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Risks and Uncertainties (Details) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 9 Months Ended 12 Months Ended
Aug. 15, 2018
Jul. 27, 2018
Aug. 15, 2018
Sep. 30, 2018
Sep. 30, 2017
Dec. 31, 2017
Risks and Uncertainties [Abstract]            
Working capital       $ 56,030   $ 12,813
Initial public offering [Abstract]            
Share price (in dollars per share)       $ 15.00    
Net cash proceeds from initial public offering     $ 63,484 $ 68,714 $ 0  
Initial Public Offering [Member]            
Initial public offering [Abstract]            
Number of common shares issued (in shares)   4,500,000        
Share price (in dollars per share)   $ 15.00        
Net cash proceeds from initial public offering   $ 57,545        
Over-Allotment Option [Member]            
Initial public offering [Abstract]            
Number of common shares issued (in shares) 425,727          
Share price (in dollars per share) $ 15.00   $ 15.00      
Net cash proceeds from initial public offering $ 5,939          
Revenue [Member] | Indivior [Member]            
Customer Concentration [Abstract]            
Concentrations of risk       95.00% 88.00%  
Receivables [Member] | Indivior [Member]            
Customer Concentration [Abstract]            
Concentrations of risk       92.00%   93.00%