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Related Party Transactions and Balances - Additional Information (Details)
$ in Thousands
1 Months Ended 12 Months Ended
Jun. 30, 2019
USD ($)
Jun. 30, 2019
CNY (¥)
Jan. 01, 2019
Sep. 20, 2019
USD ($)
Sep. 20, 2019
CNY (¥)
Jun. 30, 2019
USD ($)
Jun. 30, 2019
CNY (¥)
Aug. 23, 2017
USD ($)
Aug. 23, 2017
CNY (¥)
Apr. 08, 2013
Dec. 31, 2012
USD ($)
Dec. 31, 2012
CNY (¥)
Sep. 30, 2010
USD ($)
Sep. 30, 2010
CNY (¥)
Aug. 12, 2010
USD ($)
Aug. 12, 2010
CNY (¥)
Jun. 30, 2007
USD ($)
Jun. 30, 2007
CNY (¥)
Aug. 12, 2004
CNY (¥)
Dec. 31, 2020
USD ($)
Loan
Dec. 31, 2019
USD ($)
Dec. 31, 2019
CNY (¥)
Dec. 31, 2018
USD ($)
Dec. 31, 2004
USD ($)
Agreement
Dec. 31, 2019
CNY (¥)
Related Party Transaction [Line Items]                                                  
Due to related parties                                       $ 12,285 $ 8,043        
Proceeds from related party debt                                       10,162 1,457   $ 0    
Interest expense, related party                                       $ 663 455   453    
Dalian Jin Gang Group                                                  
Related Party Transaction [Line Items]                                                  
Number of loans due to related party | Loan                                       4          
Due to related parties                                       $ 12,260          
Interest expense, related party                                       $ 663 455   453    
Frequency of periodic payment of interest                                       monthly          
Interest owed on loan from noncontrolling shareholder                                       $ 25 0        
Interests paid to noncontrolling shareholder                                       640 470   $ 438    
Related party transaction, lease term     5 years                                            
Related party transaction, operating lease annual rent                                         49       ¥ 300,000
Related party transaction, current and non-current lease liability                                       7,423          
Dalian Jin Gang Group | Operating Lease Agreement After Amendment                                                  
Related Party Transaction [Line Items]                                                  
Related party transaction, operating lease annual rent           $ 22 ¥ 200,000                                    
Related party transaction, lease term           5 years 6 months 5 years 6 months                                    
Dalian Jin Gang Group | Management Service Agreement                                                  
Related Party Transaction [Line Items]                                                  
Related party transaction, annual management fee                                         $ 14 ¥ 100,000      
Dalian Jin Gang Group | Management Service Agreement Amended                                                  
Related Party Transaction [Line Items]                                                  
Related party transaction, annual management fee $ 7 ¥ 44,000                                              
Sino Bioway Biotech Group Holding Limited                                                  
Related Party Transaction [Line Items]                                                  
Related party transaction number of supplemental agreements with related party                   4                              
Related party transaction operating leases number of lease agreements amended                   4                              
Related party transaction, operating lease annual rent                                       $ 7,796          
Sino Bioway Biotech Group Holding Limited | Operating Lease Agreements Production Plant And Laboratory                                                  
Related Party Transaction [Line Items]                                                  
Number of operating lease agreements | Agreement                                               2  
Related party transaction, operating lease annual rent                                     ¥ 1,400,000         $ 197  
Related party transaction, lease term                                     20 years            
Sino Bioway Biotech Group Holding Limited | Operating Lease Agreement After Amendment Production Plant And Laboratory                                                  
Related Party Transaction [Line Items]                                                  
Related party transaction, operating lease annual rent                             $ 197 ¥ 1,400,000                  
Sino Bioway Biotech Group Holding Limited | Operating Lease Agreement Before Amendment Production Plant And Laboratory                                                  
Related Party Transaction [Line Items]                                                  
Related party transaction, operating lease annual rent                             $ 75 ¥ 500,000                  
Sino Bioway Biotech Group Holding Limited | Operating Lease Agreement Expansion Of Production Plant                                                  
Related Party Transaction [Line Items]                                                  
Related party transaction, operating lease annual rent                                 $ 296                
Sino Bioway Biotech Group Holding Limited | Operating Lease Agreement Expansion Of Research And Development Business                                                  
Related Party Transaction [Line Items]                                                  
Related party transaction, operating lease annual rent                         $ 146 ¥ 1,000,000.0       ¥ 2,000,000.0              
Related party transaction, lease term                         5 years 5 years     20 years 20 years              
Loan One and Two                                                  
Related Party Transaction [Line Items]                                                  
Proceeds from related party debt               $ 6,130 ¥ 40,000,000                                
Loan Three                                                  
Related Party Transaction [Line Items]                                                  
Proceeds from related party debt                     $ 1,533 ¥ 10,000,000                          
Loan Three | Dalian Jin Gang Group                                                  
Related Party Transaction [Line Items]                                                  
Debt instrument, interest rate, stated percentage                                       6.50%          
Loan Four                                                  
Related Party Transaction [Line Items]                                                  
Proceeds from related party debt       $ 4,597 ¥ 30,000,000                                        
Loan Four | Dalian Jin Gang Group                                                  
Related Party Transaction [Line Items]                                                  
Debt instrument, interest rate, stated percentage                                       6.50%          
Loan One | Dalian Jin Gang Group                                                  
Related Party Transaction [Line Items]                                                  
Debt instrument, interest rate, stated percentage                                       6.50%          
Loan Two | Dalian Jin Gang Group                                                  
Related Party Transaction [Line Items]                                                  
Debt instrument, interest rate, stated percentage                                       6.50%