FINANCING AGREEMENTS (SCHEDULE OF DEBT) (Details) - USD ($)	3 Months Ended
	Jul. 31, 2015	Apr. 30, 2015	Jul. 31, 2014	Feb. 21, 2014
Long-term indebtedness
Total long-term debt	$ 637,000		$ 681,000
Current maturities	101,000	$ 122,000	122,000
Long-term Debt, Excluding Current Maturities, Total	536,000	$ 559,000	559,000
Mortgage note payable
Long-term indebtedness
Total debt outstanding	$ 486,000		495,000
Principal amount				$ 542,000
Rate	4.05%
Final Payment	$ 349,000
Monthly installments	$ 4,873
Line of Credit
Long-term indebtedness
Rate	4.00%
Interest rate floor	4.00%
Line of Credit | Prime Rate
Long-term indebtedness
Rate	3.25%
Note Payable
Long-term indebtedness
Maximum borrowing	$ 500,000
Equipment financing maximum borrowing	500,000
Note payable 4.63 percent
Long-term indebtedness
Total debt outstanding	$ 15,000		36,000
Rate	4.63%
Monthly installments	$ 7,123
Note payable 4.75 percent
Long-term indebtedness
Total debt outstanding	$ 71,000		77,000
Rate	4.75%
Monthly installments	$ 2,269
Note payable 3.75 percent
Long-term indebtedness
Total debt outstanding	$ 65,000		$ 73,000
Rate	3.75%
Monthly installments	$ 2,112