Consolidated Statements Of Cash Flows (USD $) In Thousands	3 Months Ended
Jul. 31, 2011	Jul. 31, 2010
Cash flows from operating activities:
Net earnings	$ 108	$ 724
Adjustments to reconcile net earnings to net cash used in operating activities:
Depreciation	677	589
Bad debt provision	6	43
Provision for deferred income tax expense	(62)	(29)
Decrease (increase) in receivables	58	(1,299)
Decrease in inventories	205	124
Decrease in accounts payable and other accrued expenses	(1,315)	(441)
Increase in deferred revenue	343	128
Other, net	(907)	73
Net cash used in operating activities	(887)	(88)
Cash flows from investing activities:
Capital expenditures	(304)	(2,179)
(Increase) decrease in restricted cash	(355)	23
Net cash used in investing activities	(659)	(2,156)
Cash flows from financing activities:
Dividends paid	(258)	(257)
Increase in short-term borrowings	2,084	2,624
Payments on long-term debt	(50)
Payments on capital leases	(20)	(24)
Net proceeds from exercise of stock options (including tax benefit)		(1)
Net cash provided by financing activities	1,756	2,342
Effect of exchange rate changes on cash	40	(8)
Increase in cash and cash equivalents	250	90
Cash and cash equivalents, beginning of period	2,402	1,722
Cash and cash equivalents, end of period	$ 2,652	$ 1,812

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