Condensed Consolidated Statements of Cash Flows - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Cash flows from operating activities:
Income from continuing operations	$ 383,000	$ 563,000
Adjustments to reconcile income from continuing operations to net cash provided by operating activities, continuing operations:
Depreciation	22,000	23,000
Deferred income taxes	(44,000)	(15,000)
Income taxes	172,000	192,000
Other, net changes in prepaids, property tax payable and other	93,000	38,000
Net cash provided by operating activities, continuing operations	626,000	801,000
Continuing operations:
Deferred revenue	26,000	24,000
Discontinued operations:
Cash used to settle obligations	(53,000)	(50,000)
Noncash adjustment to gain on sale of discontinued operations	13,000	15,000
Net cash (used in) discontinued operations	(40,000)	(35,000)
Net cash (used in) investing activities	(14,000)	(11,000)
Cash flows used in financing activities, payment of dividends	(462,000)	(462,000)
Increase in cash and cash equivalents	150,000	328,000
Cash and cash equivalents, beginning	1,642,000	1,262,000
Cash and cash equivalents, ending	1,792,000	1,590,000
Supplemental disclosure:
Cash paid for income taxes	$ 7,000	$ 8,000