Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2022

Fair Value Measurements [Abstract]

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

	Assets and Liabilities at Fair Value as of March 31, 2022
	Level 1		Level 2		Level 3		Total
	(in thousands)
Assets
Cash and cash equivalents	$	59,520	$	—	$	—	$	59,520
Short-term investments	12,460		14,522		—		26,982
Total cash and cash equivalents and investments	$	71,980	$	14,522	$	—	$	86,502

	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