Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Nov. 30, 2020	May 31, 2019
Operating activities:
Net income	$ 851	$ 1,917
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	377	259
Bad debt expense		3
Loss on sale of property		102
Net gain on trading securities	553	80
(Increase) decrease in:
Trade accounts receivable	1,634	2,175
Inventory	(71)	(2,472)
Prepaid expenses and other assets	716	(729)
Operating lease right-of-use assets	417
Increase (decrease) in:
Trade accounts payable	666	(2,266)
Accrued expenses and other current liabilities	(723)	(737)
Operating lease liabilities	(524)
Net cash provided by (used in) operating activities	3,896	(1,668)
Investing activities:
Additions to property, equipment, and leasehold improvements	(179)	(2,393)
Proceeds from sale of property		7,075
Sale of marketable securities, trading	24	1,388
Net change in liabilities for short sales of trading securities	286	2,167
Net cash provided by investing activities	131	8,237
Financing activities:
(Payments) borrowings on revolving credit facility, net	(2,187)	513
Borrowings on Construction Loan		1,701
Repayments on long-term debt		(5,125)
Preferred stock dividend	(19)	(19)
Bank overdraft	(867)	104
Net cash used in financing activities	(3,073)	(2,826)
Effect of foreign currency exchange rate changes on cash and cash equivalents	(82)	(212)
Net increase in cash, cash equivalents, and restricted cash	872	3,531
Cash, cash equivalents, and restricted cash - beginning of period	8,995	5,347
Cash, cash equivalents, and restricted cash - end of period	9,867	8,878
Supplemental disclosures of cash flow information:
Cash paid for interest	$ 48	$ 122