Recapitalization - Additional Information (Details) $ / shares in Units, $ in Thousands			6 Months Ended
	Jun. 16, 2021 USD ($) $ / shares shares	Feb. 04, 2021 $ / shares shares	Sep. 30, 2021 USD ($) $ / shares shares	Mar. 31, 2021 $ / shares shares
Business Acquisition [Line Items]
Proceeds From Issuance of Common Stock Reverse Recapitalization | $	$ 559,700
Reverse Recapitalization Percentage of Voting Interests Acquired	100.00%
Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs | $	$ 33,700		$ 33,726
Proceeds from issuance of common stock merger | $	$ 309,700
Restricted Stock Units [Member]
Business Acquisition [Line Items]
Shares conversion ratio	2.293698169
Founder shares [Member]
Business Acquisition [Line Items]
Shares restricted for transfer		12,713,750
Lock-up early release terms for the earn out shares, description		(i) one year after the Closing Date or (ii) the date following the completion of the Business Combination on which the Company completes a liquidation, merger, share exchange, or other similar transaction that results in all of the stockholders having the right to exchange their ordinary shares for cash, securities, or other property. Notwithstanding the foregoing, if the closing price of the Company's Class A common stock equals or exceeds $12.00 per share (as adjusted for share sub-divisions, share capitalizations, reorganizations, recapitalizations and the like) for any 20 trading days within any 30-trading-day period commencing at least 150 days after the Business Combination, 70% of the Founder Shares will be released from the lock-up.
Percent of share release from lockup		70.00%
VG Acquisition Sponsor LLC [Member]
Business Acquisition [Line Items]
Sponsor, Description		(i) with respect to 50% of the Earn-Out Shares, upon the closing price of the Company’s Class A common stock equaling or exceeding $12.50 per share for any 20 trading days within any 30-trading-day period and (ii) with respect to the other 50% of the Earn-Out Shares, upon the closing price of the Company’s Class A common stock equaling or exceeding $15.00 per share for any 20 trading days within any 30-trading-day period; provided that the transfer restrictions applicable to the Earn-Out Shares will terminate on the date following the closing date on which the Company completes a liquidation, merger, amalgamation, capital stock exchange, reorganization, or other similar transaction that results in all of the Company’s public stockholders having the right to exchange their shares of Class A common stock for cash, securities, or other property (a “Liquidation Event”), if such Liquidation Event occurs prior to the date that the stock price thresholds referenced in (i) and (ii) are met.
Earn-out shares, Percentage		50.00%
Lockup period for shares		7 years
PIPE [Member]
Business Acquisition [Line Items]
Proceeds from investment | $	$ 250,000
Class A Common Stock [Member]
Business Acquisition [Line Items]
Common Stock, Par value | $ / shares	$ 0.0001		$ 0.0001	$ 0.0001
Shares conversion ratio	2.293698169		2.293698169
Common Stock, Shares, Outstanding			93,409,227	20,713,076
Common Stock, Shares, Issued			93,409,227	20,713,076
Lock up for Class A common stock in connection with the Merger		180 days
Trading days		20 days
Number of trading days after commencing		30 days
Number of trading days after business combination		150 days
Class A Common Stock [Member] | Restricted Stock Units [Member]
Business Acquisition [Line Items]
Shares conversion ratio	2.293698169
Class A Common Stock [Member] | Founder shares [Member]
Business Acquisition [Line Items]
Share Price Thresholds Release From Lock Up | $ / shares		$ 12.00
Class A Common Stock [Member] | VG Acquisition Sponsor LLC [Member]
Business Acquisition [Line Items]
Common stock, Price Per Share | $ / shares		$ 10.00
Trading days		20 days
Number of trading days after commencing		30 days
Class A Common Stock [Member] | VG Acquisition Sponsor LLC [Member] | Minimum
Business Acquisition [Line Items]
Share Price Thresholds Release From Lock Up | $ / shares		$ 12.50
Class A Common Stock [Member] | VG Acquisition Sponsor LLC [Member] | Maximum
Business Acquisition [Line Items]
Share Price Thresholds Release From Lock Up | $ / shares		$ 15.00
Class A Common Stock [Member] | PIPE [Member]
Business Acquisition [Line Items]
Common Stock, Shares, Issued	25,000,000
Aggregate gross proceeds of common stock | $	$ 250,000
Class A Common Stock [Member] | PIPE [Member] | The Anne Wojcicki Foundation [Member]
Business Acquisition [Line Items]
Common Stock, Shares, Issued	2,500,000
Class B Common Stock [Member]
Business Acquisition [Line Items]
Common Stock, Par value | $ / shares	$ 0.0001		$ 0.0001	$ 0.0001
Acquired ownership percentage		30.00%
Shares conversion ratio	2.293698169		2.293698169
Common Stock, Shares, Outstanding			313,759,355	103,816,708
Common Stock, Shares, Issued			313,759,355	103,816,708
Class B Common Stock [Member] | Founder shares [Member]
Business Acquisition [Line Items]
Percentage Shares Restricted For Transfer		70.00%
Class B Common Stock [Member] | VG Acquisition Sponsor LLC [Member]
Business Acquisition [Line Items]
Common Stock, Shares, Outstanding		3,814,125