Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Cash flows from operating activities:
Income from continuing operations	$ 2,042,000	$ 1,839,000
Adjustments to reconcile income from continuing operations to net cash provided by operating activities, continuing operations:
Depreciation	86,000	86,000
Deferred income taxes	9,000	28,000
Deferred revenue, Parcel 20		(199,000)
Changes in assets and liabilities:
Income taxes	64,000
Prepaid and other	(102,000)	(21,000)
Property taxes	(17,000)	67,000
Other	16,000	(51,000)
Net cash provided by operating activities, continuing operations	2,098,000	1,749,000
Discontinued operations:
Loss on sale of discontinued operation	(255,000)
Cash used to settle obligations	(112,000)	(132,000)
Noncash adjustment to loss on sale of discontinued operations	150,000	32,000
Net cash (used in) investing activities	(217,000)	(100,000)
Cash flows from financing activities, payment of dividends	(1,848,000)	(1,848,000)
Increase (decrease) in cash and cash equivalents	33,000	(199,000)
Cash and cash equivalents, beginning	1,443,000	1,642,000
Cash and cash equivalents, ending	1,476,000	1,443,000
Supplemental disclosures:
Cash paid for income taxes	$ 619,000	$ 683,000