Investments - Cash, Cash Equivalents and Investments (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Cash and cash equivalents:
Amortized Cost	$ 39,442	$ 37,187
Gross unrealized gains	0	0
Gross unrealized losses	0	0
Fair Value	39,442	37,187
Investments:
Amortized Cost	145,723	102,740
Gross unrealized gains	0	0
Gross unrealized losses	(793)	(126)
Fair Value	144,930	102,614
Total cash, cash equivalents and investments, Amortized Cost	185,165	139,927
Total cash, cash equivalents and investments, Gross Unrealized Gains	0	0
Total cash, cash equivalents and investments, Gross Unrealized Losses	(793)	(126)
Total cash, cash equivalents and investments, fair value	184,372	139,801
Cash and cash equivalents
Cash and cash equivalents:
Amortized Cost	39,442	37,187
Gross unrealized gains	0	0
Gross unrealized losses	0	0
Fair Value	39,442	37,187
Certificates of deposit (due within 1 year)
Investments:
Amortized Cost	8,700	9,047
Gross unrealized gains	0	0
Gross unrealized losses	(22)	(9)
Fair Value	8,678	9,038
Commercial paper (due within 1 year)
Investments:
Amortized Cost	47,762	50,975
Gross unrealized gains	0	0
Gross unrealized losses	(284)	(55)
Fair Value	47,478	50,920
Corporate bonds (due within 1 year)
Investments:
Amortized Cost	36,320	42,718
Gross unrealized gains	0	0
Gross unrealized losses	(280)	(62)
Fair Value	36,040	$ 42,656
U.S. Government and government agencies (due within 1 year)
Investments:
Amortized Cost	52,941
Gross unrealized gains	0
Gross unrealized losses	(207)
Fair Value	$ 52,734

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