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Equity Incentive Plans and Stock-Based Compensation (Details 4) | 12 Months Ended
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Dec. 31, 2017 $ / shares shares
Exercise price range 1 |
Exercise price range |
Exercise price range, low end of range (in dollars per share) | $ 4.13
Exercise price range, high end of range (in dollars per share) | $ 5.39
Options Outstanding |
Number Outstanding (in shares) | shares | 75,665
Weighted Average Remaining Contractual Life (in years) | 4 years 8 months 8 days
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ 4.60
Options Exercisable |
Number Exercisable (in shares) | shares | 75,665
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $ 4.60
Exercise price range 2 |
Exercise price range |
Exercise price range, low end of range (in dollars per share) | 5.46
Exercise price range, high end of range (in dollars per share) | $ 5.46
Options Outstanding |
Number Outstanding (in shares) | shares | 447,780
Weighted Average Remaining Contractual Life (in years) | 5 years 29 days
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ 5.46
Options Exercisable |
Number Exercisable (in shares) | shares | 447,780
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $ 5.46
Exercise price range 3 |
Exercise price range |
Exercise price range, low end of range (in dollars per share) | 5.49
Exercise price range, high end of range (in dollars per share) | $ 5.63
Options Outstanding |
Number Outstanding (in shares) | shares | 237,068
Weighted Average Remaining Contractual Life (in years) | 2 years 5 months 5 days
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ 5.63
Options Exercisable |
Number Exercisable (in shares) | shares | 237,068
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $ 5.63
Exercise price range 4 |
Exercise price range |
Exercise price range, low end of range (in dollars per share) | 5.76
Exercise price range, high end of range (in dollars per share) | $ 5.76
Options Outstanding |
Number Outstanding (in shares) | shares | 596,669
Weighted Average Remaining Contractual Life (in years) | 4 years 6 months
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ 5.76
Options Exercisable |
Number Exercisable (in shares) | shares | 596,669
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $ 5.76
Exercise price range 5 |
Exercise price range |
Exercise price range, low end of range (in dollars per share) | 6.83
Exercise price range, high end of range (in dollars per share) | $ 8.73
Options Outstanding |
Number Outstanding (in shares) | shares | 407,628
Weighted Average Remaining Contractual Life (in years) | 3 years 3 months 14 days
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ 7.77
Options Exercisable |
Number Exercisable (in shares) | shares | 407,628
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $ 7.77
Exercise price range 6 |
Exercise price range |
Exercise price range, low end of range (in dollars per share) | 8.76
Exercise price range, high end of range (in dollars per share) | $ 8.76
Options Outstanding |
Number Outstanding (in shares) | shares | 674,798
Weighted Average Remaining Contractual Life (in years) | 6 years 22 days
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ 8.76
Options Exercisable |
Number Exercisable (in shares) | shares | 635,447
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $ 8.76
Exercise price range 7 |
Exercise price range |
Exercise price range, low end of range (in dollars per share) | 9.18
Exercise price range, high end of range (in dollars per share) | $ 11.92
Options Outstanding |
Number Outstanding (in shares) | shares | 433,979
Weighted Average Remaining Contractual Life (in years) | 6 years 5 months 12 days
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ 11.21
Options Exercisable |
Number Exercisable (in shares) | shares | 323,859
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $ 11.17
Exercise price range 8 |
Exercise price range |
Exercise price range, low end of range (in dollars per share) | 11.93
Exercise price range, high end of range (in dollars per share) | $ 12.31
Options Outstanding |
Number Outstanding (in shares) | shares | 498,356
Weighted Average Remaining Contractual Life (in years) | 8 years 1 month 10 days
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ 12.26
Options Exercisable |
Number Exercisable (in shares) | shares | 201,321
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $ 12.28
Exercise price range 9 |
Exercise price range |
Exercise price range, low end of range (in dollars per share) | 12.33
Exercise price range, high end of range (in dollars per share) | $ 12.33
Options Outstanding |
Number Outstanding (in shares) | shares | 1,478
Weighted Average Remaining Contractual Life (in years) | 1 month 17 days
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ 12.33
Options Exercisable |
Number Exercisable (in shares) | shares | 1,478
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $ 12.33
Exercise price range 10 |
Exercise price range |
Exercise price range, low end of range (in dollars per share) | 12.80
Exercise price range, high end of range (in dollars per share) | $ 23.60
Options Outstanding |
Number Outstanding (in shares) | shares | 936,940
Weighted Average Remaining Contractual Life (in years) | 5 years 11 months 12 days
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ 15.50
Options Exercisable |
Number Exercisable (in shares) | shares | 501,680
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $ 17.60
Exercise price range 11 |
Exercise price range |
Exercise price range, low end of range (in dollars per share) | 4.13
Exercise price range, high end of range (in dollars per share) | $ 23.60
Options Outstanding |
Number Outstanding (in shares) | shares | 4,310,361
Weighted Average Remaining Contractual Life (in years) | 5 years 6 months 4 days
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ 9.78
Options Exercisable |
Number Exercisable (in shares) | shares | 3,428,595
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $ 9.11

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