Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2022

Fair Value Measurements [Abstract]

Fair Value, by Balance Sheet Grouping [Table Text Block]

	Assets and Liabilities at Fair Value as of June 30, 2022
	Level 1		Level 2		Level 3		Total
	(in thousands)
Assets
Cash and cash equivalents	$	21,450	$	—	$	—	$	21,450
Short-term investments	30,330		10,188		—		40,518
Total cash and cash equivalents and investments	$	51,780	$	10,188	$	—	$	61,968

	Assets and Liabilities at Fair Value as of December 31, 2021
	Level 1		Level 2		Level 3		Total
	(in thousands)
Assets
Cash and cash equivalents	$	64,065	$	—	$	—	$	64,065
Short-term investments	7,561		15,117		—		22,678
Total cash and cash equivalents and investments	$	71,626	$	15,117	$	—	$	86,743