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California Institute For Regenerative Medicine Award (Details) $ in Millions		6 Months Ended	12 Months Ended
	Apr. 05, 2018 USD ($) Disbursement	Jun. 30, 2022 USD ($)	Dec. 31, 2020
Award from California institute for regenerative medicine
Period to treat award as grant, if award not treated as loan			10 years
California Institute for Regenerative Medicine
Award from California institute for regenerative medicine
Receipt of first disbursement under the Award \| $		$ 4.0
California Institute for Regenerative Medicine \| LIBOR
Award from California institute for regenerative medicine
Award considered as a loan, interest rate	7.00%
California Institute for Regenerative Medicine \| Loan Repayment Rate One
Award from California institute for regenerative medicine
Repayment percentage of award amount	60.00%
California Institute for Regenerative Medicine \| Loan Repayment Rate Two
Award from California institute for regenerative medicine
Repayment percentage of award amount	80.00%
California Institute for Regenerative Medicine \| Loan Repayment Rate Three
Award from California institute for regenerative medicine
Repayment percentage of award amount	100.00%
California Institute for Regenerative Medicine \| Loan Repayment Rate Four
Award from California institute for regenerative medicine
Repayment percentage of award amount	100.00%
California Institute for Regenerative Medicine \| FT516
Award from California institute for regenerative medicine
Award agreement executed date	Apr. 05, 2018
Award for first-in-human clinical trial \| $	$ 4.0
Number of disbursements \| Disbursement	5
Number of disbursement receivable upon the execution of the award \| Disbursement	1
Number of disbursements receivable based on completion of certain operating milestones \| Disbursement	4
Additional amount available for funding under award \| $	$ 4.0