Consolidated Statements of Income and Retained Earnings - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Income Statement [Abstract]
Leasing revenue	$ 5,075,000	$ 4,810,000
Expenses:
Operating	922,000	846,000
General and administrative	1,337,000	1,420,000
Total expenses	2,259,000	2,266,000
Income from continuing operations before income taxes	2,816,000	2,544,000
Income tax expense:
Current	765,000	677,000
Deferred	9,000	28,000
Total Income tax expense	774,000	705,000
Income from continuing operations	2,042,000	1,839,000
Loss on sale of discontinued operations, net of tax (Note 8)	(255,000)
Net income	1,787,000	1,839,000
Retained earnings, beginning	6,325,000	6,334,000
Dividends on common stock based on 6,599,912 shares outstanding	(1,848,000)	(1,848,000)
Retained earnings, ending	$ 6,264,000	$ 6,325,000
Basic income (loss) per common share based upon 6,599,912 shares outstanding
Continuing operations	$ 0.31	$ 0.28
Discontinued operations	(0.04)
Total basic income per common share	$ 0.27	$ 0.28