$	31,979		$	30,447