Facility Lease - Additional information (Details) $ in Thousands	1 Months Ended	3 Months Ended	9 Months Ended
Aug. 31, 2021 ft²	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)
Facility Lease
Area of property subleased \| ft²	7,585
Sublease income - related party \| $		$ 147	$ 94	$ 439	$ 94

Amount of sublease income in connection with related party transactions.

No definition available.

Name:	crvs_SubleaseIncomeRelatedParty
Namespace Prefix:	crvs_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration