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Related parties - Additional Information (Details) - USD ($)		12 Months Ended
	Dec. 30, 2022	Dec. 31, 2021	Dec. 31, 2020
Subscription Agreement [Member] \| Series A Preferred Stock [Member] \| Rubric Capital Management LP [Member]
Related Party Transaction [Line Items]
Redeemed outstanding shares	29,000
Purchase price per share	$ 1,333
Redemption purchase price	$ 3,000,000.0
Catalent [Member]
Related Party Transaction [Line Items]
Amount billed		$ 4,100,000	$ 3,000,000.0
Estimated amounts payable to related party		900,000
American International Group [Member]
Related Party Transaction [Line Items]
Amount billed		100,000	$ 200,000
Estimated amounts payable to related party		$ 0