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Consolidated Statements of Cash Flows (Unaudited) (USD $)
In Thousands, unless otherwise specified
 6 Months Ended
Oct. 31, 2012
Oct. 31, 2011
Cash flows from operating activities:    
Net earnings (loss) $ 1,495 $ (48)
Adjustments to reconcile net earnings (loss) to net cash provided by operating activities:    
Depreciation 1,317 1,343
Bad debt provision 23 16
Provision for deferred income tax expense (benefit) (96) (124)
Increase in prepaid income taxes   (103)
(Increase) decrease in receivables (1,647) 3,851
(Increase) decrease in inventories (664) 96
Increase (decrease) in accounts payable and other accrued expenses 3,348 (2,475)
Decrease in deferred revenue (297) (47)
Other, net (1,225) (583)
Net cash provided by operating activities 2,254 1,926
Cash flows from investing activities:    
Capital expenditures (729) (751)
Decrease (increase) in restricted cash 65 (323)
Net cash used in investing activities (664) (1,074)
Cash flows from financing activities:    
Dividends paid (517) (516)
Dividends paid to minority interest (139)  
(Decrease) increase in short-term borrowings (1,122) 738
Payments on long-term debt (100) (100)
Payments on capital leases (36) (40)
Net proceeds from exercise of stock options (including tax benefit) 67  
Net cash (used in) provided by financing activities (1,847) 82
Effect of exchange rate changes on cash (53) (124)
(Decrease) increase in cash and cash equivalents (310) 810
Cash and cash equivalents, beginning of period 6,188 2,402
Cash and cash equivalents, end of period $ 5,878 $ 3,212