Quarterly report pursuant to Section 13 or 15(d)

Related Party Transactions (Details)

v3.21.1
Related Party Transactions (Details) - USD ($)
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2020
China Joint Venture      
Related Party Transaction [Line Items]      
Joint venture ownership 80.00% 80.00%  
Fosun Pharma | China Joint Venture      
Related Party Transaction [Line Items]      
Joint venture ownership, noncontrolling party 20.00% 20.00%  
NSP China | Subsidiaries | Notes Receivable      
Related Party Transaction [Line Items]      
Related party transaction, rate 3.00%    
China Joint Venture | Subsidiaries | Notes Receivable      
Related Party Transaction [Line Items]      
Amount of related party transaction $ 0 $ 0  
Due from related parties 4,900,000   $ 4,800,000
China Joint Venture | Subsidiaries | Notes Receivable | Fosun Pharma      
Related Party Transaction [Line Items]      
Due from related parties $ 1,200,000   $ 1,200,000