CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Cash flows from operating activities:
Net (loss) income	$ (421,000)	$ 538,000
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation and amortization	983,000	1,135,000
Loss from investments in unconsolidated entities, net	743,000	101,000
Distributed earnings from unconsolidated entities	60,000	274,000
Loss on derecognition of gamma knife and related assets	663,000	0
Accrued interest from notes receivable	0	(4,000)
Accretion of asset retirement obligations	20,000	26,000
Deferred income taxes	(361,000)	(161,000)
Changes in:
Accounts receivable	449,000	124,000
Elekta refund due	0	12,000
Income taxes receivable/payable	(165,000)	64,000
Other current assets	(87,000)	4,000
Accounts payable and accrued expenses	(81,000)	122,000
Deferred revenue	485,000	113,000
Net cash provided by operating activities	2,288,000	2,348,000
Cash flows from investing activities:
Repayment of amounts advanced to unconsolidated entities	0	64,000
Advances to unconsolidated entities	(1,557,000)	(593,000)
Advances made under loans to unconsolidated entities	(436,000)	0
Purchase of gamma knife equipment	(570,000)	(46,000)
Investments in unconsolidated entities	(4,000)	(20,000)
Principal payments received under sales type lease	198,000	0
Net cash used in investing activities	(2,369,000)	(595,000)
Cash flows from financing activities:
Repayment of capital lease obligations	(1,084,000)	(1,031,000)
Net cash used in financing activities	(1,084,000)	(1,031,000)
Net change in cash and cash equivalents	(1,165,000)	722,000
Cash and cash equivalents - beginning of year	2,684,000	1,962,000
Cash and cash equivalents - end of year	1,519,000	2,684,000
Cash paid for:
Interest	122,000	143,000
Income tax	339,000	0
Supplemental disclosure of noncash investing and financing activities:
Increase in gamma knife equipment through a capital lease obligation	833,000	0
Distribution from unconsolidated entity recorded as short term loan receivable	0	295,000
Distributions accrued from unconsolidated entities	20,000	0
Fixed asset additions included in accrued expenses	$ 100,000	$ 0