Investment in Equity Securities (Details Textual) - USD ($)	3 Months Ended			9 Months Ended
	Sep. 30, 2015	Jun. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Aug. 04, 2015	Dec. 31, 2014
Schedule of Cost-method Investments [Line Items]
Equity Method Investments	$ 605,000			$ 605,000			$ 2,709,000
Non Refundable Deposits	5,000,000			5,000,000
Equity Method Investment, Ownership Percentage						0.56%
Other than Temporary Impairment Losses, Investments	0		$ 0	2,114,000	$ 0
Valuation Allowance	0			0
Mevion Medical Systems Inc [Member]
Schedule of Cost-method Investments [Line Items]
Equity Method Investments	605,000			605,000			$ 2,709,000
Investments, Fair Value Disclosure	600,000	$ 600,000		600,000
Other than Temporary Impairment Losses, Investments	2,114,000	$ 2,114,000		2,114,000
Mevion Medical Systems Inc [Member] | P WERM [Member]
Schedule of Cost-method Investments [Line Items]
Investments, Fair Value Disclosure	$ 600,000			$ 600,000
Investor [Member]
Schedule of Cost-method Investments [Line Items]
Equity Method Investments						$ 200,000,000