Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jul. 31, 2013	Jul. 31, 2012
Cash flows from operating activities:
Net earnings	$ 1,617	$ 688
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation	631	658
Bad debt provision	29	25
Non-cash stock option expense	59	64
Provision for deferred income tax expense	(35)	(37)
Decrease in receivables	1,103	1,273
Decrease in inventories	869	43
(Decrease) increase in accounts payable and other accrued expenses	(2,105)	768
Increase (decrease) in deferred revenue	160	(456)
Other, net	(523)	(296)
Net cash provided by operating activities	1,805	2,730
Cash flows from investing activities:
Capital expenditures	(528)	(434)
Decrease in restricted cash	72	51
Net cash used in investing activities	(456)	(383)
Cash flows from financing activities:
Dividends paid	(260)	(258)
Decrease in short-term borrowings and interest rate swap	(1,896)	(315)
Proceeds from long-term debt	5,000
Payments on long-term debt	(3,504)	(50)
Payments on capital leases		(21)
Payment toward purchase of noncontrolling interest in subsidiary	(1,780)
Net proceeds from exercise of stock options (including tax benefit)	57	32
Net cash used in financing activities	(2,383)	(612)
Effect of exchange rate changes on cash	(369)	(203)
(Decrease) increase in cash and cash equivalents	(1,403)	1,532
Cash and cash equivalents, beginning of period	5,811	6,188
Cash and cash equivalents, end of period	4,408	7,720
Supplemental Disclosure of Cash Flow Information
Purchase of noncontrolling interest in subsidiary - other accrued expenses and other non-current liabilities	$ 1,775