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SIGNIFICANT ACCOUNTING POLICIES (Weighted-Average Assumptions Used in Determinig Fair Market Value of Options)(Details)
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
SIGNIFICANT ACCOUNTING POLICIES [Abstract]      
Risk-free interest rate 0.66% 1.35% 2.35%
Expected life of options 4 years 9 months 4 years 9 months 6 years 3 months
Expected volatility 87.86% 88.06% 81.77%
Expected dividend yield 0.00% 0.00% 0.00%