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Consolidated Statements of Stockholders' Equity (USD $) In Thousands, except Share data | Total | Common Stock | Additional Paid-In Capital | Accumulated Deficit
--- | --- | --- | --- | ---
Balance at Dec. 31, 2009 | $ 16,028 | $ 1,145 | $ 149,487 | $ (134,604)
Balance, shares at Dec. 31, 2009 |  | 114,535,000 |  |
Restricted stock issued, net |  | 5 | (5) |
Restricted stock issued net, shares |  | 501,000 |  |
Exercise of stock options, net | 1 | 2 | (1) |
Exercise of stock options net, shares | 452,474 | 235,000 |  |
Stock issued for services | 29 |  | 29 |
Stock issued for services, shares |  | 20,000 |  |
Stock-based compensation | 8,726 |  | 8,726 |
Net income/(loss) | (7,549) |  |  | (7,549)
Balance at Dec. 31, 2010 | 17,235 | 1,152 | 158,236 | (142,153)
Balance, shares at Dec. 31, 2010 |  | 115,291,000 |  |
Restricted stock issued, net |  | 5 | (5) |
Restricted stock issued net, shares |  | 535,000 |  |
Shares repurchased | (2,153) | (3) | (2,150) |
Shares repurchased, shares |  | (386,000) |  |
Exercise of stock options, net | 538 | 13 | 525 |
Exercise of stock options net, shares | 1,280,687 | 1,243,000 |  |
Stock issued for services | 127 |  | 127 |
Stock issued for services, shares |  | 20,000 |  |
Stock-based compensation | 7,014 |  | 7,014 |
Net income/(loss) | 3,092 |  |  | 3,092
Balance at Dec. 31, 2011 | 25,853 | 1,167 | 163,747 | (139,061)
Balance, shares at Dec. 31, 2011 |  | 116,703,000 |  |
Net proceeds from sale of common stock | 4,329 | 10 | 4,319 |
Net proceeds from sale of common stock, shares |  | 1,000,000 |  |
Restricted stock issued, net |  | 12 | (12) |
Restricted stock issued net, shares |  | 1,179,000 |  |
Shares repurchased | (2,261) | (4) | (2,257) |
Shares repurchased, shares | (357,123) | (357,000) |  |
Exercise of stock options, net | 4,672 | 80 | 4,592 |
Exercise of stock options net, shares | 8,018,516 | 8,019,000 |  |
Stock issued for services | 28 |  | 28 |
Stock issued for services, shares |  | 10,000 |  |
Stock-based compensation | 7,409 |  | 7,409 |
Net income/(loss) | 11,030 |  |  | 11,030
Balance at Dec. 31, 2012 | $ 51,060 | $ 1,265 | $ 177,826 | $ (128,031)
Balance, shares at Dec. 31, 2012 |  | 126,554,000 |  |

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