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Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 12 Months Ended
Apr. 30, 2015
Apr. 30, 2014
Apr. 30, 2013
Cash Flows from Operating Activities      
Net earnings $ 3,640 $ 4,003 $ 3,681
Adjustments to reconcile net earnings to net cash provided by operating activities:      
Depreciation 2,615 2,549 2,653
Bad debt provision 55 116 34
Stock based compensation expense 196 238 239
Provision (benefit) for deferred income tax expense (513) 864 (526)
Change in assets and liabilities:      
(Increase) decrease in receivables (5,688) 2,295 (2,674)
(Increase) decrease in inventories (807) 1,265 (1,443)
Increase (decrease) in accounts payable and other accrued expenses 3,008 (2,862) 2,604
Increase (decrease) in deferred revenue 79 (351) (874)
Other, net (294) (48) 133
Net cash provided by operating activities 2,291 8,069 3,827
Cash Flows from Investing Activities      
Capital expenditures (2,568) (2,021) (2,405)
(Increase) decrease in restricted cash (1,908) 323 13
Net cash used in investing activities (4,476) (1,698) (2,392)
Cash Flows from Financing Activities      
Dividends paid (1,234) (1,122) (1,035)
Dividends paid to noncontrolling interest in subsidiaries (38) (38) (744)
Increase (decrease) in short-term borrowings and interest rate swaps 1,805 (3,847) 181
Proceeds from long-term debt   5,000  
Payments on capital leases     (36)
Payment toward purchase of noncontrolling interest in subsidiary (888) (1,780)  
Payments on long-term debt (421) (3,854) (200)
Net proceeds from exercise of stock options (including tax benefit) 33 92 116
Net cash used in financing activities (743) (5,549) (1,718)
Effect of exchange rate changes on cash, net (276) (385) (94)
(Decrease) Increase in Cash and Cash Equivalents (3,204) 437 (377)
Cash and Cash Equivalents at Beginning of Year 6,248 5,811 6,188
Cash and Cash Equivalents at End of Year 3,044 6,248 5,811
Supplemental Disclosure of Cash Flow Information      
Interest paid 323 413 374
Income taxes paid $ 1,873 2,585 $ 1,722
Purchase of noncontrolling interest in subsidiary - Other accrued expenses and other non-current liabilities   $ 1,775