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Condensed Consolidated Statement of Stockholders' Equity (Unaudited) (USD $) In Thousands | Total | Common Stock | Treasury Stock | Additional Paid-in Capital | Accumulated Other Comprehensive Income (Loss) | Accumulated Deficit
--- | --- | --- | --- | --- | --- | ---
Beginning balance at Dec. 31, 2011 | $ 78,298 | $ 5 | $ (1,667) | $ 166,814 | $ (44) | $ (86,810)
Beginning balance, shares at Dec. 31, 2011 |  | 51,958 | 1,358 |  |  |
Net income | 26,590 |  |  |  |  | 26,590
Other comprehensive income (loss) | (16) |  |  |  | (16) |
Stock warrants exercised | 263 |  |  | 263 |  |
Stock warrants exercised, shares |  | 217 |  |  |  |
Fair value of warrant liability reclassified to additional paid-in capital | 13,973 |  |  | 13,973 |  |
Stock options exercised | 167 |  |  | 167 |  |
Stock options exercised, shares |  | 67 |  |  |  |
Treasury stock purchased | (497) |  | (497) |  |  |
Treasury stock purchased, shares |  |  | 41 |  |  |
Restricted stock granted, Shares issued |  | 676 |  |  |  |
Restricted stock forfeited, Share issued |  |  | 19 |  |  |
Excess tax benefit related to share-based awards | 579 |  |  | 579 |  |
Stock compensation expense | 9,571 |  |  | 9,571 |  |
Return of borrowed shares under share lending agreement |  |  | 659 |  |  |
Ending balance at Sep. 30, 2012 | $ 128,928 | $ 5 | $ (2,164) | $ 191,367 | $ 60 | $ (60,220)
Ending balance, shares at Sep. 30, 2012 |  | 52,918 | 2,077 |  |  |

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