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Consolidated Statements of Stockholders' Equity (USD $) In Thousands | Total | Common stock [Member] | Additional paid-in capital [Member] | Accumulated comprehensive income (deficit) [Member]
--- | --- | --- | --- | ---
BALANCE at Dec. 31, 2010 | $ 218,265 | $ 35 | $ 201,702 | $ 16,528
BALANCE, Shares at Dec. 31, 2010 |  | 34,971 |  |
Exercise of common stock options | 12 |  | 12 |
Exercise of common stock options, shares | 7 | 7 |  |
Non cash compensation recognized on stock options and ESPP | 973 |  | 973 |
Restricted stock grants, net of cancellations | 5,557 | 1 | 5,556 |
Restricted stock grants, net of cancellations, shares |  | 575 |  |
Cancellation of shares for payment of withholding tax | (303) |  | (303) |
Cancellation of shares for payment of withholding tax, shares |  | (37) |  |
Employee stock purchase plan | 413 |  | 413 |
Employee stock purchase plan, shares |  | 96 |  |
Tax benefit deficiencies related to restricted stock expense | (426) |  | (426) |
Comprehensive loss | (159,631) |  |  | (159,631)
BALANCE at Dec. 31, 2011 | 64,860 | 36 | 207,927 | (143,103)
BALANCE, Shares at Dec. 31, 2011 |  | 35,612 |  |
Exercise of common stock options | 16 |  | 16 |
Exercise of common stock options, shares | 32 | 32 |  |
Non cash compensation recognized on stock options and ESPP | 66 |  | 66 |
Restricted stock grants, net of cancellations | 3,883 |  | 3,883 |
Restricted stock grants, net of cancellations, shares |  | 574 |  |
Cancellation of shares for payment of withholding tax | (40) |  | (40) |
Cancellation of shares for payment of withholding tax, shares |  | (23) |  |
Employee stock purchase plan | 66 |  | 66 |
Employee stock purchase plan, shares |  | 53 |  |
Shares repurchased and cancelled | (753) |  | (753) |
Shares repurchased and cancelled, shares |  | (375) |  |
Comprehensive loss | (25,436) |  |  | (25,436)
BALANCE at Dec. 31, 2012 | 42,662 | 36 | 211,165 | (168,539)
BALANCE, Shares at Dec. 31, 2012 |  | 35,873 |  |
Non cash compensation recognized on stock options and ESPP | 168 |  | 168 |
Restricted stock grants, net of cancellations | 3,365 | 1 | 3,364 |
Restricted stock grants, net of cancellations, shares |  | 1,179 |  |
Cancellation of shares for payment of withholding tax | (114) |  | (114) |
Cancellation of shares for payment of withholding tax, shares |  | (96) |  |
Employee stock purchase plan | 36 |  | 36 |
Employee stock purchase plan, shares |  | 38 |  |
Comprehensive loss | (27,946) |  |  | (27,946)
BALANCE at Dec. 31, 2013 | $ 18,171 | $ 37 | $ 214,619 | $ (196,485)
BALANCE, Shares at Dec. 31, 2013 |  | 36,994 |  |

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