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Organization and Business Activities (Details)
1 Months Ended 3 Months Ended 9 Months Ended
Nov. 10, 2022
USD ($)
Nov. 02, 2022
USD ($)
Sep. 30, 2021
USD ($)
$ / shares
shares
Sep. 30, 2022
USD ($)
Jun. 30, 2022
USD ($)
Mar. 31, 2022
USD ($)
Sep. 30, 2021
USD ($)
$ / shares
Jun. 30, 2021
USD ($)
Mar. 31, 2021
USD ($)
Sep. 30, 2022
USD ($)
shares
Sep. 30, 2021
USD ($)
$ / shares
Jul. 31, 2022
country
Jul. 13, 2022
country
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Liquidity                              
Number of countries, exclusive rights are distributed. | country                       9 9    
Number of additional countries rights are distributed | country                       5 5    
Cash and cash equivalents and restricted cash     $ 52,174,000 $ 14,768,000     $ 52,174,000     $ 14,768,000 $ 52,174,000     $ 47,834,000 $ 41,590,000
Proceeds from at-the-market facility                   $ 3,080,000 $ 42,280,000        
Shares issued       $ 2,165,000 $ 818,000 $ 2,221,000 $ 4,304,000 $ 26,139,000 $ 37,240,000            
Lincoln Park Capital Fund, LLC | Purchase agreement | Ordinary shares                              
Liquidity                              
Number of shares issued | shares                   320,000          
Net proceeds from sale of stock                   $ 4,600,000          
Commitment shares | shares     25,298                        
Commitment share price | $ / shares     $ 0.01       $ 0.01       $ 0.01        
Regular purchase     $ 2,500,000                        
Lincoln Park Capital Fund, LLC | Purchase agreement | Ordinary shares | Minimum                              
Liquidity                              
Shares issued     200,000                        
Lincoln Park Capital Fund, LLC | Purchase agreement | Ordinary shares | Maximum                              
Liquidity                              
Shares issued     $ 23,000,000.0                        
Lincoln Park Capital Fund, LLC | Purchase agreement | Ordinary shares | Share Price Not Below $0.25 Per Share                              
Liquidity                              
Share price | $ / shares     $ 0.25       0.25       0.25        
Lincoln Park Capital Fund, LLC | Purchase agreement | Ordinary shares | Share Price Not Below $0.25 Per Share | Maximum                              
Liquidity                              
Number of shares issued | shares     16,000                        
Lincoln Park Capital Fund, LLC | Purchase agreement | Ordinary shares | Share Price Not Below $2.00 Per Share                              
Liquidity                              
Share price | $ / shares     $ 50.00       50.00       50.00        
Lincoln Park Capital Fund, LLC | Purchase agreement | Ordinary shares | Share Price Not Below $2.00 Per Share | Maximum                              
Liquidity                              
Number of shares issued | shares     24,000                        
Lincoln Park Capital Fund, LLC | Purchase agreement | Ordinary shares | Share Price Not Below $3.00 Per Share                              
Liquidity                              
Share price | $ / shares     $ 75.00       $ 75.00       $ 75.00        
Lincoln Park Capital Fund, LLC | Purchase agreement | Ordinary shares | Share Price Not Below $3.00 Per Share | Maximum                              
Liquidity                              
Number of shares issued | shares     32,000                        
Open Market Sale Agreement | Jefferies LLC | Ordinary shares                              
Liquidity                              
Number of shares issued | shares                   1,249,898          
Proceeds from at-the-market facility                   $ 32,200,000          
Aggregate gross sale proceeds for ordinary shares                   $ 33,500,000          
Subsequent Event | Jefferies LLC | At-the-market offering | Maximum                              
Liquidity                              
Ordinary shares remained unsold $ 8,000,000.0                            
Subsequent Event | Lincoln Park Capital Fund, LLC | Purchase agreement | Maximum                              
Liquidity                              
Ordinary shares remained unsold   $ 18,500,000