Basis of Presentation (Details Textual) € in Millions	1 Months Ended		3 Months Ended			9 Months Ended		12 Months Ended
	May. 31, 2014 USD ($)	May. 31, 2014 EUR (€)	Sep. 30, 2015 USD ($)	Jun. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)	Dec. 31, 2014 USD ($)	Aug. 04, 2015
Basis Of Presentation [Line Items]
Equity Method Investment, Ownership Percentage									0.56%
Foreign Currency Transaction Gain, before Tax							$ 161,000
Proceeds from Divestiture of Interest in Consolidated Subsidiaries						$ 0	768,000
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent, Total								$ 779,000
Other than Temporary Impairment Losses, Investments			$ 0		$ 0	2,114,000	$ 0
Mevion Medical Systems Inc [Member]
Basis Of Presentation [Line Items]
Investments, Fair Value Disclosure, Total			600,000	$ 600,000		600,000
Other than Temporary Impairment Losses, Investments			$ 2,114,000	$ 2,114,000		$ 2,114,000
EWRS Turkey [Member]
Basis Of Presentation [Line Items]
Equity Method Investment, Ownership Percentage			100.00%			100.00%
Sale of EWRS Turkey [Member]
Basis Of Presentation [Line Items]
Proceeds from Divestiture of Interest in Consolidated Subsidiaries						$ 768,000
Divestiture of Subsidiary, Gross Sale value	$ 6,000,000	€ 4.2
Loss from Subsidiaries, Net of Tax						$ 572,000