Financing Agreements Schedule of Debt (Details) (USD $)			12 Months Ended
	Apr. 30, 2013	Apr. 30, 2012	Apr. 30, 2013 Line of Credit [Member]	Apr. 30, 2013 Mortgages [Member]	Apr. 30, 2013 Equipment Loan Note Payable [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount			$ 500,000	$ 650,000	$ 500,000
Proceeds Received			0	650,000	380,000
Line of Credit Facility, Maximum Borrowing Capacity			500,000
Debt Instrument, Unused Borrowing Capacity, Amount				0	120,000
Amount Paid			0	82,000	185,000
Short-term Debt			0
Long-term Debt	(795,000)	(945,000)		568,000	195,000
Debt Instrument, Interest Rate, Stated Percentage			4.00%	4.63%	4.63%
Debt Instrument, Maturity Date			Sep. 27, 2013	Sep. 26, 2015	Sep. 26, 2015
Debt Instrument, Periodic Payment			$ 0	$ 5,038	$ 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