Annual report pursuant to Section 13 and 15(d)

Debt - Convertible Debt (Details)

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Debt - Convertible Debt (Details) - Convertible Debt - USD ($)
12 Months Ended
Aug. 15, 2019
Jan. 16, 2019
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Aug. 12, 2019
Jun. 29, 2015
Debt Instrument [Line Items]              
Total Convertible Note Interest     $ 6,675,037 $ 8,766,306 $ 8,767,188    
7.00% Unsecured Convertible Senior Notes              
Debt Instrument [Line Items]              
Interest Expense     3,354,178 7,979,118 7,980,000    
Discount Amortization $ 360,000 $ 409,000 320,821 738,912 738,912    
Deferred Debt Issuance Cost Amortization 24,000 27,000 21,004 48,276 48,276    
Total Convertible Note Interest $ 733,000 $ 315,000 $ 3,696,003 $ 8,766,306 $ 8,767,188    
Effective interest rate     7.00% 7.00%     7.00%
Effective percentage     7.70% 7.70% 7.70%    
5.875% Unsecured Convertible Senior Notes              
Debt Instrument [Line Items]              
Interest Expense     $ 2,722,083 $ 0 $ 0    
Discount Amortization     225,458 0 0    
Deferred Debt Issuance Cost Amortization     31,493 0 0    
Total Convertible Note Interest     $ 2,979,034 $ 0 $ 0    
Effective interest rate 5.875%   5.875% 0.00%   5.875%  
Effective percentage     6.40%