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Share-based Compensation - Summary of Changes in Stock Options (Details)
12 Months Ended
Dec. 31, 2020
shares
$ / shares
Dec. 31, 2019
shares
$ / shares
Disclosure Of Terms And Conditions Of Sharebased Payment Arrangement [Line Items]    
Balance at December 31, 2020 2,080,000  
Stock Options    
Disclosure Of Terms And Conditions Of Sharebased Payment Arrangement [Line Items]    
Balance at December 31, 2019 623,850  
Granted 481,600 623,850
Forfeited (384,850)  
Balance at December 31, 2020 720,600 623,850
Weighted average exercise price, beginning balance | $ / shares $ 4.33  
Weighted average exercise price, Granted | $ / shares 1.16 $ 4.33
Weighted average exercise price, Forfeited | $ / shares 4.96  
Weighted average exercise price, ending balance | $ / shares $ 1.82 $ 4.33