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Description of Business, Organization and Liquidity - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Description Of Business Organization And Liquidity [Line Items]
Accumulated deficit	$ 117,705		$ 104,360
Net loss	(13,345)	$ (5,674)
Cash, cash equivalents and marketable securities	148,900
Cash and cash equivalents	74,253	42,779	163,582
Current assets	116,902		169,295
Current liabilities	5,540		$ 5,566
Clinical Development and Corporate General and Administrative Activities
Description Of Business Organization And Liquidity [Line Items]
Net loss	$ (14,200)	$ (8,000)

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