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Related Party Transactions (Details) - USD ($) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2022 | Mar. 31, 2021 | Dec. 31, 2021
China Joint Venture |  |  |
Related Party Transaction [Line Items] |  |  |
Joint venture ownership | 80.00% | 80.00% |
China Joint Venture | Fosun Pharma Member |  |  |
Related Party Transaction [Line Items] |  |  |
Joint venture ownership, noncontrolling party | 20.00% | 20.00% |
China Joint Venture | Subsidiaries | Notes Receivable |  |  |
Related Party Transaction [Line Items] |  |  |
Related party transaction, amount | $ 0 | $ 0 |
NSP China | Subsidiaries |  |  |
Related Party Transaction [Line Items] |  |  |
Notes receivable, related parties, current | 0 |  | $ 1,200,000
NSP China | Subsidiaries | Company's Joint Venture Partner |  |  |
Related Party Transaction [Line Items] |  |  |
Notes receivable, related parties, current | $ 0 |  | $ 300,000
NSP China | Subsidiaries | Notes Receivable |  |  |
Related Party Transaction [Line Items] |  |  |
Related party transaction, rate | 3.00% |  |

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