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Share Capital (Details Textual)
 3 Months Ended
Mar. 14, 2019
USD ($)
$ / shares
shares
Mar. 07, 2017
USD ($)
$ / shares
Mar. 31, 2020
USD ($)
vote
$ / shares
shares
Mar. 31, 2019
USD ($)
shares
Dec. 31, 2019
USD ($)
shares
Dec. 31, 2018
USD ($)
shares
Share Capital [Line Items]            
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest     $ (172,757,000) $ (174,273,000) $ (179,389,000) $ (246,967,000)
Issuance of common and convertible preference shares       97,629,000    
Series 4 Convertible Preferred Stock            
Share Capital [Line Items]            
Proceeds from issuance of common and convertible preference shares, net of issuance costs     0 97,629,000    
Preferred Stock            
Share Capital [Line Items]            
Proceeds from issuance of common and convertible preference shares, net of issuance costs $ 98,620,000          
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest   $ 90,123,000 152,746,000 152,117,000 $ 152,746,000 $ 90,123,000
Issuance of common and convertible preference shares       $ 61,994,000    
Preferred Stock | Series 4 Convertible Preferred Stock            
Share Capital [Line Items]            
Proceeds from issuance of common and convertible preference shares, net of issuance costs   $ 95,000        
Preferred Stock, Liquidation Preference Per Share | $ / shares   $ 1,000        
Preferred Stock, Conversion Price Per Preference Share | $ / shares $ 7.42 $ 10.00        
Preferred Stock, Accretion of Redemption Discount     2,000      
Preferred Stock, Liquidation Preference, Value     $ 121,000      
Shares outstanding (shares) | shares     145,000,000 145,000,000 145,000,000 95,000,000
Preferred Stock, Conversion Basis, Common Stock Class A Closing Trade Price   125.00%        
Preferred Stock, Liquidation Preference Percentage Rate, Change of Control of the Company   7.00%        
Preferred Stock | Series 6 Convertible Preferred Stock            
Share Capital [Line Items]            
Stock Issued During Period, Shares, Issued For Services, Convertible Preferred Shares | shares 50,000          
Proceeds from issuance of common and convertible preference shares, net of issuance costs $ 50,000,000          
Preferred Stock, Liquidation Preference Per Share | $ / shares $ 1,000          
Preferred Stock, Conversion Price Per Preference Share | $ / shares $ 5.00          
Preferred Stock, Accretion Percentage, Preference 8.00% 8.00%        
Preferred Stock, Accretion Rate, Preference Per Share | $ / shares     $ 8.33      
Preferred Stock, Convertible Preference Shares, Accretion Period 5 years          
Preferred Stock, Monthly Accretion of Redemption Discount     $ 7.10      
Preferred Stock, Accretion of Redemption Discount     1,000      
Preferred Stock, Liquidation Preference, Value     54,000      
Preferred Stock, Convertible Preference Shares, Convertible at Company's Option, Term 2 years          
Preferred Stock, Conversion Basis, Common Stock Class A Closing Trade Price 125.00%          
Preferred Stock, Dividend Rate, Percentage 7.00%          
Additional Paid-in Capital            
Share Capital [Line Items]            
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest     $ 99,587,000 $ 98,693,000 $ 101,469,000 $ 58,579,000
Issuance of common and convertible preference shares $ 35,997     $ 35,635,000    
Common Stock | Common Class A            
Share Capital [Line Items]            
Stock Issued During Period, Shares, Issued for Services | shares 14,285,714          
Proceeds from Issuance of Common Stock $ 50,000,000          
Shares outstanding (shares) | shares     72,479,417   72,150,854  
Common stock, voting rights, number of votes per share | vote     1      
Common Stock | Common Class B            
Share Capital [Line Items]            
Shares outstanding (shares) | shares     3,749   3,749  
Common stock, voting rights, number of votes per share | vote     20      
Contingent Consideration, Liability Settlements [Domain] | Preferred Stock | Series 4 Convertible Preferred Stock            
Share Capital [Line Items]            
Issuance of common and convertible preference shares $ 62,623