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Long-Term Debt - Narrative (Details) - USD ($)
Jan. 13, 2017
Mar. 31, 2019
Feb. 28, 2019
Dec. 31, 2018
Debt Instrument [Line Items]        
Interest paid with additional debentures   $ 8,733,068   $ 9,828,508
Senior Secured Debenture due 2021 | Secured Debt        
Debt Instrument [Line Items]        
Principal amount $ 10,723,000      
Note Payable - GF Comstock 2 LP | Secured Debt        
Debt Instrument [Line Items]        
Interest rate   11.00%    
Equity interest in subsidiaries pledged as collateral (as a percent) 100.00%      
Discount on issuance of debt $ 568,000      
Debt issuance costs 528,000      
Early repayment, make whole payment $ 688,000      
Remaining balance of make whole obligation   $ 418,765    
Initial periodic payment period 2 years      
Interest paid with additional debentures   7,853,076   $ 8,872,663
Loan Commitment Agreement Due 2021 | Line of Credit        
Debt Instrument [Line Items]        
Interest rate     11.00%  
Maximum borrowing capacity     $ 10,000,000  
Long-term line of credit borrowing outstanding   0    
Unused borrowing capacity   $ 9,500,000