FINANCING AGREEMENTS (Details)		6 Months Ended
	Feb. 21, 2014 USD ($)	Oct. 31, 2017 USD ($) agreement	Apr. 30, 2017 USD ($)	Mar. 31, 2017 USD ($)
Long-term indebtedness
Total long-term debt		$ 1,946,000	$ 1,048,000
Less current installments		1,418,000	603,000
Long-term debt, excluding current installments		$ 528,000	445,000
Mortgage note payable
Long-term indebtedness
Proceeds Received	$ 0
Annual prepayment limit	$ 100,000
Line of Credit
Long-term indebtedness
Number of agreements | agreement		2
Capital Leases
Long-term indebtedness
Total long-term debt		$ 215,000
Note payable 4.05 percent | Mortgage note payable
Long-term indebtedness
Total long-term debt		$ 394,000	415,000
Rate		4.05%
Monthly installments		$ 4,873
Final payment		349,000
Working line of credit 4.00 percent | Line of Credit
Long-term indebtedness
Total long-term debt		750,000	465,000
Maximum borrowing		$ 1,250,000
Working line of credit 4.00 percent | Line of Credit | Minimum
Long-term indebtedness
Rate		4.00%
Working line of credit 4.00 percent | Line of Credit | Prime Rate
Long-term indebtedness
Rate		4.25%
Building line of credit 4.00 percent | Line of Credit
Long-term indebtedness
Total long-term debt		$ 465,000
Maximum borrowing				$ 500,000
Building line of credit 4.00 percent | Line of Credit | Minimum
Long-term indebtedness
Rate				4.00%
Building line of credit 4.00 percent | Line of Credit | Prime Rate
Long-term indebtedness
Rate				4.25%
Note payable 4.75 percent | Note Payable
Long-term indebtedness
Total long-term debt		$ 15,000	28,000
Rate		4.75%
Monthly installments		$ 2,269
Note payable 3.75 percent | Note Payable
Long-term indebtedness
Total long-term debt		12,000	25,000
Notes Payable		$ 0
Rate		3.75%
Monthly installments		$ 2,112
Note payable 4.05 percent | Note Payable
Long-term indebtedness
Total long-term debt		$ 95,000	$ 115,000
Rate		4.05%
Monthly installments		$ 3,680
Equipment line of credit
Long-term indebtedness
Equipment financing maximum borrowing		$ 500,000