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SIGNIFICANT ACCOUNTING POLICIES (Details 4) (USD $)
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Investment in Available-For-Sale Securities      
Total cumulative net unrealized gain on all investments in equity and debt securities $ 98,000 $ 86,000  
Sales proceeds and gross realized gains and losses on available-for-sale securities      
Sales proceeds 373,000   6,345,000
Gross realized gains 9,000   149,000
Impairment charge on available-for-sale securities   126,000  
BRT
     
Investment in Available-For-Sale Securities      
Investment in number of common shares 37,081    
Maximum percentage of voting power of related party held 1.00%    
Cost at which securities are purchased 132,000    
Fair market value of securities $ 241,000 $ 235,000