Annual report pursuant to Section 13 and 15(d)

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 4)

v3.3.1.900
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 4) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
EPS Numerator:                      
Net loss $ (12,687) $ (6,672) $ (13,912) $ (18,193) $ (22,272) $ (20,942) $ (25,391) $ (22,303) $ (51,464) $ (90,908) $ (89,027)
EPS Denominator - Basic and Diluted:                      
Weighted average common shares outstanding 89,038 88,506 88,137 88,043 87,793 87,793 87,532 87,526 88,434 87,662 87,288
Net loss per common share:                      
Basic and diluted (in dollars per share) $ (0.14) $ (0.08) $ (0.16) $ (0.21) $ (0.25) $ (0.24) $ (0.29) $ (0.25) $ (0.58) $ (1.04) $ (1.02)
Weighted Average [Member]                      
Net loss per common share:                      
Weighted average exercise price of options (in dollars per share) 7.08       9.07       7.08 9.07 10.55
Weighted average exercise price of warrant (in dollars per share) $ 6.61       $ 6.61       $ 6.61 $ 6.61 $ 6.61
Employee Stock Option                      
Net loss per common share:                      
Antidilutive securities excluded from computation of earnings per share (in shares)                 19,106 16,971 15,532
Warrant to purchase common stock                      
Net loss per common share:                      
Antidilutive securities excluded from computation of earnings per share (in shares)                 200 200 200