Stockholders’ Equity - Warrants outstanding (Details)	3 Months Ended
	Mar. 31, 2021 $ / shares shares
Stockholders’ Equity
Warrants outstanding	88,556
MidCap Credit Facility | Warrants
Stockholders’ Equity
Warrants outstanding	8,379
warrants exercise price | $ / shares	$ 28.65
Expiration dates	2028
Notes payable | Warrants
Stockholders’ Equity
Warrants outstanding	15,712
warrants exercise price | $ / shares	$ 28.65
Expiration dates	2027
Convertible promissory notes | Warrants
Stockholders’ Equity
Warrants outstanding	64,465
warrants exercise price | $ / shares	$ 28.65
Expiration dates	2027