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Description of Business and Basis of Financial Statements (Details) $ in Thousands	107 Months Ended
	Mar. 31, 2023 USD ($) employee lease	Dec. 31, 2022 USD ($)	Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Subsequent Event [Line Items]
Number of employees | employee	73
Number Of Development Programs | lease	3
Accumulated deficit	$ (342,552)	$ (317,280)
Proceeds from issuance of private placement	355,600
Cash, cash equivalents and restricted cash	92,761	106,745	$ 95,710	$ 86,863
Investments - other	$ 4,351	$ 9,629

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