Organization and Description of Business - Additional Information (Detail)		6 Months Ended
	Jun. 16, 2021	Sep. 30, 2021
Class Of Stock [Line Items]
Stock split description	Each share of Class B common stock is convertible into one share of Class A common stock any time at the option of the holder and is automatically converted into one share of Class A common stock upon transfer	The shares and net loss per common share prior to the Merger have been retroactively restated as shares reflecting the exchange ratio established in the Merger (each outstanding share of 23andMe, Inc. Class A common stock was exchanged for 2.293698169 shares of the Company’s Class A common stock, and each outstanding share of 23andMe, Inc. Class B common stock, including all shares of 23andMe, Inc. preferred stock (which were converted to shares of 23andMe, Inc. Class B common stock immediately prior to the Merger), was exchanged for 2.293698169 shares of the Company’s Class B common stock).
Class A Common Stock [Member]
Class Of Stock [Line Items]
Exchange Ratio	2.293698169	2.293698169
Class B Common Stock [Member]
Class Of Stock [Line Items]
Exchange Ratio	2.293698169	2.293698169