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Contingent Liabilities (Narrative) (Details) - USD ($)
3 Months Ended
Oct. 31, 2015
Oct. 31, 2016
Apr. 30, 2016
Sep. 30, 2014
TASCO [Member]        
Business Acquisition, Contingent Consideration [Line Items]        
Earn-out payment     $ 138,000  
TCS [Member]        
Business Acquisition, Contingent Consideration [Line Items]        
Earnout payable       $ 711,000
TCS [Member] | Quarterly, Commencing December 31, 2015 [Member]        
Business Acquisition, Contingent Consideration [Line Items]        
Earn-out payment amount   $ 120,905    
TCS [Member] | Quarterly, Commencing December 31, 2016 [Member]        
Business Acquisition, Contingent Consideration [Line Items]        
Earn-out payment   $ 70,000    
Ready2Ride [Member]        
Business Acquisition, Contingent Consideration [Line Items]        
Earn-out payment $ 125,000      
Shares of common stock issued concurrent with earn-out payment 15,000