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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
 3 Months Ended
Jul. 31, 2023
Jul. 31, 2022
Cash flows from operating activities:    
Net earnings (loss) $ 2,515 $ (719)
Adjustments to reconcile net earnings (loss) to net cash provided by operating activities:    
Depreciation 718 725
Bad debt provision 125 23
Stock-based compensation expense 183 172
Deferred income taxes 46 23
Change in assets and liabilities:    
Receivables 3,496 516
Inventories (237) (1,304)
Accounts payable and other accrued expenses (226) (2,117)
Deferred revenue 2,970 10,587
Other, net (1,418) (4,221)
Net cash provided by operating activities 8,172 3,685
Cash flows from investing activities:    
Capital expenditures (1,654) (390)
Net cash used in investing activities (1,654) (390)
Cash flows from financing activities:    
Proceeds from short-term borrowings 40,597 4,431
Repayments on short-term borrowings (39,130) (6,019)
Proceeds from sale-leaseback financing transaction 0 13,456
Payments on sale-leaseback financing transaction (157) (140)
Payments on long-term lease obligations (4) (58)
Net cash provided by financing activities 1,306 11,670
Effect of exchange rate changes on cash, cash equivalents and restricted cash (71) (325)
Increase in cash, cash equivalents and restricted cash 7,753 14,640
Cash, cash equivalents and restricted cash, beginning of period 13,815 6,894
Cash, cash equivalents and restricted cash, end of period $ 21,568 $ 21,534