Collaboration with Verily Life Sciences (Details) - Verily Life Sciences - Collaborative Arrangement - USD ($) $ / shares in Units, $ in Millions		3 Months Ended		12 Months Ended
	Nov. 20, 2018	Dec. 31, 2021	Mar. 31, 2018	Dec. 31, 2019	Mar. 31, 2022	Dec. 28, 2018
Collaborative Arrangement, Initial Payment
Other Commitments [Line Items]
Closing stock price (USD per share)						$ 118.28
Initial payment on collaborative agreement	$ 250.0
Issuance of common stock in connection with achievement of regulatory approval milestone, net of issuance costs (in shares)	1,840,943
Collaborative research and development fee		$ 87.1	$ 217.7
Collaborative Arrangement, Milestone Payments
Other Commitments [Line Items]
Collaborative research and development fee				$ 3.2
Potential future common stock issuable (shares)					1,288,660
Collaborative Arrangement, Approval Milestone
Other Commitments [Line Items]
Potential future common stock issuable (shares)					736,377