Revenue Recognition (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		6 Months Ended
	Apr. 30, 2022	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Disaggregation of Revenue [Line Items]
Total revenue		$ 23,003		$ 27,793	$ 1,935
License and Milestone Fees
Disaggregation of Revenue [Line Items]
Total revenue		15,000		15,000	1,192
Collaborative Revenue
Disaggregation of Revenue [Line Items]
Total revenue		8,003		8,003	706
Commercial Supply Revenue
Disaggregation of Revenue [Line Items]
Total revenue				4,790
Clinical Compound Revenue
Disaggregation of Revenue [Line Items]
Total revenue					37
Vifor [Member] | License and Milestone Fees
Disaggregation of Revenue [Line Items]
Total revenue		15,000		15,000
Vifor [Member] | Commercial Supply Revenue
Disaggregation of Revenue [Line Items]
Total revenue				4,790
Vifor Profit Sharing [Member] | Collaborative Revenue
Disaggregation of Revenue [Line Items]
Total revenue		8,003		8,003
Vifor Agreement No 2 [Member] | License and Milestone Fees
Disaggregation of Revenue [Line Items]
Total revenue	$ 15,000
Maruishi Agreement [Member] | License and Milestone Fees
Disaggregation of Revenue [Line Items]
Total revenue		0	$ 0	0	1,192
Maruishi Agreement [Member] | Collaborative Revenue
Disaggregation of Revenue [Line Items]
Total revenue		$ 0	$ 0	$ 0	706
Maruishi Agreement [Member] | Clinical Compound Revenue
Disaggregation of Revenue [Line Items]
Total revenue					$ 37