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Warrants (Details) (USD $)
In Thousands, except Share data, unless otherwise specified |
3 Months Ended | 12 Months Ended | 0 Months Ended | ||||||
|---|---|---|---|---|---|---|---|---|---|
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Mar. 31, 2014
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Mar. 31, 2013
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Dec. 31, 2013
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Apr. 02, 2014
Subsequent Event
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Mar. 31, 2014
Warrant issued to purchase Series D redeemable convertible preferred stock expiring in 2022
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Dec. 31, 2013
Warrant issued to purchase Series D redeemable convertible preferred stock expiring in 2022
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Apr. 30, 2012
Warrant issued to purchase Series D redeemable convertible preferred stock expiring in 2022
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Mar. 31, 2014
Warrant issued to purchase Series D redeemable convertible preferred stock expiring in 2023
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Dec. 31, 2013
Warrant issued to purchase Series D redeemable convertible preferred stock expiring in 2023
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| Warrants | |||||||||
| Number of shares of preferred stock that may be purchased by warrant | 12,797 | 71,021 | |||||||
| Exercise price of warrant (in dollars per share) | $ 7.81 | $ 7.81 | |||||||
| Fair value of warrant (in dollars per share) | $ 119 | $ 19 | $ 74 | $ 695 | $ 107 | ||||
| Reductions of interest expense | (688) | 8 | 33 | ||||||
| Amount of warrants liability reclassified to additional paid in capital on conversion of warrants to purchase Series D redeemable convertible preferred stock | $ 814 | ||||||||