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Revenue Recognition - Additional Information (Detail) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2024 | Mar. 31, 2023 | Dec. 31, 2023
Collaboration Arrangement [Line Items] |  |  |
Accounts receivable, net - related party | $ 1,718 |  | $ 2,765
Total revenue | 2,135 | $ 6,165 |
Other receivables | 506 |  | 555
Commercial supply revenue |  |  |
Collaboration Arrangement [Line Items] |  |  |
Total revenue | 640 | 3,191 |
Royalty revenue |  |  |
Collaboration Arrangement [Line Items] |  |  |
Total revenue |  | 125 |
Collaborative revenue |  |  |
Collaboration Arrangement [Line Items] |  |  |
Total revenue | 788 | 2,750 |
Clinical compound revenue |  |  |
Collaboration Arrangement [Line Items] |  |  |
Total revenue | 84 | 99 |
Other revenue (non-cash) |  |  |
Collaboration Arrangement [Line Items] |  |  |
Total revenue | 623 | 0 |
CSL Vifor, Maruishi and CKDP Agreements [Member] |  |  |
Collaboration Arrangement [Line Items] |  |  |
Other contract Assets | 0 |  | 0
Other contract liabilities | 0 |  | 0
Maruishi Agreement [Member] |  |  |
Collaboration Arrangement [Line Items] |  |  |
Other receivables | 346 |  | 415
Maruishi Agreement [Member] | Clinical compound revenue |  |  |
Collaboration Arrangement [Line Items] |  |  |
Total revenue | 84 | 99 |
Maruishi Agreement [Member] | Other revenue (non-cash) |  |  |
Collaboration Arrangement [Line Items] |  |  |
Total revenue | 333 |  |
Affiliated Entity [Member] | CSL Vifor |  |  |
Collaboration Arrangement [Line Items] |  |  |
Accounts receivable, net - related party | 1,718 |  | $ 2,765
Affiliated Entity [Member] | CSL Vifor | CSL Vifor Profit Sharing | Collaborative revenue |  |  |
Collaboration Arrangement [Line Items] |  |  |
Total revenue | 788 | 2,750 |
Affiliated Entity [Member] | CSL Vifor | CSL Vifor Korsuva [Member] | Commercial supply revenue |  |  |
Collaboration Arrangement [Line Items] |  |  |
Total revenue | 640 | 3,191 |
Affiliated Entity [Member] | CSL Vifor | CSL Vifor Korsuva [Member] | Commercial Supply Revenue With Associated Costs Of Goods Sold [Member] |  |  |
Collaboration Arrangement [Line Items] |  |  |
Cost of goods sold | 620 | 2,590 |
Affiliated Entity [Member] | CSL Vifor | CSL Vifor Kapruvia [Member] | Royalty revenue |  |  |
Collaboration Arrangement [Line Items] |  |  |
Total revenue | 0 | $ 125 |
Affiliated Entity [Member] | CSL Vifor | CSL Vifor Kapruvia [Member] | Other revenue (non-cash) |  |  |
Collaboration Arrangement [Line Items] |  |  |
Total revenue | $ 290 |  |

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