Financing Agreements Schedule of Debt (Details) (USD $)	3 Months Ended
	Jul. 31, 2012
Line of Credit [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 500,000
Proceeds Received	0
Line of Credit Facility, Maximum Borrowing Capacity	500,000
Amount Paid	0
Short-term Debt	0
Debt Instrument, Interest Rate, Stated Percentage	4.00%
Debt Instrument, Maturity Date	Sep. 26, 2012
Debt Instrument, Periodic Payment	0
Additional Debt Disclosure	Borrowing base limited to 75% of eligible receivables
Mortgages [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	650,000
Proceeds Received	650,000
Debt Instrument, Unused Borrowing Capacity, Amount	0
Amount Paid	57,000
Long-term Debt	593,000
Debt Instrument, Interest Rate, Stated Percentage	4.63%
Debt Instrument, Maturity Date	Sep. 26, 2015
Debt Instrument, Periodic Payment	5,038
Additional Debt Disclosure	15 year amortization schedule
Equipment Loan Note Payable [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	500,000
Proceeds Received	380,000
Debt Instrument, Unused Borrowing Capacity, Amount	120,000
Amount Paid	129,000
Long-term Debt	251,000
Debt Instrument, Interest Rate, Stated Percentage	4.63%
Debt Instrument, Maturity Date	Sep. 26, 2015
Debt Instrument, Periodic Payment	$ 7,123
Additional Debt Disclosure	Advance rate equal to 80% of the price of the equipment purchased