Taxes (Details) - USD ($)	3 Months Ended				6 Months Ended	9 Months Ended	12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2021	Sep. 30, 2021	Dec. 31, 2021	Dec. 31, 2020
Current taxes [Abstract]
Federal							$ 228,000	$ 211,000
State							192,000	95,000
Current taxes							420,000	306,000
Deferred taxes [Abstract]
Federal							0	12,000
State							0	5,000
Deferred taxes							0	17,000
Income tax provision	$ (80,000)	$ 16,000	$ 232,000	$ 252,000	$ 484,000	$ 500,000	420,000	323,000
Reconciliation of Tax Provision (Benefit) [Abstract]
Income tax at the federal statutory rate							(130,000)	180,000
State income tax, net of federal taxes							(106,000)	52,000
Permanent differences and other							(67,000)	16,000
Change in estimated effective state tax rate							2,000	(4,000)
Change in valuation allowance							721,000	79,000
Income tax provision	(80,000)	$ 16,000	$ 232,000	$ 252,000	$ 484,000	$ 500,000	420,000	323,000
Deferred tax asset [Abstract]
Basis differences in unconsolidated entities, including advances and loans to those entities.	587,000						587,000	561,000
Excess of book depreciation over tax depreciation	0						0	192,000
Net intangible assets and other capitalized costs	102,000						102,000	0
Net operating loss	66,000						66,000	34,000
Net effect of conversion from the accrual basis of accounting to the cash basis of accounting for tax purposes primarily related to accounts receivable, prepaid expense, deferred revenue, and accounts payable	45,000						45,000	0
Valuation allowance	(800,000)						(800,000)	(79,000)
Deferred tax assets, gross	0						0	708,000
Deferred tax liability [Abstract]
Deferred gain on disposal of gamma knife	0						0	(634,000)
Net effect of conversion from the accrual basis of accounting to the cash basis of accounting for tax purposes primarily related to accounts receivable, prepaid expense, deferred revenue, and accounts payable	0						0	(74,000)
Net deferred tax asset	$ 0						$ 0	$ 0