Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	6 Months Ended
	Nov. 30, 2023	Nov. 30, 2022
Cash flows from operating activities:
Consolidated net income	$ 1,058,292	$ 1,194,631
Adjustments to reconcile consolidated net income to net cash provided by operating activities:
Depreciation and amortization	114,493	123,269
Unrealized (gain) loss on marketable securities, net	(10,608)	11,480
Deferred income taxes	61,000	437,000
Non-cash lease recovery	(3,083)	(20,724)
Non-cash stock-based compensation expense	51,054	138,432
Changes in operating assets and liabilities:
Accounts receivable	1,053,057	868,689
Other receivables	10,309	(38,240)
Prepaid expenses	(248,096)	(129,599)
Prepaid and recoverable income taxes		31,795
Other assets	17,011	14,498
Accounts payable, other payables, accrued expenses and other current liabilities	(395,640)	(193,375)
Income taxes payable	42,026	5,730
Advances from customers	(42,855)	37,501
Legal settlement payable		(597,566)
Net cash provided by operating activities	1,706,960	1,883,521
Cash flows from investing activities:
Purchases of certificates of deposit	(500,000)	(500,000)
Maturities of certificates of deposit	490,000
Purchases of equipment and leasehold improvements		(3,584)
Net cash used in investing activities	(10,000)	(503,584)
Cash flows from financing activities:
Net repayments on credit facility		(61,882)
Purchases of treasury stock		(116,426)
Net cash used in financing activities		(178,308)
Net increase in cash and cash equivalents	1,696,960	1,201,629
Cash and cash equivalents at beginning of period	7,382,320	6,490,158
Cash and cash equivalents at end of period	9,079,280	7,691,787
Supplemental disclosures of cash flow data:
Income taxes paid	306,000	44,000
Interest paid	52,000	37,000
Supplemental disclosures of non-cash information:
Right-of-use asset obtained in exchange for lease liabilities	$ 298,000