Convertible Instruments and Equity (Details) $ / shares in Units, $ in Thousands				6 Months Ended	12 Months Ended
	Mar. 31, 2022 $ / shares shares	Dec. 30, 2021 $ / shares shares	Dec. 29, 2021 shares	Jun. 30, 2021 USD ($)	Dec. 31, 2021 USD ($) d $ / shares shares	Dec. 31, 2020 USD ($) $ / shares shares
Class of Warrant or Right [Line Items]
Temporary equity, shares authorized					10,000,000	121,348,911
Temporary equity, par value (in dollars per share) | $ / shares					$ 0.0001	$ 0.0001
Temporary equity, shares issued					0
Common stock, par value (in dollars per share) | $ / shares		$ 0.0001			$ 0.0001	$ 0.0001
Common stock, shares authorized					500,000,000	320,000,000
Common stock, shares issued					183,367,037	8,160,828
Common stock, shares outstanding		183,367,000			183,367,037	8,160,828
Proceeds from SAFE instruments | $					$ 83,411	$ 0
Public Warrants
Class of Warrant or Right [Line Items]
Redemption price per warrant (in dollars per share) | $ / shares					$ 0.01
Stock price trigger for redemption of warrants (in dollars per share) | $ / shares					$ 18.00
Threshold trading days for redemption of warrants | d					20
Threshold consecutive trading days for redemption of warrants | d					30
Number of securities called by warrants (in shares)		8,600,000
Warrants, exercise price (in dollars per share) | $ / shares					$ 1.70
Private Warrants
Class of Warrant or Right [Line Items]
Redemption price per warrant (in dollars per share) | $ / shares					0.10
Stock price trigger for redemption of warrants (in dollars per share) | $ / shares					$ 10.00
Subsequent event | Warrant Shares
Class of Warrant or Right [Line Items]
Number of securities called by warrants (in shares)	4,560,000
Warrants, exercise price (in dollars per share) | $ / shares	$ 0.01
Shares issued for stock warrants exercised (in shares)	1,800,000
SAFE Instruments
Class of Warrant or Right [Line Items]
Proceeds from SAFE instruments | $				$ 83,400
Common stock
Class of Warrant or Right [Line Items]
Stock conversion (in shares)						2
Shares issued for stock warrants exercised (in shares)					199,315
Conversion of preferred stock to common stock | Class A common stock
Class of Warrant or Right [Line Items]
Stock conversion (in shares)			121,038,967
Conversion of preferred stock to common stock | Legacy capital stock
Class of Warrant or Right [Line Items]
Stock conversion (in shares)			60,120,423
Conversion of preferred stock to common stock | Common stock
Class of Warrant or Right [Line Items]
Stock conversion (in shares)					121,038,967
Conversion of stock warrants to common stock | Legacy capital stock
Class of Warrant or Right [Line Items]
Stock conversion (in shares)		289,333
Conversion of stock warrants to common stock | Common stock
Class of Warrant or Right [Line Items]
Stock conversion (in shares)		582,509			582,509
Conversion of SAFE instruments to common stock | Legacy capital stock | SAFE Instruments
Class of Warrant or Right [Line Items]
Stock conversion (in shares)		9,973,979
Conversion of SAFE instruments to common stock | Common stock
Class of Warrant or Right [Line Items]
Stock conversion (in shares)					20,080,464
Conversion of SAFE instruments to common stock | Common stock | SAFE Instruments
Class of Warrant or Right [Line Items]
Stock conversion (in shares)		20,080,464