Financing Agreements Schedule of Debt (Details) (USD $)			12 Months Ended
	Apr. 30, 2014	Apr. 30, 2013	Apr. 30, 2014 Line of Credit [Member]	Apr. 30, 2014 Mortgages [Member]	Apr. 30, 2014 Equipment Loan Note Payable [Member]
Debt Instrument [Line Items]
Prepayment Allowed				$ 100,000
Debt Instrument, Face Amount			500,000	542,000	500,000
Proceeds Received			0	542,000	380,000
Line of Credit Facility, Maximum Borrowing Capacity			500,000
Mortgage Unused Amount				0
Debt Instrument, Unused Borrowing Capacity, Amount					(236,000)
Amount Paid			0	9,000	264,000
Short-term Debt			0
Long-term Debt	651,000	795,000		533,000	116,000
Debt Instrument, Interest Rate, Stated Percentage			4.00%	4.05%	4.63%
Debt Instrument, Maturity Date			Sep. 27, 2014	Jan. 27, 2019	Sep. 26, 2015
Debt Instrument, Periodic Payment			$ 0	$ 4,873	$ 7,123
Additional Debt Disclosure			Borrowing base limited to 75% of eligible receivables	15 year amortization schedule	Advance rate equal to 80% of the price of the equipment purchased