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RESTRICTED STOCK AGREEMENTS (Details)
12 Months Ended
Sep. 21, 2016
employee
shares
Apr. 30, 2019
USD ($)
$ / shares
shares
Apr. 30, 2018
USD ($)
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award      
Stock compensation cost amortized | $   $ 108,000 $ 108,000
Restricted Shares Under Option      
Outstanding at beginning of period   730,000  
Outstanding at end of period   730,000 730,000
Weighted Average Grant Price      
Outstanding at beginning of period, Weighted Average Grant Price (in dollars per share) | $ / shares   $ 0.740  
Outstanding at end of period, Weighted Average Grant Price (in dollars per share) | $ / shares   $ 0.740 $ 0.740
2016 Restricted Stock Grants | Minimum      
Share-based Compensation Arrangement by Share-based Payment Award      
Cumulative annual growth in revenue (as a percentage) 10.00%    
Average economic value added as percentage of revenue (as a percentage) 2.00%    
Stock Award Plan      
Share-based Compensation Arrangement by Share-based Payment Award      
Restriction period of awards 5 years    
Stock Award Plan | Restricted Stock | Three Key Employees      
Share-based Compensation Arrangement by Share-based Payment Award      
Number of key employees receiving award under plan | employee 3    
Aggregate amount of restricted stock awards authorized 730,000    
Number of shares expected to revert during fiscal year     350,000