Nature of the Business (Narrative) (Details) $ / shares in Units, $ in Thousands				3 Months Ended
	Nov. 18, 2021 $ / shares shares	Nov. 15, 2021 $ / shares shares	Oct. 29, 2021	Mar. 31, 2022 USD ($) shares	Mar. 31, 2021 USD ($)	Dec. 31, 2021 USD ($) shares
Nature of Business Disclosures [Line Items]
Proceeds from issuance of simple agreement for future equity					$ 2,900
Proceeds from issuance of convertible notes payable with related parties					2,000
Repayment of convertible notes					2,000
Cash and cash equivalents				$ 124,766		$ 144,885
Net Income Loss				(18,263)	$ (32,021)
Accumulated deficit				$ (247,744)		$ (229,481)
Reverse stock split	1.556		1.556
Class A Common Stock [Member]
Nature of Business Disclosures [Line Items]
Issuance of stock, shares | shares		6,000,000
Share Price | $ / shares		$ 13.00
Underwriters [Member]
Nature of Business Disclosures [Line Items]
Issuance of stock, shares | shares	900,000
Underwriters [Member] | Class A Common Stock [Member]
Nature of Business Disclosures [Line Items]
Issuance of stock, shares | shares	537,711
Share Price | $ / shares	$ 71.1
UNS. [Member]
Nature of Business Disclosures [Line Items]
Note conversion ratio				3.4233
COVAXX [Member]
Nature of Business Disclosures [Line Items]
Note conversion ratio				0.2191
ConvertiblePreferredStockSharesIssuedUponConversion | shares						3.4233
Debt Conversion Converted Instrument Shares Issued 1 | shares				4,047,344