Equity - Summary of Common Stock Warrant activity (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Class Of Stock [Line Items]
Number of Common Stock Warrants Outstanding, Beginning Balance		57,420
Number of Common Stock Warrants, Expired	(208)	(208)
Number of Common Stock Warrants Outstanding, Ending Balance			57,420
Weighted-Average Exercise Price Outstanding, Beginning Balance		$ 7.95
Weighted Average Exercise Price, Expired	$ 192.00	$ 96.00
Weighted-Average Exercise Price Outstanding, Ending Balance			$ 7.95
Weighted-Average Remaining Contractual Term, Outstanding			4 years 9 months 29 days
Warrant | Equity and Debt Fundraising Events
Class Of Stock [Line Items]
Number of Common Stock Warrants Outstanding, Beginning Balance	412,262	26,823
Number of Common Stock Warrants, Granted	1,648,707	1,099,536
Number of Common Stock Warrants, Exercised	(1,648,707)	(710,211)
Number of Common Stock Warrants, Expired		(3,886)
Number of Common Stock Warrants Outstanding, Ending Balance	412,262	412,262	26,823
Weighted-Average Exercise Price Outstanding, Beginning Balance	$ 9.60	$ 102.74
Weighted Average Exercise Price, Granted	0.01	1.40
Weighted Average Exercise Price, Exercised	(0.01)	0.01
Weighted Average Exercise Price, Expired		64.32
Weighted-Average Exercise Price Outstanding, Ending Balance	$ 9.81	$ 9.60	$ 102.74
Weighted-Average Remaining Contractual Term, Outstanding	5 years 8 months 15 days	6 years 8 months 15 days	9 years 2 months 1 day
Aggregate Intrinsic Value Outstanding	$ 723	$ 1,380