CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($)	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Cash flows from operating activities:
Net income	$ 375,000	$ 111,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	471,000	466,000
(Income) loss from investment in unconsolidated entities	(338,000)	11,000
Accretion of asset retirement obligations	12,000	23,000
Change in guarantee liability	(4,000)	0
Deferred income taxes	131,000	67,000
Changes in:
Accounts receivable	478,000	5,000
Elekta refund due	0	115,000
Income tax payable	92,000	0
Other current assets	18,000	(9,000)
Accounts payable and accrued expenses	(28,000)	49,000
Deferred revenue	278,000	402,000
Net cash provided by operating activities	1,485,000	1,240,000
Cash flows from investing activities:
Repayment of amounts advanced to unconsolidated entities	20,000	0
Advances - short term receivable and note receivable	0	(245,000)
Deposit for gamma knife equipment	(248,000)	0
Purchase of leasehold improvements	0	(341,000)
Decrease (increase) in due from related parties	21,000	(94,000)
Distributions from, investments in unconsolidated entities	306,000	0
Net cash provided by (used in) investing activities	99,000	(680,000)
Cash flows from financing activities:
Repayment of capital lease obligations	(459,000)	(353,000)
Net cash used in financing activities	(459,000)	(353,000)
Net change in cash and cash equivalents	1,125,000	207,000
Cash and cash equivalents - beginning of period	1,068,000	1,053,000
Cash and cash equivalents - end of period	2,193,000	1,260,000
Cash paid for:
Interest	80,000	96,000
Supplemental disclosure of noncash investing and financing activities:
Increase in investment in unconsolidated entities through recording of guarantee liability	0	25,000
Increase in guarantee liability recorded	$ 0	$ 15,000