Taxes (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Current taxes [Abstract]
Federal	$ 56,000	$ 211,000
State	64,000	95,000
Current taxes	120,000	306,000
Deferred taxes [Abstract]
Federal	0	12,000
State	0	5,000
Deferred taxes	0	17,000
Income tax provision	120,000	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	(103,000)	52,000
Permanent differences and other	(72,000)	16,000
Change in estimated effective state tax rate	2,000	(4,000)
Change in valuation allowance	423,000	79,000
Income tax provision	120,000	323,000
Deferred tax asset [Abstract]
Basis differences in unconsolidated entities, including advances and loans to those entities.	587,000	561,000
Excess of book depreciation over tax depreciation	306,000	192,000
Net intangible assets and other capitalized costs	102,000	0
Net operating loss	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	44,000	0
Valuation allowance	(502,000)	(79,000)
Deferred tax assets, gross	603,000	708,000
Deferred tax liability [Abstract]
Deferred gain on disposal of gamma knife	(603,000)	(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	(74,000)
Net deferred tax asset	$ 0	$ 0