Cash and Cash Equivalents and Investments (Tables)

6 Months Ended

Jun. 30, 2022

Cash and Cash Equivalents and Investments [Abstract]

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

	As of June 30, 2022
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
	(in thousands)
Cash and cash equivalents	$	21,450	$	—	$	—	$	21,450
Securities maturing within one year:
U.S. treasury securities	30,419		—		(89)		30,330
Corporate debt securities	10,249		—		(61)		10,188
Total short-term investments	$	40,668	$	—	$	(150)	$	40,518
Total cash and cash equivalents and investments	$	62,118	$	—	$	(150)	$	61,968
	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