Summary of Significant Accounting Policies - Segment Information (Details)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2023 item	Sep. 30, 2022	Sep. 30, 2023 item segment	Sep. 30, 2022	Dec. 31, 2022 segment
Segment Information
Number of operating segments | segment			1		1
Other customers | Revenue | Customer concentration
Segment Information
Percentages of revenue recognized	0.00%	0.00%	0.00%	0.00%
Specialty distributors and pharmacy providers | Revenue | Customer concentration
Segment Information
Number of operating segments | item	4		4
Percentages of revenue recognized	93.00%		86.00%
Roche | Revenue | Customer concentration
Segment Information
Percentages of revenue recognized	7.00%	52.00%	7.00%	32.00%
Huadong | Revenue | Customer concentration
Segment Information
Percentages of revenue recognized				43.00%
Lilly | Revenue | Customer concentration
Segment Information
Percentages of revenue recognized	30.00%			20.00%
Novartis | Revenue | Customer concentration
Segment Information
Percentages of revenue recognized	18.00%
Vertex Pharmaceuticals Incorporated [Member] | Revenue | Customer concentration
Segment Information
Percentages of revenue recognized			6.00%