Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jul. 31, 2012	Jul. 31, 2011
Operating Activities
Net income (loss)	$ 561	$ (2,716)
Adjustments to reconcile net income (loss) to net cash provided (used) by operating activities:
Depreciation and amortization	3,873	5,974
Net (gain) loss on disposal of property, plant, and equipment	(5)	16
Gain on sale of assets held for sale	(57)	0
Stock-based compensation expense	985	979
Deferred income taxes	416	(1,255)
Pension contributions (in excess) less than expense	(1,330)	1,825
Other non-cash items	(732)	(297)
Changes in operating assets and liabilities:
Customer receivables	(1,342)	313
Inventories	(2,159)	(766)
Income taxes receivable and other assets	(632)	(1,177)
Accounts payable	1,690	(375)
Accrued compensation and related expenses	(4,127)	(759)
Other accrued expenses	(913)	2,446
Net Cash Provided (Used) by Operating Activities	(3,772)	4,208
Investing Activities
Payments to acquire property, plant, and equipment	(2,185)	(1,261)
Proceeds from sales of property, plant, and equipment	1	14
Proceeds from sale of assets held for sale	1,777	0
Investment in promotional displays	(1,456)	(840)
Net Cash Used by Investing Activities	(1,863)	(2,087)
Financing Activities
Payments of long-term debt	(185)	(154)
Proceeds from issuance of common stock	0	18
Payment of dividends	0	(1,287)
Net Cash Used by Financing Activities	(185)	(1,423)
Net Increase (Decrease) in Cash And Cash Equivalents	(5,820)	698
Cash And Cash Equivalents, Beginning of Period	66,620	55,420
Cash And Cash Equivalents, End of Period	$ 60,800	$ 56,118