CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (USD $) In Thousands, except Share data	Common Stock [Member]	Capital Contributed In Excess Of Par Value [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]	Total
BALANCE at Apr. 30, 2009	$ 742	$ 46,100	$ 84,942	$ (8,846)	$ (26,657)	$ 96,281
BALANCE (in shares) at Apr. 30, 2009	7,421
Net loss	0	0	(9,480)	0	0	(9,480)
Other comprehensive loss	0	0	0	(234)	0	(234)
Total comprehensive loss						(9,714)
BALANCE at Apr. 30, 2010	742	46,100	75,462	(9,080)	(26,657)	86,567
BALANCE (in shares) at Apr. 30, 2010	7,421
Net loss	0	0	(7,561)	0	0	(7,561)
Other comprehensive loss	0	0	0	(60)	0	(60)
Total comprehensive loss						(7,621)
BALANCE at Apr. 30, 2011	742	46,100	67,901	(9,140)	(26,657)	78,946
BALANCE (in shares) at Apr. 30, 2011	7,421
Net loss	0	0	(1,143)	0	0	(1,143)
Other comprehensive loss	0	0	0	(3,158)	0	(3,158)
Total comprehensive loss						(4,301)
BALANCE at Apr. 30, 2012	$ 742	$ 46,100	$ 66,758	$ (12,298)	$ (26,657)	$ 74,645
BALANCE (in shares) at Apr. 30, 2012	7,421