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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
 6 Months Ended
Oct. 31, 2020
Oct. 31, 2019
Cash flows from operating activities:    
Net loss $ (773) $ (1,665)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:    
Depreciation 1,346 1,292
Bad debt provision 93 72
Stock based compensation expense 256 115
Deferred income taxes 257 1,727
Change in assets and liabilities:    
Receivables (5,784) 1,171
Inventories (794) 2,428
Income tax receivable (503) 0
Accounts payable and other accrued expenses 4,379 (223)
Deferred revenue 260 433
Other, net 747 (854)
Net cash (used in) provided by operating activities (516) 4,496
Cash flows from investing activities:    
Capital expenditures (1,292) (715)
Net cash used in investing activities (1,292) (715)
Cash flows from financing activities:    
Dividends paid 0 (1,045)
Dividends paid to noncontrolling interest in subsidiaries (57) (89)
Proceeds from short-term borrowings 37,599 31,456
Repayments on short-term borrowings (34,726) (34,209)
Payments on long-term debt and lease obligations (9) (1,273)
Net proceeds from exercise of stock options (15) (14)
Net cash provided by (used in) financing activities 2,792 (5,174)
Effect of exchange rate changes on cash, cash equivalents and restricted cash 41 (165)
Increase (decrease) in cash, cash equivalents and restricted cash 1,025 (1,558)
Cash, cash equivalents and restricted cash, beginning of period 5,215 11,156
Cash, cash equivalents and restricted cash, end of period $ 6,240 $ 9,598