Quarterly report pursuant to sections 13 or 15(d)

8. FAIR VALUE MEASUREMENTS (Details)

v2.4.0.6
8. FAIR VALUE MEASUREMENTS (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
 3 Months Ended 12 Months Ended
Mar. 31, 2013
Dec. 31, 2012
Significant assumptions used in the valuations    
Fair value $ 8,079,000 $ 4,892,000
Original Issuance 03/28/2013
    
Significant assumptions used in the valuations    
Exercise price $ 7.80  
Volatility 71.10%  
Risk free interest rate 0.24%  
Term (years) 2 years  
Discount for Marketability restrictions 38.20%  
Warrants Outstanding 788,000  
Fair value 882,000  
Original issuance 1/11/2013
    
Significant assumptions used in the valuations    
Exercise price $ 7.80  
Volatility 72.50%  
Risk free interest rate 0.77%  
Term (years) 4 years 9 months 14 days  
Discount for Marketability restrictions 54.40%  
Warrants Outstanding 1,709,000  
Fair value 2,728,000  
Original issuance 9/26/2012
    
Significant assumptions used in the valuations    
Exercise price $ 8.85 $ 8.85
Volatility 84.20% 70.20%
Risk free interest rate 0.31% 0.36%
Term (years) 2 years 5 months 26 days 2 years 8 months 26 days
Discount for Marketability restrictions 75.90% 53.90%
Warrants Outstanding 1,771,000 1,833,000
Fair value 776,000 1,112,000
Original issuance 7/3/2012
    
Significant assumptions used in the valuations    
Exercise price $ 7.50 $ 7.50
Volatility 71.10% 76.10%
Risk free interest rate 0.57% 0.72%
Term (years) 4 years 3 months 4 days 4 years 6 months 4 days
Discount for Marketability restrictions 51.80% 55.50%
Warrants Outstanding 1,812,000 1,867,000
Fair value 2,880,000 2,756,000
Original issuance 7/3/2012 (2nd one)
    
Significant assumptions used in the valuations    
Exercise price $ 6.45 $ 6.45
Volatility 63.70% 69.30%
Risk free interest rate 0.14% 0.16%
Term (years) 9 months 4 days 1 year 4 days
Discount for Marketability restrictions 57.60% 55.50%
Warrants Outstanding 804,000 930,000
Fair value 335,000 509,000
Original issuance 12/13/2011
    
Significant assumptions used in the valuations    
Exercise price $ 11.25 $ 12.45
Volatility 68.10% 74.40%
Risk free interest rate 0.57% 0.54%
Term (years) 3 years 8 months 16 days 3 years 11 months 12 days
Discount for Marketability restrictions 47.10% 52.30%
Warrants Outstanding 306,000 330,000
Fair value 478,000 480,000
Original issuance 10/6/2010
    
Significant assumptions used in the valuations    
Exercise price   $ 1.80
Volatility   76.00%
Risk free interest rate   0.72%
Term (years)   4 years 9 months 18 days
Discount for Marketability restrictions   46.40%
Warrants Outstanding   17,000
Fair value   $ 35,000