Stockholders' Equity - Reconciliation of Warrant Liability Measured at Fair Value (Detail) (USD $)
In Thousands, unless otherwise specified |
12 Months Ended | ||
---|---|---|---|
Dec. 31, 2012
|
Dec. 31, 2011
|
Dec. 31, 2010
|
|
Fair Value, Instruments Classified in Shareholders' Equity Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] | |||
Beginning Balance | $ 9,209 | $ 7,499 | |
Exercise of common stock warrants during 2012 | (27,867) | ||
Initial Fair Value of common stock warrants related March 2011 offering | 6,068 | ||
Change in fair value of common stock warrants | 51,216 | (4,358) | (5,166) |
Ending Balance | $ 32,558 | $ 9,209 | $ 7,499 |
X | ||||||||||
- Definition
Exercise of warrants liability measured at fair value. No definition available.
|
X | ||||||||||
- Definition
Fair value of Common Stock warrants issued. No definition available.
|
X | ||||||||||
- Details
|
X | ||||||||||
- Definition
Aggregate net gain (loss) on all derivative instruments recognized in earnings during the period, before tax effects. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
X | ||||||||||
- Definition
Value of outstanding derivative securities that permit the holder the right to purchase securities (usually equity) from the issuer at a specified price. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|