Net Loss per Share - Anti-dilutive shares (Details) - shares	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	4,977,905	3,578,095
Warrants to purchase common stock
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	1,888,622	2,043,201
Options to purchase common stock
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	2,402,603	1,534,894
Series E Convertible Preferred stock
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	686,680