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ACCOUNTING POLICIES (Details Textual)
$ / shares in Units, € in Millions
 12 Months Ended
Jun. 10, 2014
USD ($)
Dec. 31, 2016
USD ($)
$ / shares
shares
Dec. 31, 2015
USD ($)
$ / shares
shares
Dec. 31, 2014
USD ($)
$ / shares
shares
Dec. 31, 2014
EUR (€)
shares
Accounting Policies [Line Items]          
Interest Costs Capitalized   $ 443,000 $ 431,000 $ 371,000  
Property Subject to or Available for Operating Lease, Net, Total   96,270,000 83,267,000    
Property Subject to or Available for Operating Lease, Accumulated Depreciation   $ 53,306,000 $ 47,198,000    
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | shares   581,000 614,000 633,000 633,000
Gain (Loss) on Disposition of Stock in Subsidiary   $ 0 $ 0 $ (572,000)  
Warrants Issued With Promissory Notes During The Period | shares     200,000 200,000 200,000
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares     $ 2.20 $ 2.20  
Proceeds from Divestiture of Interest in Consolidated Subsidiaries   0 $ 0 $ 768,000  
Fair Value of Assets Acquired   0 0 700,000  
Advertising Expense   279,000 115,000 155,000  
Accounting Standards Update 2015-03 [Member]          
Accounting Policies [Line Items]          
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets   67,000 72,000    
EWRS [Member]          
Accounting Policies [Line Items]          
Payments for (Proceeds from) Investments       6,000,000  
Sale of EWRS Turkey [Member]          
Accounting Policies [Line Items]          
Foreign Currency Transaction Gain, before Tax   $ 0 0 161,000  
Cumulative Translation Adjustment, Net of Tax, Period Increase (Decrease)       779,000  
Payments for (Proceeds from) Investments | €         € 4.2
Gain (Loss) on Disposition of Stock in Subsidiary $ 572,000        
Proceeds from Divestiture of Interest in Consolidated Subsidiaries       $ 768,000  
PBRT [Member]          
Accounting Policies [Line Items]          
Property, Plant and Equipment, Useful Life   20 years      
Mevion Medical Systems Inc [Member]          
Accounting Policies [Line Items]          
Cost Method Investments   $ 579,000 $ 579,000    
Cost Method Investment Interest Percentage   0.46%      
Maximum [Member]          
Accounting Policies [Line Items]          
Stock Options Exercise Price | $ / shares   $ 3.15 $ 3.15 $ 6.16  
Maximum [Member] | Medical and Office equipment [Member]          
Accounting Policies [Line Items]          
Property, Plant and Equipment, Useful Life   10 years      
Minimum [Member]          
Accounting Policies [Line Items]          
Stock Options Exercise Price | $ / shares   $ 2.43 $ 2.05 $ 2.43  
Minimum [Member] | Medical and Office equipment [Member]          
Accounting Policies [Line Items]          
Property, Plant and Equipment, Useful Life   3 years