Quarterly report pursuant to Section 13 or 15(d)

CONCENTRATIONS (Details Textual)

v3.3.1.900
CONCENTRATIONS (Details Textual) - USD ($)
3 Months Ended 6 Months Ended
Oct. 31, 2015
Oct. 31, 2014
Oct. 31, 2015
Oct. 31, 2014
Apr. 30, 2015
Concentration Risk [Line Items]          
Contract Receivable Retainage, Total $ 1,243,000   $ 1,243,000   $ 1,119,000
Accounts Receivable [Member] | Customer One [Member]          
Concentration Risk [Line Items]          
Concentration Risk, Percentage     27.00%    
Accounts Receivable [Member] | Customer Two [Member]          
Concentration Risk [Line Items]          
Concentration Risk, Percentage     20.00%    
Sales Revenue, Net [Member] | Customer One [Member]          
Concentration Risk [Line Items]          
Concentration Risk, Percentage   67.00% 23.00% 59.00%  
Sales Revenue, Net [Member] | Customer Two [Member]          
Concentration Risk [Line Items]          
Concentration Risk, Percentage 25.00%   11.00%