Organization and Description of Business - Additional Information (Details)	6 Months Ended
	Jun. 30, 2022 USD ($) segment	Dec. 31, 2021 USD ($)	Jan. 31, 2020 USD ($)
Organization and Description of Business [Line Item]
Accumulated deficit	$ (419,600,000)	$ (391,794,000)
Cash and cash equivalents	7,804,000	$ 41,800,000
Working capital	(13,100,000)
Aggregate offering price	200,000,000
Aggregate offering price			$ 200,000,000
Aggregate offering price, remaining	$ 130,600,000
Reportable segment | segment	1
SFJ Pharmaceuticals X, Ltd.
Organization and Description of Business [Line Item]
Proceeds from partnership contribution	$ 21,000,000
Equity Distribution Agreement with Citigroup Global Markets Inc. and William Blair & Company, L.L.C.
Organization and Description of Business [Line Item]
Aggregate offering price	60,000,000
Aggregate offering price			$ 60,000,000
Aggregate offering price, remaining	$ 55,000,000