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Debt - Narrative (Details) - USD ($)
1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Apr. 15, 2015
Nov. 21, 2014
May 31, 2016
Aug. 31, 2015
May 31, 2015
Jan. 31, 2017
May 31, 2017
Jan. 31, 2017
Jan. 31, 2016
Debt Instrument [Line Items]                  
Payment of principal               $ 2,796,590 $ 1,465,109
Senior Notes                  
Debt Instrument [Line Items]                  
Repayment of credit facility       $ 250,000 $ 750,000        
Revolving Credit Facility                  
Debt Instrument [Line Items]                  
Commitment fee in connection with the term loan               11,000  
Credit Agreement                  
Debt Instrument [Line Items]                  
Repayment of credit facility   $ 7,400,000              
Amortization of financing costs   355,000              
Credit Agreement | Senior term loan                  
Debt Instrument [Line Items]                  
Revolving line of credit   10,000,000              
Credit Agreement | Revolving Credit Facility                  
Debt Instrument [Line Items]                  
Revolving line of credit   $ 5,000,000       $ 5,000,000   5,000,000  
Borrowings outstanding           0   0  
Credit Agreement | Senior Notes                  
Debt Instrument [Line Items]                  
Repayment of credit facility           500,000      
Payment of principal     $ 1,738,000            
Minimum | LIBOR | Credit Agreement                  
Debt Instrument [Line Items]                  
Borrowing under the revolving loan bears interest at a rate equal to LIBOR plus 4.25% 4.25%              
Minimum | Base Rate | Credit Agreement                  
Debt Instrument [Line Items]                  
Borrowing under the revolving loan bears interest at a rate equal to LIBOR plus 3.25% 3.25%              
Maximum | LIBOR | Credit Agreement                  
Debt Instrument [Line Items]                  
Borrowing under the revolving loan bears interest at a rate equal to LIBOR plus 6.25% 5.25%              
Maximum | Base Rate | Credit Agreement                  
Debt Instrument [Line Items]                  
Borrowing under the revolving loan bears interest at a rate equal to LIBOR plus 5.25% 4.25%              
April 16, 2015 through and including July 30, 2015 | Credit Agreement                  
Debt Instrument [Line Items]                  
Minimum liquidity           $ 6,500,000   6,500,000  
January 31, 2017 | Credit Agreement                  
Debt Instrument [Line Items]                  
Minimum EBITDA level               $ 0  
Scenario, Forecast | Credit Agreement | Senior Notes                  
Debt Instrument [Line Items]                  
Repayment of credit facility             $ 500,000