Quarterly report pursuant to Section 13 or 15(d)

Debt - Convertible Debt Information (Details)

v3.20.1
Debt - Convertible Debt Information (Details)
3 Months Ended 12 Months Ended
Jun. 12, 2020
USD ($)
Apr. 29, 2020
USD ($)
Aug. 15, 2019
USD ($)
shares
Aug. 12, 2019
USD ($)
$ / shares
Jan. 16, 2019
USD ($)
$ / shares
shares
Jun. 30, 2020
USD ($)
Mar. 31, 2020
USD ($)
$ / shares
shares
Sep. 30, 2019
USD ($)
Mar. 31, 2019
USD ($)
Dec. 31, 2019
USD ($)
$ / shares
Apr. 30, 2020
USD ($)
Jun. 29, 2015
USD ($)
$ / shares
Debt Instrument [Line Items]                        
Capital stock non-convertible, par value (in dollars per share) | $ / shares             $ 0.001     $ 0.001    
Gain (loss) on extinguishment of debt             $ 0   $ (5,039,731)      
7.00% Convertible Senior Notes                        
Debt Instrument [Line Items]                        
Unamortized discount             3,036     $ 6,681    
5.875% Convertible Senior Notes                        
Debt Instrument [Line Items]                        
Unamortized discount             3,138,562     $ 3,284,542    
Convertible Debt                        
Debt Instrument [Line Items]                        
Interest expense             1,965,124   1,548,448      
Convertible Debt | 7.00% Convertible Senior Notes                        
Debt Instrument [Line Items]                        
Face amount     $ 63,900,000.0       $ 115,000,000         $ 115,000,000.0
Interest rate             7.00%     7.00%   7.00%
Conversion ratio             0.0303030          
Conversion price (in dollars per share) | $ / shares                       $ 33.00
Amount converted         $ 43,800,000   $ 416,000          
Number of shares issued in conversion (in shares) | shares     703,432   837,040   12,605          
Capital stock non-convertible, par value (in dollars per share) | $ / shares         $ 0.001              
Repurchases of convertible debt     $ 60,200,000   $ 19,800,000              
Interest expense     733,000   315,000   $ 35,482   1,548,448      
Gain (loss) on extinguishment of debt         (5,000,000)     $ (28,900,000)   $ (34,000,000)    
Discount amortization     360,000   409,000   3,645   132,910      
Deferred debt issuance amortization     24,000   $ 27,000   622   $ 8,681      
Debt conversion, exchanged instrument, amount     $ 93,200,000                  
Convertible debt outstanding             $ 1,700,000          
Effective interest rate in percentage             8.00%   7.70%      
Convertible Debt | 7.00% Convertible Senior Notes | Subsequent Event                        
Debt Instrument [Line Items]                        
Repurchases of convertible debt $ 1,700,000                      
Interest expense $ 59,000                      
Convertible Debt | 5.875% Convertible Senior Notes                        
Debt Instrument [Line Items]                        
Face amount       $ 120,000,000.0     $ 120,000,000          
Interest rate       5.875%     5.875%     5.875%    
Conversion ratio             0.0200000          
Conversion price (in dollars per share) | $ / shares       $ 50.00                
Interest expense             $ 1,929,642   $ 0      
Discount amortization             145,980   0      
Deferred debt issuance amortization             $ 21,162   $ 0      
Redemption price in percentage       100.00%                
Unamortized discount       $ 3,500,000                
Debt issuance costs, gross       $ 508,000                
Effective interest rate in percentage             6.40%          
Minimum balance to trigger default upon qualified event             $ 25,000,000          
Convertible Debt | 5.875% Convertible Senior Notes | Subsequent Event                        
Debt Instrument [Line Items]                        
Repurchases of convertible debt   $ 1,300,000                    
Interest expense   24,000                    
Gain (loss) on extinguishment of debt           $ 576,000            
Convertible debt outstanding                     $ 118,100,000  
Debt instrument, repurchased face amount   $ 2,000,000