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Equity Method Investment (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended		12 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Schedule of Equity Method Investments [Line Items]
Loss from equity method investment	$ 865			$ 2,730			$ 3,880	$ 5,367
Net loss	$ (6,000)	$ (6,503)	$ (7,873)	(14,831)	$ (8,363)	$ (8,297)	$ (20,376)	(31,491)
Angel Pharmaceuticals
Schedule of Equity Method Investments [Line Items]
Ownership interest (as percent)	49.70%						49.70%		49.70%
Equity reserved (as percent)							7.00%		7.00%
Loss from equity method investment							$ 900		$ (3,900)
Net loss	$ (1,016)			(3,204)			(4,565)	(6,402)
Share of loss from investments accounted for using the equity method	$ (865)			$ (2,730)			$ (3,880)	$ (5,367)

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