Organization (Details) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2022 USD ($) product	Jun. 30, 2022 USD ($)	Mar. 31, 2022 USD ($)	Sep. 30, 2021 USD ($)	Jun. 30, 2021 USD ($)	Mar. 31, 2021 USD ($)	Sep. 30, 2022 USD ($) segment product	Sep. 30, 2021 USD ($)	Dec. 31, 2021 USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of therapy products | product	2						2
Number of reportable segments | segment							1
Accumulated deficit	$ 405,917						$ 405,917		$ 383,286
Net loss	6,577	$ 8,963	$ 7,091	$ 4,931	$ 3,786	$ 3,289	22,631	$ 12,006
Cash and cash equivalents	65,216			$ 54,553			65,216	$ 54,553	$ 68,330
Short term investments	$ 67,500						$ 67,500