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Shareholders' Equity and Non-Controlling Interests (Warrants Narrative) (Details) - USD ($)
9 Months Ended
Sep. 30, 2020
Mar. 11, 2020
Mar. 02, 2020
Feb. 10, 2020
Sep. 30, 2020
Sep. 30, 2019
Sep. 23, 2020
Mar. 06, 2020
Class of Warrant or Right [Line Items]                
Exchange of intangible assets to notes receivable (Note 4) $ 18,800,000 $ 22,000,000   $ 27,887,000 $ 18,800,000 $ 0   $ 18,800,000
Warrants outstanding (shares)       6,085,000        
Strike price per broker warrant (USD per share)     $ 5.80 $ 4.93 $ 4.00      
Expiration period     5 years          
RTO expense settled in shares   27,000 1          
Warrant contractual weighted average life remaining (in years)         4 years      
Aggregate intrinsic value $ 0       $ 0 $ 0    
Grant date fair value (USD per share)           $ 6.74    
Expense recognized           $ 27,000    
Exercise price (USD per share)           $ 25    
Term           2 years    
Fixed Warrants                
Class of Warrant or Right [Line Items]                
Exercise price (USD per share)         $ 17.50      
Floating Shares                
Class of Warrant or Right [Line Items]                
Warrants outstanding (shares) 2,436,000       2,436,000   2,436,000  
Exercise price (USD per share)         $ 7.50      
Granted (shares) 0