Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Cash flows from operating activities:
Income from continuing operations	$ 1,839,000	$ 1,983,000
Adjustments to reconcile income from continuing operations to net cash provided by operating activities, continuing operations:
Depreciation	86,000	93,000
Deferred income taxes	28,000	(76,000)
Deferred revenue, Parcel 20	(199,000)
Changes in assets and liabilities:
Prepaid and other	(21,000)	57,000
Property taxes	67,000	53,000
Other	(51,000)	(43,000)
Net cash provided by operating activities, continuing operations	1,749,000	2,067,000
Cash flows from investing activities, continuing operations, proceeds from
Deferred revenue, Parcel 20		102,000
Discontinued operations:
Cash used to settle obligations	(132,000)	(553,000)
Noncash adjustment to gain on sale of discontinued operations	32,000	150,000
Discontinuing operations	(100,000)	(403,000)
Net cash (used in) investing activities	(100,000)	(301,000)
Cash flows from financing activities, payment of dividends	(1,848,000)	(1,386,000)
Increase (decrease) in cash and cash equivalents	(199,000)	380,000
Cash and cash equivalents, beginning	1,642,000	1,262,000
Cash and cash equivalents, ending	1,443,000	1,642,000
Supplemental disclosures:
Cash paid for income taxes	$ 683,000	$ 696,000