Common Stock, Stock-Based Awards and Warrants - Restricted Stock (Details) - Restricted stock units - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
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| Units [Abstract] | |||
| Beginning Balance (in shares) | 1,638 | ||
| Granted (in shares) | 3,911 | ||
| Vested (in shares) | (368) | ||
| Forfeited (in shares) | (590) | ||
| Ending Balance (in shares) | 4,591 | 1,638 | |
| Vested and expected to vest (in shares) | 4,533 | ||
| Weighted Average Exercise Price (in dollars per share): | |||
| Beginning Balance (in dollars per share) | $ 8.60 | ||
| Granted (in dollars per share) | 2.67 | ||
| Vested (in dollars per share) | 8.64 | ||
| Forfeited (in dollars per share) | 8.48 | ||
| Ending Balance (in dollars per share) | 3.56 | $ 8.60 | |
| Vested and expected to vest (in dollars per share) | $ 3.47 | ||
| Aggregate Intrinsic Value | |||
| Balance | $ 10,512 | $ 10,579 | |
| Vested and expected to vest | 10,381 | ||
| Fair value of instruments vested in period | $ 1,200 | $ 2,100 | $ 600 |
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- Definition Share-based Compensation Arrangement By Share-based Payment Award, Equity Instruments Other Than Options, Intrinsic Value, Vested And Expected To Vest No definition available.
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- Definition Share-based Compensation Arrangement By Share-based Payment Award, Equity Instruments Other Than Options, Vested And Expected To Vest No definition available.
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- Definition Share-based Compensation Arrangement By Share-based Payment Award, Equity Instruments Other Than Options, Vested And Expected To Vest, Weighted Average Grant Date Fair Value No definition available.
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- Definition Units [Abstract] No definition available.
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available.
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- References No definition available.
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- Definition Intrinsic value of equity-based compensation awards not vested. Excludes stock and unit options. No definition available.
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- Details
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