Long-term Debt	3 Months Ended
Jul. 31, 2014
Long-term Debt [Abstract]
Long-term Debt	Note D - Long-term Debt The Company has a senior secured credit facility with Wells Fargo with a credit limit up to $30,000,000 and an initial term through September 30, 2013. The facility allows the Company to choose among interest rates at which it may borrow funds. The credit facility is collateralized by substantially all of the domestically located assets of the Company and the Company has pledged 65% of its equity ownership interest in some of its foreign entities. The Company is required to be in compliance with several financial covenants. In May 2012 two of the financial covenants under the senior secured credit facility were amended. During the quarter ended October 31, 2013, the Company renewed its senior secured credit facility. The facility was revised to extend the term of the agreement to October 31, 2015. Note D - Long-term Debt - Continued As of July 31, 2014, there was a $22,921,454 outstanding balance and $7,078,546 of unused availability under the credit facility agreement, assuming the company remained in compliance with its financial covenants. The facility allows the Company to choose among interest rates at which it may borrow funds. The interest rate is prime rate (3.25% at July 31, 2014) or LIBOR plus two and a one half percent (2.75% at July 31, 2014), which is paid monthly. At July 31, 2014, the Company was in compliance with its amended financial covenants. In August 2014 the Company and Wells Fargo, N.A. agreed on a proposal to extend the existing senior secured credit facility for three years from the date of closing. Under the proposal financial covenants will be amended, an unused line fee will be added and the net borrowing interest rate will be reduced. The Company expects the transaction will close by October 31, 2014. The Company entered into a mortgage agreement on January 8, 2010, in the amount of $2,500,000, with Wells Fargo to refinance the property that serves as the Company’s corporate headquarters and its Illinois manufacturing facility. The Wells Fargo note bears interest at a fixed rate of 6.42% per year and is amortized over a sixty month period. A final payment of approximately $2,000,000 is due on or before January 8, 2015. The outstanding balance as of July 31, 2014 was $2,050,018. The Company entered into a mortgage agreement on October 24, 2013, in the amount of $1,275,000, with Wells Fargo to finance the property that serves as the Company’s engineering and design center in Elgin, Illinois. The Wells Fargo note requires the Company to pay monthly principal payments in the amount of $4,250 and bears interest at a fixed rate of 4.5% per year and is payable over a sixty month period. A final payment of approximately $1,030,000 is due on or before October 2018. The outstanding balance as of July 31, 2014 was $1,236,750.

Note D - Long-term Debt

The Company has a senior secured credit facility with Wells Fargo with a credit limit up to $30,000,000 and an initial term through September 30, 2013. The facility allows the Company to choose among interest rates at which it may borrow funds. The credit facility is collateralized by substantially all of the domestically located assets of the Company and the Company has pledged 65% of its equity ownership interest in some of its foreign entities. The Company is required to be in compliance with several financial covenants.

In May 2012 two of the financial covenants under the senior secured credit facility were amended. During the quarter ended October 31, 2013, the Company renewed its senior secured credit facility. The facility was revised to extend the term of the agreement to October 31, 2015.

Note D - Long-term Debt - Continued

As of July 31, 2014, there was a $22,921,454 outstanding balance and $7,078,546 of unused availability under the credit facility agreement, assuming the company remained in compliance with its financial covenants. The facility allows the Company to choose among interest rates at which it may borrow funds. The interest rate is prime rate (3.25% at July 31, 2014) or LIBOR plus two and a one half percent (2.75% at July 31, 2014), which is paid monthly. At July 31, 2014, the Company was in compliance with its amended financial covenants.

In August 2014 the Company and Wells Fargo, N.A. agreed on a proposal to extend the existing senior secured credit facility for three years from the date of closing. Under the proposal financial covenants will be amended, an unused line fee will be added and the net borrowing interest rate will be reduced. The Company expects the transaction will close by October 31, 2014.

The Company entered into a mortgage agreement on January 8, 2010, in the amount of $2,500,000, with Wells Fargo to refinance the property that serves as the Company’s corporate headquarters and its Illinois manufacturing facility. The Wells Fargo note bears interest at a fixed rate of 6.42% per year and is amortized over a sixty month period. A final payment of approximately $2,000,000 is due on or before January 8, 2015. The outstanding balance as of July 31, 2014 was $2,050,018.

The Company entered into a mortgage agreement on October 24, 2013, in the amount of $1,275,000, with Wells Fargo to finance the property that serves as the Company’s engineering and design center in Elgin, Illinois. The Wells Fargo note requires the Company to pay monthly principal payments in the amount of $4,250 and bears interest at a fixed rate of 4.5% per year and is payable over a sixty month period. A final payment of approximately $1,030,000 is due on or before October 2018. The outstanding balance as of July 31, 2014 was $1,236,750.