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Debt (Details)
1 Months Ended 3 Months Ended 12 Months Ended
Mar. 07, 2018
USD ($)
Mar. 02, 2018
USD ($)
Mar. 31, 2018
USD ($)
Sep. 30, 2017
USD ($)
Mar. 31, 2019
USD ($)
item
Mar. 31, 2018
USD ($)
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Mar. 31, 2017
USD ($)
Debt Instrument [Line Items]                  
Corporate debt         $ 3,484,606   $ 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     $ 923,563   $ 923,766  
Gain (loss) on capital lease         $ 0   $ 0    
Lease payments $ 346,000 $ 404,928     $ 0 $ 70,051      
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         $ 3,484,606   $ 3,484,606    
Term of debt instrument         36 months