Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jul. 31, 2013	Jul. 31, 2012
OPERATING ACTIVITIES
Net income	$ 6,655	$ 561
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	3,542	3,873
Net gain on disposal of property, plant, and equipment	(27)	(5)
Gain on sale of assets held for sale	0	(57)
Gain on insurance recoveries	(94)	0
Stock-based compensation expense	861	985
Deferred income taxes	1,438	416
Pension contributions in excess of expense	(398)	(1,330)
Tax benefit from stock-based compensation	(197)	0
Other non-cash items	(319)	(732)
Changes in operating assets and liabilities:
Customer receivables	(6,441)	(1,342)
Inventories	(1,497)	(2,159)
Prepaid expenses and other assets	191	(632)
Accounts payable	443	1,690
Accrued compensation and related expenses	(4,694)	(4,127)
Other accrued expenses	2,797	(913)
Net Cash Provided (Used) by Operating Activities	2,260	(3,772)
INVESTING ACTIVITIES
Payments to acquire property, plant, and equipment	(1,851)	(2,185)
Proceeds from sales of property, plant, and equipment	50	1
Proceeds from insurance recoveries	94	0
Proceeds from sale of assets held for sale	0	1,777
Investment in promotional displays	(1,243)	(1,456)
Net Cash Used by Investing Activities	(2,950)	(1,863)
FINANCING ACTIVITIES
Payments of long-term debt	(224)	(185)
Proceeds from issuance of common stock	4,186	0
Tax benefit from stock-based compensation	197	0
Net Cash Provided (Used) by Financing Activities	4,159	(185)
Net Increase (Decrease) in Cash And Cash Equivalents	3,469	(5,820)
Cash And Cash Equivalents, Beginning of Period	96,971	66,620
Cash And Cash Equivalents, End of Period	$ 100,440	$ 60,800