Boca Oncology Partners (Details)			3 Months Ended		6 Months Ended
	Jun. 30, 2012 USD ($)	Jan. 31, 2012 USD ($)	Jun. 30, 2016 USD ($) ft²	Jun. 30, 2015 USD ($)	Jun. 30, 2016 USD ($) ft²	Jun. 30, 2015 USD ($)	Dec. 31, 2015 USD ($)	Jun. 30, 2011 USD ($)
Schedule of Cost-method Investments [Line Items]
Investments in unconsolidated entities			$ 375,000		$ 375,000		$ 364,000
Condensed Income Statement Information [Abstract]
Income (loss) from investments in unconsolidated entities			$ 183,000	$ 25,000	$ 338,000	$ (11,000)
USNC [Member] | Boca West IMP [Member]
Schedule of Cost-method Investments [Line Items]
Share of guarantee in mortgage			10.00%		10.00%
Share of guarantee in outstanding mortgage			50.00%		50.00%
Mortgage term of guarantee					10 years
Original balance of mortgage			$ 3,000,000		$ 3,000,000
Outstanding balance on mortgage			$ 2,580,000		$ 2,580,000
Boca Oncology Partners, LLC [Member]
Schedule of Cost-method Investments [Line Items]
Area of building | ft²			6,000		6,000
Ownership percentage		11.25%
Amount loaned to related parties	$ 28,000	$ 56,250
Debt maturity period		5 years
Company loan interest rate		7.00%
Boca Oncology Partners, LLC [Member] | USNC [Member]
Schedule of Cost-method Investments [Line Items]
Ownership percentage	15.40%
Boca Oncology Partners RE, LLC ("BOPRE") [Member]
Schedule of Cost-method Investments [Line Items]
Investments in unconsolidated entities			$ 139,000		$ 139,000		139,000
Ownership percentage								20.00%
Ownership percentage by outside investors	31.50%
Condensed Income Statement Information [Abstract]
Rental income			0	0	0	0
Net loss			(1,000)	(1,000)	(1,000)	(1,000)
Income (loss) from investments in unconsolidated entities			0	$ 0	0	$ 0
Equity Method Investment Summarized Financial Information Balance Sheet [Abstract]
Current assets			39,000		39,000		40,000
Noncurrent assets			837,000		837,000		837,000
Total assets			876,000		876,000		877,000
Current liabilities			0		0		0
Noncurrent liabilities			0		0		0
Equity			876,000		876,000		877,000
Total liabilities and equity			$ 876,000		$ 876,000		$ 877,000
Boca Oncology Partners RE, LLC ("BOPRE") [Member] | Boca West IMP [Member]
Schedule of Cost-method Investments [Line Items]
Ownership percentage	23.75%
Additional investor purchased	3.75%
BOP and BOPRE [Member]
Schedule of Cost-method Investments [Line Items]
Area of building | ft²			32,000		32,000
Investments in unconsolidated entities								$ 225,000
Additional investor purchased		50.00%
Ownership percentage by outside investors		88.75%
BOP and BOPRE [Member] | USNC [Member]
Schedule of Cost-method Investments [Line Items]
Ownership percentage								22.50%