Related Party Transactions (Details) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2023 USD ($) Milestone item Program	Dec. 31, 2022 USD ($)
Related Party Transactions
Percentage of margin	15.00%
Number of milestones completed	2
Amount recognized and expensed related to Current cash component	$ 1.0
Number of shares issuable for the accrued milestone	3.0
Fair value of debt converted	2.1
Stock-based compensation related to the achieved milestone	0.5	$ 1.6
Stock based compensation recognized and expensed but not yet paid	0.5
Amount related to future cash milestone payments anticipated to achieve and earn	0.2
Fair value of future shares milestone payments anticipate to achieve and earn	$ 0.1
Advent Bio services agreement
Related Party Transactions
Number of operational programs | Program	3
Number of sets of one-time milestones | Milestone	10
Number of required licenses for the Sawston facility | item	3