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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (USD $)
In Thousands, except Share data, unless otherwise specified
Total
Common Stock
Additional Paid-In Capital
Accumulated Deficit
Accumulated Other Comprehensive Income
Treasury Stock
BEGINNING BALANCES at Dec. 31, 2009 $ 53,485 $ 331 $ 355,747 $ (277,116) $ 0 $ (25,477)
BEGINNING BALANCES (in shares) at Dec. 31, 2009   30,376,374        
Net income (loss) for the year (141,760) 0 0 (141,760) 0 0
Foreign currency translation 0          
Stock-based compensation (in shares)   293,389        
Stock-based compensation 2,431 (2) 2,433 0 0 0
Stock repurchase (in shares)   (51,355)        
Stock repurchase (384) 1 157 0 0 (542)
Preferred stock dividends and early extinguishment (25,454) 0 0 (25,454) 0 0
Common stock issued in connection with:            
Public offering (in shares)   11,750,000        
Public offering 71,943 118 71,825 0 0 0
Exercise of warrant (in shares)   25,486,532        
Exercise of warrant 168,260 254 168,006 0 0 0
Stock option plan (in shares)   75,874        
Stock option plan 504 1 503 0 0 0
ENDING BALANCES at Dec. 31, 2010 129,025 703 598,671 (444,330) 0 (26,019)
ENDING BALANCES (in shares) at Dec. 31, 2010   67,930,814        
Net income (loss) for the year 15,042 0 0 15,042 0 0
Foreign currency translation 0          
Stock-based compensation (in shares)   191,188        
Stock-based compensation 2,424 0 2,424 0 0 0
Stock repurchase (in shares)   (50,848)        
Stock repurchase (533) 0 0 0 0 (533)
Common stock issued in connection with:            
Public offering (in shares)   0        
Public offering (150) 0 (150) 0 0 0
Stock option plan (in shares)   94,514        
Stock option plan 538 1 537 0 0 0
ENDING BALANCES at Dec. 31, 2011 146,346 704 601,482 (429,288) 0 (26,552)
ENDING BALANCES (in shares) at Dec. 31, 2011   68,165,668        
Net income (loss) for the year 105,631 0 0 105,631 0 0
Foreign currency translation 248 0 0 0 248 0
Stock-based compensation (in shares)   186,368        
Stock-based compensation 4,385 (3) 4,388 0 0 0
Stock repurchase (in shares)   (54,534)        
Stock repurchase (564) 0 0 0 0 (564)
Equity component of convertible senior notes, net of taxes 12,328 0 12,328 0 0 0
Common stock issued in connection with:            
Stock option plan (in shares)   81,482        
Stock option plan 353 1 352 0 0 0
ENDING BALANCES at Dec. 31, 2012 $ 268,727 $ 702 $ 618,550 $ (323,657) $ 248 $ (27,116)
ENDING BALANCES (in shares) at Dec. 31, 2012   68,378,984