XML 93 R63.htm IDEA: XBRL DOCUMENT v2.4.0.6
Fair Value Measurements (Changes in Level 3 Liabilities) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Changes in warrant liability    
Balance, end of year $ 0 $ 16,622 [1]
Level 3 [Member]
   
Changes in warrant liability    
Balance, beginning of year 16,622 [1] 26,193
Fair value adjustments, net (2,649) (9,571)
Reclassification to additional paid-in capital (13,973) 0
Net transfers in/(out) 0 0
Balance, end of year $ 0 $ 16,622 [1]
[1] The fair value of the common stock warrants was estimated using a Black-Scholes option pricing model. See Note 13 for additional information regarding warrants.