Annual report pursuant to section 13 and 15(d)

6. STOCK OPTION PLAN AND STOCK-BASED COMPENSATION (Details)

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6. STOCK OPTION PLAN AND STOCK-BASED COMPENSATION (Details)
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Risk-free interest rate, Minimum 0.47% 0.43%
Risk-free interest rate, Maximum 1.55% 1.27%
Expected dividend yield 0.00% 0.00%
Minimum [Member]
   
Volatility factor 85.00% 85.00%
Expected life of option 3 years 3 months 3 years 6 months
Maximum [Member]
   
Volatility factor 96.00% 90.00%
Expected life of option 6 years 7 years