Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $)	3 Months Ended
	Aug. 31, 2014	Aug. 31, 2013
Cash flows from operating activities:
Consolidated net income	$ 46,501	$ 38,283
Adjustments to reconcile consolidated net income to net cash provided by (used in) operating activities:
Depreciation and amortization	4,809	3,377
Unrealized (gain) loss from marketable securities, net	(6,080)	1,840
Deferred income taxes	24,000	14,000
Changes in operating assets and liabilities:
Accounts receivable	961,317	(91,981)
Other receivables	2,825	3,609
Prepaid expenses	36,508	(26,646)
Prepaid and recoverable income taxes	(6,198)	2,880
Accounts and other payables and accrued expenses and other current liabilities	327,591	(136,727)
Advances from customers	(15,289)	(23,441)
Net cash provided by (used in) operating activities	1,375,984	(214,806)
Cash flows from investing activities:
Proceeds from maturities of marketable securities	747,000	993,000
Purchases of marketable securities	(745,000)	(996,000)
Purchases of equipment and leasehold improvements	(7,341)	(3,853)
Net cash used in investing activities	(5,341)	(6,853)
Cash flows from financing activities:
Distributions to noncontrolling interest	(1,897)	(3,212)
Net cash used in financing activities	(1,897)	(3,212)
Net increase (decrease) in cash and cash equivalents	1,368,746	(224,871)
Cash and cash equivalents at beginning of period	2,841,967	1,881,161
Cash and cash equivalents at end of period	4,210,713	1,656,290
Supplemental disclosures of cash flow data:
Income taxes paid	$ 16,000	$ 3,000