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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
 6 Months Ended
Oct. 31, 2021
Oct. 31, 2020
Cash flows from operating activities:    
Net loss $ (4,389) $ (773)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation 1,396 1,346
Bad debt provision (2) 93
Stock-based compensation expense 366 256
Deferred income taxes 72 257
Change in assets and liabilities:    
Receivables (2,971) (4,243)
Inventories (1,603) (794)
Income tax receivable 180 (503)
Accounts payable and other accrued expenses 3,145 4,379
Deferred revenue (72) 260
Other, net (2,193) (794)
Net cash used in operating activities (6,071) (516)
Cash flows from investing activities:    
Capital expenditures (930) (1,292)
Net cash used in investing activities (930) (1,292)
Cash flows from financing activities:    
Dividends paid to non-controlling interest in subsidiaries 0 (57)
Proceeds from short-term borrowings 28,641 37,599
Repayments on short-term borrowings (21,774) (34,726)
Payments on long-term lease obligations (10) (9)
Net proceeds from exercise of stock options 0 (15)
Net cash provided by financing activities 6,857 2,792
Effect of exchange rate changes on cash, cash equivalents and restricted cash (55) 41
(Decrease) increase in cash, cash equivalents and restricted cash (199) 1,025
Cash, cash equivalents and restricted cash, beginning of period 5,731 5,215
Cash, cash equivalents and restricted cash, end of period $ 5,532 $ 6,240