Note 7 - Pledged Assets, Notes Payable and Long-Term Debt (Tables)

3 Months Ended

Jul. 31, 2013

Debt Disclosure [Abstract]

Schedule of Long-term Debt Instruments [Table Text Block]

	July 31, 2013		April 30, 2013
Industrial Revenue Bonds, Series 2006A, 5-year adjustable interest rate based on the yield on 5-year United States Treasury Notes, plus .45% (1.89% as of January 31, 2013), due in monthly principal and interest payments beginning October 1, 2006 through maturity on September 1, 2026, secured by real estate. Effective September 1, 2011, the 5-year adjustable interest rate was reset to 1.89% for the next five years.	$	2,758	$	2,804
Operating line of credit, $6,000,000 limit on borrowing capacity, prime rate (3.25% at July 31, 2013) plus/minus 0.5% performance based interest, due in full on October 30, 2014, secured by accounts receivable and inventory. The interest rate as of July 31, 2013 was 2.75%		--		--
		2,758		2,804
Less current maturities		186		185
Total long-term debt	$	2,572	$	2,619

Schedule of Maturities of Long-term Debt [Table Text Block]

Year	Amount
2014 (remaining)	$	139
2015		189
2016		192
2017		196
2018		200
Thereafter		1,842
	$	2,758