Taxes (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Reconciliation of Tax Provision (Benefit)
Income tax at the federal statutory rate	$ 220,000	$ 273,000
State income tax, net of federal taxes	21,000	26,000
Permanent differences	14,000	11,000
Other	(3,000)	(16,000)
Change in valuation allowance	0	(52,000)
Income tax (benefit) provision	252,000	242,000
Deferred tax asset [Abstract]
Net operating loss	463,000	667,000
Basis difference in unconsolidated entities	32,000	0
Deferred tax assets, gross	495,000	667,000
Deferred tax liability [Abstract]
Basis difference in unconsolidated entities	0	(61,000)
Deferred gain on disposal of gamma knife	(716,000)	(716,000)
Excess of depreciation over book depreciation	(82,000)	(40,000)
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	(191,000)	(92,000)
Net deferred tax liability	(494,000)	$ (242,000)
Loss Carryforwards Expiration [Abstract]
Operating loss carryforwards	$ 1,239,000