Cash and Cash Equivalents and Investments (Tables)

3 Months Ended

Mar. 31, 2022

Cash and Cash Equivalents and Investments [Abstract]

Schedule of Cash, Cash Equivalents and Short-term Investments [Table Text Block]

	As of March 31, 2022
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
	(in thousands)
Cash and cash equivalents	$	59,520	$	—	$	—	$	59,520
Securities maturing within one year:
U.S. treasury securities	12,486		—		(26)		12,460
Corporate debt securities	14,533		4		(15)		14,522
Total short-term investments	$	27,019	$	4	$	(41)	$	26,982
Total cash and cash equivalents and investments	$	86,539	$	4	$	(41)	$	86,502
	As of December 31, 2021
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
			(in thousands)
Cash and cash equivalents	$	64,066	$	—	$	(1)	$	64,065
Securities maturing within one year:
U.S. treasury securities	7,562		—		(1)		7,561
Corporate debt securities	15,125		—		(8)		15,117
Total short-term investments	$	22,687	$	—	$	(9)	$	22,678
Total cash and cash equivalents and investments	$	86,753	$	—	$	(10)	$	86,743