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Employee Benefit Plans and Stock-based Compensation - Options Excerise prices (Details) shares in Thousands | 12 Months Ended
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Dec. 31, 2015 $ / shares shares
Exercise price ranges of options outstanding and exercisable [Abstract] |
Options outstanding, shares (in shares) | shares | 3,779
Weighted-average Exercise Price (in dollars per share) | $ 2.97
Weighted-average Remaining Contractual Life | 6 years 3 months 4 days
Options Vested and Exercisable Shares (in shares) | shares | 2,237
Option Vested and Exercisable, Weighted-Average Exercise Price (in dollars per share) | $ 3.42
$1.59 - $2.04 |
Exercise price ranges of options outstanding and exercisable [Abstract] |
Range of exercise price, minimum (in dollars per share) | 1.59
Range of exercise price, maximum (in dollars per share) | $ 2.04
Options outstanding, shares (in shares) | shares | 623
Weighted-average Exercise Price (in dollars per share) | $ 1.83
Weighted-average Remaining Contractual Life | 2 years 3 months 26 days
Options Vested and Exercisable Shares (in shares) | shares | 623
Option Vested and Exercisable, Weighted-Average Exercise Price (in dollars per share) | $ 1.83
$2.14 - $2.14 |
Exercise price ranges of options outstanding and exercisable [Abstract] |
Range of exercise price, minimum (in dollars per share) | 2.14
Range of exercise price, maximum (in dollars per share) | $ 2.14
Options outstanding, shares (in shares) | shares | 52
Weighted-average Exercise Price (in dollars per share) | $ 2.14
Weighted-average Remaining Contractual Life | 8 years 3 months 29 days
Options Vested and Exercisable Shares (in shares) | shares | 21
Option Vested and Exercisable, Weighted-Average Exercise Price (in dollars per share) | $ 2.14
$2.18 - $2.18 |
Exercise price ranges of options outstanding and exercisable [Abstract] |
Range of exercise price, minimum (in dollars per share) | 2.18
Range of exercise price, maximum (in dollars per share) | $ 2.18
Options outstanding, shares (in shares) | shares | 846
Weighted-average Exercise Price (in dollars per share) | $ 2.18
Weighted-average Remaining Contractual Life | 9 years 6 months
$2.29 - $2.29 |
Exercise price ranges of options outstanding and exercisable [Abstract] |
Range of exercise price, minimum (in dollars per share) | $ 2.29
Range of exercise price, maximum (in dollars per share) | $ 2.29
Options outstanding, shares (in shares) | shares | 200
Weighted-average Exercise Price (in dollars per share) | $ 2.29
Weighted-average Remaining Contractual Life | 8 years 5 months 1 day
Options Vested and Exercisable Shares (in shares) | shares | 75
Option Vested and Exercisable, Weighted-Average Exercise Price (in dollars per share) | $ 2.29
$2.36 - $2.36 |
Exercise price ranges of options outstanding and exercisable [Abstract] |
Range of exercise price, minimum (in dollars per share) | 2.36
Range of exercise price, maximum (in dollars per share) | $ 2.36
Options outstanding, shares (in shares) | shares | 383
Weighted-average Exercise Price (in dollars per share) | $ 2.36
Weighted-average Remaining Contractual Life | 7 years 2 months 1 day
Options Vested and Exercisable Shares (in shares) | shares | 215
Option Vested and Exercisable, Weighted-Average Exercise Price (in dollars per share) | $ 2.36
$2.47 - $2.47 |
Exercise price ranges of options outstanding and exercisable [Abstract] |
Range of exercise price, minimum (in dollars per share) | 2.47
Range of exercise price, maximum (in dollars per share) | $ 2.47
Options outstanding, shares (in shares) | shares | 399
Weighted-average Exercise Price (in dollars per share) | $ 2.47
Weighted-average Remaining Contractual Life | 8 years 5 months 23 days
Options Vested and Exercisable Shares (in shares) | shares | 120
Option Vested and Exercisable, Weighted-Average Exercise Price (in dollars per share) | $ 2.47
$2.51 - $2.51 |
Exercise price ranges of options outstanding and exercisable [Abstract] |
Range of exercise price, minimum (in dollars per share) | 2.51
Range of exercise price, maximum (in dollars per share) | $ 2.51
Options outstanding, shares (in shares) | shares | 20
Weighted-average Exercise Price (in dollars per share) | $ 2.51
Weighted-average Remaining Contractual Life | 9 years 3 months 29 days
Options Vested and Exercisable Shares (in shares) | shares | 13
Option Vested and Exercisable, Weighted-Average Exercise Price (in dollars per share) | $ 2.51
$2.91 - $2.91 |
Exercise price ranges of options outstanding and exercisable [Abstract] |
Range of exercise price, minimum (in dollars per share) | 2.91
Range of exercise price, maximum (in dollars per share) | $ 2.91
Options outstanding, shares (in shares) | shares | 408
Weighted-average Exercise Price (in dollars per share) | $ 2.91
Weighted-average Remaining Contractual Life | 5 years 9 months 22 days
Options Vested and Exercisable Shares (in shares) | shares | 329
Option Vested and Exercisable, Weighted-Average Exercise Price (in dollars per share) | $ 2.91
$3.18 - $4.81 |
Exercise price ranges of options outstanding and exercisable [Abstract] |
Range of exercise price, minimum (in dollars per share) | 3.18
Range of exercise price, maximum (in dollars per share) | $ 4.81
Options outstanding, shares (in shares) | shares | 386
Weighted-average Exercise Price (in dollars per share) | $ 4.72
Weighted-average Remaining Contractual Life | 4 years 2 months 9 days
Options Vested and Exercisable Shares (in shares) | shares | 384
Option Vested and Exercisable, Weighted-Average Exercise Price (in dollars per share) | $ 4.73
$4.92 - $7.82 |
Exercise price ranges of options outstanding and exercisable [Abstract] |
Range of exercise price, minimum (in dollars per share) | 4.92
Range of exercise price, maximum (in dollars per share) | $ 7.82
Options outstanding, shares (in shares) | shares | 462
Weighted-average Exercise Price (in dollars per share) | $ 5.87
Weighted-average Remaining Contractual Life | 3 years 9 months 11 days
Options Vested and Exercisable Shares (in shares) | shares | 457
Option Vested and Exercisable, Weighted-Average Exercise Price (in dollars per share) | $ 5.87

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- Definition The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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