v2.4.0.6

The business (Details) (USD $) In Thousands, except Share data, unless otherwise specified | 0 Months Ended | 12 Months Ended
--- | --- | ---
May 03, 2011 | Dec. 31, 2011
Initial public offering |  |
Common stock offered (in shares) | 3,846,800 |
Public offering of common stock held by selling stockholders (in shares) | 1,923,200 |
Proceeds from initial public offering after deducting underwriting discount, commission and offering expenses |  | $ 45,701
Underwriting discounts and commissions on public offering |  | 3,635
Offering expenses on public offering |  | 2,596
Issuance of common stock upon conversion of preferred stock (in shares) | 22,845,764 |
Issuance of common stock upon exercise and conversion of preferred stock warrants (in shares) | 20,172 |
Reverse stock split |  |
Ratio for reverse stock split of outstanding common stock | 5 |
Fractional shares settled in cash for common and preferred stockholders | $ 1 |
Number of fractional shares settled in cash for common and preferred stockholders | 0 |

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