CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss attributable to the Company	$ (636,811)	$ (839,006)
Adjustments to reconcile net loss attributable to the Company to net cash used in operating activities:
Depreciation expense	7,699	7,699
Net income from other investments, excluding impairment losses	(132,550)	(172,267)
Other than temporary impairment losses from other investments	0	315,000
Loss on sale of land	29,210	0
Equity loss from operations of residential real estate partnership	301,000	0
Net (gains) losses from investments in marketable securities	(191,842)	385,507
Net income (loss) attributable to noncontrolling interest	3,732	(15,128)
Deferred income taxes	34,887	(105,354)
Changes in assets and liabilities:
Other assets and other receivables	(53,660)	(10,922)
Accounts payable, accrued expenses and other liabilities	78,352	(231,516)
Total adjustments	76,828	173,019
Net cash used in operating activities	(559,983)	(665,988)
CASH FLOWS FROM INVESTING ACTIVITIES:
Net proceeds from sales and redemptions of marketable securities	1,233,705	839,547
Investments in marketable securities	(464,032)	(929,990)
Distributions from other investments	249,580	394,423
Contributions to other investments	(437,035)	(205,472)
Proceeds from collections of mortgage loans, notes and other receivables	124	1,200,000
Distribution from affiliate	138,062	220,899
Purchases and improvements of properties	(10,253)	0
Proceeds from sale of property	129,926	0
Additions in mortgage loans, notes, and other receivables	(3,433)	0
Net cash provided by investing activities	836,644	1,519,407
CASH FLOWS FROM FINANCING ACTIVITIES:
Margin borrowings, net of repayments	0	(6,007,878)
Dividend paid	(503,624)	(506,646)
Repayment of note payable to affiliate	(250,000)	(350,000)
Stock options exercised	130,080	0
Purchase of treasury shares	0	(66,392)
Net cash used in financing activities	(623,544)	(6,930,916)
Net decrease in cash and cash equivalents	(346,883)	(6,077,497)
Cash and cash equivalents at beginning of the period	4,883,923	15,382,596
Cash and cash equivalents at end of the period	4,537,040	9,305,099
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Cash paid during the period for interest	8,000	19,000
NONCASH INVESTING AND FINANCING ACTIVITIES:
Retirement of treasury stock during the period	66,392	0
Accrual of construction costs incurred in period but not paid (Vermont)	194,918	0
Mortgage receivable on sale of land during the period (Rhode Island)	$ 49,876	$ 0