Stock-Based Compensation - Summary of Common Stock Warrant Activity (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
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
Number of Common Stock Warrants Outstanding and Exercisable, Ending Balance	57,004	57,212
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 Exercise Price Outstanding and Exercisable, Ending Balance	$ 6.94	$ 7.62
Weighted-Average Remaining Contractual Term Outstanding			4 years 9 months 29 days
Weighted-Average Remaining Contractual Term Outstanding and Exercisable	2 years 10 months 28 days	3 years 7 months 20 days
Aggregate Intrinsic Value Outstanding and Exercisable	$ 2,260	$ 98,000