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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 |

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