Summary of Significant Accounting Policies - Basis of Presentation (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Summary of Significant Accounting Policies
Net loss	$ (8,149)	$ (5,067)
Accumulated deficit	(113,240)		$ (105,091)
Cash used in operating activities	7,350	5,174
Cash used in financing activities	$ 869	$ 3,726