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Debt (Details)
1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Mar. 07, 2018
USD ($)
Mar. 02, 2018
USD ($)
Mar. 31, 2018
USD ($)
Sep. 30, 2017
USD ($)
Mar. 31, 2018
USD ($)
Jun. 30, 2019
USD ($)
item
Jun. 30, 2018
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2018
USD ($)
Mar. 31, 2017
USD ($)
Debt Instrument [Line Items]                    
Corporate debt           $ 3,481,819     $ 3,484,606  
Average interest rate           3.70%     3.70%  
Revolver                    
Debt Instrument [Line Items]                    
Interest expense           $ 0        
Debt maturity           Aug. 05, 2019        
Collateral           $ 5,000,000        
Maximum borrowing capacity           $ 1,750,000        
London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member] | Revolver                    
Debt Instrument [Line Items]                    
Variable interest rate           2.00%        
London Interbank Offered Rate (LIBOR) [Member] | Maximum | Revolver                    
Debt Instrument [Line Items]                    
Variable interest rate           3.50%        
Capital Lease Obligations [Member]                    
Debt Instrument [Line Items]                    
Interest rate           4.70%        
Collateral             $ 923,563 $ 923,766    
Gain (loss) on capital lease         $ 0     $ 0    
Lease payments           $ 0 $ 70,051      
Capital Lease Obligations [Member] | Bofi Federal Bank [Member]                    
Debt Instrument [Line Items]                    
Lease payments $ 346,000 $ 404,928                
Debt Obligation [Member]                    
Debt Instrument [Line Items]                    
Face amount of debt instrument                   $ 3,500,000
Interest rate           3.65%        
Collateral           $ 1,000,000        
Term of debt instrument           5 years        
Debt Obligation [Member] | Bofi Federal Bank B [Member]                    
Debt Instrument [Line Items]                    
Repayments of borrowed funds       $ 500,000            
Face amount of debt instrument           $ 500,000        
Debt Obligation [Member] | Bofi Federal Bank C [Member]                    
Debt Instrument [Line Items]                    
Repayments of borrowed funds     $ 75,000              
Face amount of debt instrument           75,000        
Debt Obligation [Member] | Bofi Federal Bank B & C [Member]                    
Debt Instrument [Line Items]                    
Face amount of debt instrument           $ 500,000        
Number of debt agreements | item           2        
Optional prepayment term           12 months        
Debt           $ 3,481,819     $ 3,484,606  
Term of debt instrument           36 months