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NOTE J - CREDIT FACILITY (Details) (USD $)
 6 Months Ended
Oct. 31, 2013
Oct. 31, 2012
Apr. 30, 2013
NOTE J - CREDIT FACILITY (Details) [Line Items]      
Proceeds from Lines of Credit (in Dollars) $ 4,100,000 $ 4,000,000  
Long-term Debt, Excluding Current Maturities (in Dollars) 10,100,000   6,000,000
Line of Credit Borrowed on June 6, 2013 [Member] | JP Morgan Chase Bank [Member]
      
NOTE J - CREDIT FACILITY (Details) [Line Items]      
Proceeds from Lines of Credit (in Dollars) 7,200,000    
Line of Credit Additional Amount Borrowed During the Period [Member] | JP Morgan Chase Bank [Member]
      
NOTE J - CREDIT FACILITY (Details) [Line Items]      
Proceeds from Lines of Credit (in Dollars) 2,900,000    
JP Morgan Chase Bank [Member]
      
NOTE J - CREDIT FACILITY (Details) [Line Items]      
Line of Credit Facility, Maximum Borrowing Capacity (in Dollars) 25,000,000    
Line of Credit Facility, Borrowing Capacity, Description Pursuant to the Credit Agreement, the amount of Tranche A borrowings may not exceed the value of the Pledged Investments (as defined in the Credit Agreement).The amount of Tranche B borrowings may not exceed the lesser of (i) $15.0 million and (ii) the Borrowing Base (as defined in the Credit Agreement).Current outstanding borrowings under the Facility are all under Tranche A.    
Line of Credit Facility, Collateral The Facility is fully guaranteed by certain of the Company's subsidiaries and is secured by, among other things, a pledge of substantially all personal property of the Company and certain of the Company's subsidiaries.    
Line of Credit Facility, Interest Rate Description rate equal to the LIBOR Rate, as determined from time to time by JPMorgan pursuant to the terms of the Note, plus a margin of 0.75% for Tranche A borrowings and 1.75% for Tranche B borrowings.    
Debt Instrument, Maturity Date Jun. 05, 2018    
Line of Credit Facility, Commitment Fee Description required to pay JPMorgan fees equal to 0.1% per annum on any unused portion of the Facility.    
Former Financial Institution [Member]
      
NOTE J - CREDIT FACILITY (Details) [Line Items]      
Line of Credit Facility, Maximum Borrowing Capacity (in Dollars) $ 9,300,000