CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
CASH FLOWS FROM OPERATING ACTIVITIES:
Net (loss) income attributable to the Company	$ (11,116)	$ 5,190,893
Adjustments to reconcile net (loss) income attributable to the Company to net cash used in operating activities:
Depreciation expense	3,849	3,849
Income from other investments, net, excluding impairment losses	(77,855)	(217,703)
Equity loss from operations of residential real estate partnership	0	143,889
Equity gain from sale of residential real estate partnership, net	0	(5,473,887)
Net (gains) losses from investments in marketable securities	(180,474)	20,761
Net gain attributable to noncontrolling interest	2,808	9,250
Deferred income tax (benefit) expense	(4,472)	27,205
Changes in assets and liabilities:
Other assets and other receivables	(212,394)	53,233
Accounts payable, accrued expenses and other liabilities	13,619	(43,594)
Total adjustments	(454,919)	(5,476,997)
Net cash used in operating activities	(466,035)	(286,104)
CASH FLOWS FROM INVESTING ACTIVITIES:
Net proceeds from sales and redemptions of marketable securities	645,931	993,516
Investments in marketable securities	(696,561)	(1,323,552)
Distribution from investment in residential real estate partnership	0	7,250,000
Distributions from other investments	175,008	579,304
Contributions to other investments	(328,108)	(344,953)
Distribution from affiliate	220,899	193,286
Purchases and improvements of properties	(218)	(6,677)
Net cash provided by investing activities	16,951	7,340,924
CASH FLOWS FROM FINANCING ACTIVITIES:
Margin borrowings, net of repayments	117,055	10,225,318
Dividend paid	(506,646)	(2,533,230)
Repayment of note payable to affiliate	(340,000)	(210,000)
Proceeds from stock options exercised	0	91,895
Net cash (used in) provided by financing activities	(729,591)	7,573,983
Net (decrease) increase in cash and cash equivalents	(1,178,675)	14,628,803
Cash and cash equivalents at beginning of the period	19,738,174	5,223,995
Cash and cash equivalents at end of the period	18,559,499	19,852,798
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Cash paid during the year for interest	$ 15,000	$ 21,000