Summary of Significant Accounting Policies - Equity at the Market Offering, Income Taxes, Inventory and Property and Equipment (Details) - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Accounting Policies [Abstract]
CARES Act, cash benefits for the fiscal year 2020	$ 6,800,000
Inventory write-down	$ 0	$ 0
Minimum
Property, Plant and Equipment [Abstract]
Property and equipment, useful life	2 years
Maximum
Property, Plant and Equipment [Abstract]
Property and equipment, useful life	39 years