Quarterly report pursuant to Section 13 or 15(d)

Fair Value (Details)

v3.20.2
Fair Value (Details) - USD ($)
Sep. 30, 2020
Dec. 31, 2019
Aug. 12, 2019
Jun. 29, 2015
Convertible Debt | 7.00% Unsecured Convertible Senior Notes        
Financial Liabilities:        
Interest rate 7.00% 7.00%   7.00%
Convertible Debt | 5.875% Unsecured Convertible Senior Notes        
Financial Liabilities:        
Interest rate 5.875% 5.875% 5.875%  
Carrying Amount | Level 1        
Financial Assets:        
Cash and cash equivalents $ 104,221,404 $ 120,863,643    
Carrying Amount | Level 1 | 7.00% Unsecured Convertible Senior Notes        
Financial Liabilities:        
Unsecured Convertible Senior Notes 0 2,084,178    
Carrying Amount | Level 2        
Financial Liabilities:        
Secured credit facilities 0 33,785,930    
Carrying Amount | Level 2 | 5.875% Unsecured Convertible Senior Notes        
Financial Liabilities:        
Unsecured Convertible Senior Notes 114,843,705 116,239,318    
Carrying Amount | Level 3        
Financial Assets:        
Financing notes receivable (Note 5) 1,202,960 1,235,000    
Fair Value | Level 1        
Financial Assets:        
Cash and cash equivalents 104,221,404 120,863,643    
Fair Value | Level 1 | 7.00% Unsecured Convertible Senior Notes        
Financial Liabilities:        
Unsecured Convertible Senior Notes 0 2,820,832    
Fair Value | Level 2        
Financial Liabilities:        
Secured credit facilities 0 33,785,930    
Fair Value | Level 2 | 5.875% Unsecured Convertible Senior Notes        
Financial Liabilities:        
Unsecured Convertible Senior Notes 84,957,044 122,508,000    
Fair Value | Level 3        
Financial Assets:        
Financing notes receivable (Note 5) $ 1,202,960 $ 1,235,000