Revenue - Additional Information (Details) - USD ($)	1 Months Ended	3 Months Ended
Feb. 28, 2018	Mar. 31, 2021	Mar. 31, 2020
Disaggregation of Revenue [Line Items]
Revenue		$ 0	$ 320,000
SBIR Grants
Disaggregation of Revenue [Line Items]
Grants from the National Institutes of Health	$ 2,800,000		2,800,000
Revenue		$ 0	$ 300,000

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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+ Details