Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Jul. 31, 2022	Jul. 31, 2021
Cash flows from operating activities:
Net loss	$ (719)	$ (1,307)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation	725	693
Bad debt provision	23	3
Stock-based compensation expense	172	216
Deferred income taxes	23	37
Change in assets and liabilities:
Receivables	516	(839)
Inventories	(1,304)	(1,335)
Accounts payable and other accrued expenses	(2,117)	1,048
Deferred revenue	10,587	(568)
Other, net	(4,221)	276
Net cash provided by (used in) operating activities	3,685	(1,776)
Cash flows from investing activities:
Capital expenditures	(390)	(484)
Net cash used in investing activities	(390)	(484)
Cash flows from financing activities:
Proceeds from short-term borrowings	4,431	12,303
Repayments on short-term borrowings	(6,019)	(10,277)
Proceeds from sale-leaseback financing transaction	13,456	0
Payments on sale-leaseback financing transaction	(140)	0
Payments on long-term lease obligations	(58)	(5)
Net cash provided by financing activities	11,670	2,021
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(325)	(25)
Increase (decrease) in cash, cash equivalents and restricted cash	14,640	(264)
Cash, cash equivalents and restricted cash, beginning of period	6,894	5,731
Cash, cash equivalents and restricted cash, end of period	$ 21,534	$ 5,467