Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2019	Dec. 31, 2020	Feb. 28, 2019
Income Taxes [Line Items]
Net operating loss carryforwards, federal	$ 101,900
Net operating loss carryforwards, state	12,400
Deferred tax liability	$ 23,039		$ 22,870
Deferred income tax		$ (7,547)
Cobalt Biomedicine Inc
Income Taxes [Line Items]
Deferred tax liability				$ 7,500
Deferred income tax		$ 7,500
State
Income Taxes [Line Items]
Net tax operating losses, expiration	begin to expire in 2038
Tax credit carryforward, expiration	begin to expire in 2038
Research tax credits	$ 6,500
Federal
Income Taxes [Line Items]
Research tax credits	$ 17,500