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CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY (USD $) In Thousands, except Share data, unless otherwise specified | Preferred Shares [Member] | Common Shares [Member] | Paid-In Capital [Member] | Accumulated Comprehensive Income (Loss) [Member] | Accumulated Deficit [Member] | Total
--- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2008 | $ 1 | $ 70 | $ 753,634 | $ (2) | $ (785,104) | $ (31,401)
Balance (in shares) at Dec. 31, 2008 | 3 | 9,364 |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Exercise of stock options, contributions to 401(k) and incentive plans | 0 | 1 | 1,358 | 0 | 0 | 1,359
Exercise of stock options, contributions to 401(k) and incentive plans (in shares) |  | 135 |  |  |  |
Stock-based compensation expense | 0 | 0 | 4,395 | 0 | 0 | 4,395
Sale of shares of common stock | 0 | 30 | 42,591 | 0 | 0 | 42,621
Sale of shares of common stock (in shares) |  | 4,036 |  |  |  |
Comprehensive income (loss): |  |  |  |  |  |
Net change in unrealized loss on investments | 0 | 0 | 0 | 2 | 0 | 2
Net income (loss) | 0 | 0 | 0 | 0 | 550 | 550
Comprehensive income (loss) | 0 | 0 | 0 | 0 | 0 | 552
Balance at Dec. 31, 2009 | 1 | 101 | 801,978 | 0 | (784,554) | 17,526
Balance (in shares) at Dec. 31, 2009 | 3 | 13,536 |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Exercise of stock options, contributions to 401(k) and incentive plans | 0 | 1 | 945 | 0 | 0 | 946
Exercise of stock options, contributions to 401(k) and incentive plans (in shares) |  | 94 |  |  |  |
Stock-based compensation expense | 0 | 0 | 4,913 | 0 | 0 | 4,913
Sale of shares of common stock | 0 | 109 | 66,232 | 0 | 0 | 66,341
Sale of shares of common stock (in shares) |  | 14,469 |  |  |  |
Exercise of warrants | 0 | 3 | 2,618 | 0 | 0 | 2,621
Exercise of warrants (in shares) |  | 392 |  |  |  |
Comprehensive income (loss): |  |  |  |  |  |
Net income (loss) | 0 | 0 | 0 | 0 | (68,756) | (68,756)
Comprehensive income (loss) | 0 | 0 | 0 | 0 | 0 | (68,756)
Balance at Dec. 31, 2010 | 1 | 214 | 876,686 | 0 | (853,310) | 23,591
Balance (in shares) at Dec. 31, 2010 | 3 | 28,491 |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Exercise of stock options, contributions to 401(k) and incentive plans | 0 | 2 | 1,099 | 0 | 0 | 1,101
Exercise of stock options, contributions to 401(k) and incentive plans (in shares) |  | 253 |  |  |  |
Stock-based compensation expense | 0 | 0 | 7,759 | 0 | 0 | 7,759
Sale of shares of common stock | 0 | 45 | 15,043 | 0 | 0 | 15,088
Sale of shares of common stock (in shares) |  | 6,108 |  |  |  |
Conversion of Series B convertible preferred stock | (3) | 2 | (1) | 0 | 0 | 0
Conversion of Series B convertible preferred stock (in shares) |  | 255 |  |  |  |
Issuance of warrants | 0 | 0 | 215 | 0 | 0 | 215
Comprehensive income (loss): |  |  |  |  |  |
Net income (loss) | 0 | 0 | 0 | 0 | (32,743) | (32,743)
Comprehensive income (loss) | 0 | 0 | 0 | 0 | 0 | (32,743)
Balance at Dec. 31, 2011 | $ 0 | $ 263 | $ 900,801 | $ 0 | $ (886,053) | $ 15,011
Balance (in shares) at Dec. 31, 2011 |  | 35,107 |  |  |  |

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