Consolidated Statements of Redeemable Convertible Preferred Stock - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Jun. 30, 2021	Dec. 31, 2021	Dec. 31, 2020
Redeemable convertible preferred stock, carrying amount		$ 269,941	$ 269,941	$ 82,044
Redeemable convertible preferred stock, shares issued (in shares)		213,960,286	213,960,286	174,994,777
Conversion of redeemable convertible preferred stock to common stock in connection with reverse recapitalization upon Business Combination	$ (269,941)
Conversion of redeemable convertible preferred stock to common stock in connection with reverse recapitalization upon Business Combination (in shares)	(213,960,286)
Issuance of Series D and Series D plus redeemable convertible preferred stock, net of issuance costs, retroactive application of reverse recapitalization upon Business Combination		$ 187,897
Issuance of Series D and Series D plus redeemable convertible preferred stock, net of issuance costs, retroactive application of reverse recapitalization upon Business Combination (in shares)		38,965,509
Previously Reported [Member]
Redeemable convertible preferred stock, carrying amount			$ 269,941	$ 82,044
Redeemable convertible preferred stock, shares issued (in shares)			36,064,095	29,496,153
Revision of Prior Period, Adjustment [Member]
Redeemable convertible preferred stock, shares issued (in shares)			177,896,191	145,498,624