Subsequent Event	12 Months Ended
Apr. 30, 2013
Subsequent Events [Abstract]
Subsequent Event	Note 10—Subsequent Event On May 6, 2013, the Company entered into a new credit and security agreement (the “Loan Agreement”) with a new lender consisting of (1) a $20 million revolving credit facility which matures on May 1, 2016 (“Line of Credit”), (2) a term loan in the amount of $3,450,000 which matures on May 1, 2020 (“Term Loan A”) and (3) a term loan in the amount of $1,550,000 which matures on May 1, 2020 (“Term Loan B” and together with Term Loan A, the “Term Loans”). The Line of Credit provided funds to refinance all existing indebtedness to the Company’s current lender and for working capital and other general corporate purposes. In addition, it provides for the issuance of up to $4.7 million of letters of credit for our account. Indebtedness under the Line of Credit bears interest at a variable rate per annum equal to Daily One Month LIBOR plus 1.5% per annum. Payments are due under Term Loan A in consecutive equal monthly principal payments in the amount of $17,000 until August 1, 2017, and then in consecutive equal monthly principal payments in the amount of $79,000 each, commencing on September 1, 2017 and continuing on the first business day of each month thereafter until May 1, 2020, and at that time, all principal, accrued unpaid interest and other charges outstanding under Term Loan A shall be due and payable in full. The interest rate on Term Loan A, after consideration of interest rate swap agreements, is a fixed rate per annum equal to 4.875%, and effective August 1, 2017, such rate converts to a fixed rate per annum of 4.37%. Payments are due under the Term Loan B in consecutive equal monthly principal payments in the amount of $18,000 until May 1, 2020, and at that time, all principal, accrued unpaid interest and other charges outstanding under Term Loan B shall be due and payable in full. The interest rate on Term Loan B, after consideration of interest rate swap agreement, is a variable rate per annum equal to One Month LIBOR plus 1.575% per annum, and effective November 3, 2014, such rate converts to a fixed rate per annum of 3.07%. On June 24, 2013, the Company entered into an Agreement (the “Agreement”) through one of its subsidiaries, to purchase the 49% minority ownership of its subsidiary, Kewaunee Labway Asia Pte. Ltd. (the “Subsidiary”) for a total purchase price of $3,550,000. The purchase price includes $1,800,000 representing the minority ownership share of the accumulated undistributed earnings of the Subsidiary reported as noncontrolling interest in the Company’s total equity shown in the Company’s consolidated balance sheet at April 30, 2013. The terms under the Agreement include payments of $1,775,000 at the date of the agreement, $887,500 on June 24, 2014 and $887,500 on June 24, 2015. The Subsidiary and its subsidiary in India, Kewanee Labway India Pvt. Ltd., serve as the Company’s principal sales and distribution organization for sales to international customers.

Note 10—Subsequent Event

On May 6, 2013, the Company entered into a new credit and security agreement (the “Loan Agreement”) with a new lender consisting of (1) a $20 million revolving credit facility which matures on May 1, 2016 (“Line of Credit”), (2) a term loan in the amount of $3,450,000 which matures on May 1, 2020 (“Term Loan A”) and (3) a term loan in the amount of $1,550,000 which matures on May 1, 2020 (“Term Loan B” and together with Term Loan A, the “Term Loans”). The Line of Credit provided funds to refinance all existing indebtedness to the Company’s current lender and for working capital and other general corporate purposes. In addition, it provides for the issuance of up to $4.7 million of letters of credit for our account. Indebtedness under the Line of Credit bears interest at a variable rate per annum equal to Daily One Month LIBOR plus 1.5% per annum. Payments are due under Term Loan A in consecutive equal monthly principal payments in the amount of $17,000 until August 1, 2017, and then in consecutive equal monthly principal payments in the amount of $79,000 each, commencing on September 1, 2017 and continuing on the first business day of each month thereafter until May 1, 2020, and at that time, all principal, accrued unpaid interest and other charges outstanding under Term Loan A shall be due and payable in full. The interest rate on Term Loan A, after consideration of interest rate swap agreements, is a fixed rate per annum equal to 4.875%, and effective August 1, 2017, such rate converts to a fixed rate per annum of 4.37%. Payments are due under the Term Loan B in consecutive equal monthly principal payments in the amount of $18,000 until May 1, 2020, and at that time, all principal, accrued unpaid interest and other charges outstanding under Term Loan B shall be due and payable in full. The interest rate on Term Loan B, after consideration of interest rate swap agreement, is a variable rate per annum equal to One Month LIBOR plus 1.575% per annum, and effective November 3, 2014, such rate converts to a fixed rate per annum of 3.07%.

On June 24, 2013, the Company entered into an Agreement (the “Agreement”) through one of its subsidiaries, to purchase the 49% minority ownership of its subsidiary, Kewaunee Labway Asia Pte. Ltd. (the “Subsidiary”) for a total purchase price of $3,550,000. The purchase price includes $1,800,000 representing the minority ownership share of the accumulated undistributed earnings of the Subsidiary reported as noncontrolling interest in the Company’s total equity shown in the Company’s consolidated balance sheet at April 30, 2013. The terms under the Agreement include payments of $1,775,000 at the date of the agreement, $887,500 on June 24, 2014 and $887,500 on June 24, 2015. The Subsidiary and its subsidiary in India, Kewanee Labway India Pvt. Ltd., serve as the Company’s principal sales and distribution organization for sales to international customers.