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INVESTMENT IN EQUITY SECURITIES (Details Textual) - USD ($)
1 Months Ended 12 Months Ended
Jun. 30, 2015
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Schedule of Cost-method Investments [Line Items]        
Investments, Fair Value Disclosure   $ 0    
Other than Temporary Impairment Losses, Investments   579,000 $ 0 $ 2,140,000
Cost-method Investments, Other than Temporary Impairment       26,000
Mevion Medical Systems Inc [Member]        
Schedule of Cost-method Investments [Line Items]        
Investments, Fair Value Disclosure $ 600,000 0 579,000 579,000
Other than Temporary Impairment Losses, Investments $ 2,114,000     $ 2,140,000
Cost Method Investments   $ 579,000 $ 579,000  
Cost Method Investments Ownership Percentage   0.46%