Net Loss per Share - Anti-dilutive shares (Details) - shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	4,834,022	3,492,921
Warrants to purchase common stock
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	2,501,419	1,893,201
Options to purchase common stock
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	2,332,603	1,599,720