Stock-Based Compensation - Restricted Stock Units (Details) - Restricted Stock Units - USD ($) |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
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| Number of Shares | |||
| Beginning balance (in shares) | 272,000 | 0 | |
| Granted (in shares) | 2,249,242 | 402,000 | |
| Released (in shares) | (372,487) | (95,000) | |
| Forfeited (in shares) | (874,453) | (35,000) | |
| Ending balance (in shares) | 1,274,302 | 272,000 | |
| Weighted Average Grant Date Fair Value Per Share | |||
| Beginning weighted average grant date fair value (in USD per share) | $ 1.43 | $ 3.99 | |
| Granted (in USD per share) | 1.59 | 4.06 | |
| Released (in USD per share) | 3.47 | 4.27 | |
| Forfeitures (in USD per share) | 1.75 | 3.99 | |
| Ending weighted average grant date fair value (in USD per share) | $ 3.99 | $ 0.00 | |
| Intrinsic value, outstanding | $ 391,848 | $ 571,200 | $ 0 |
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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 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 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 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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- Definition Number of shares under non-option equity instrument agreements that were cancelled as a result of occurrence of a terminating event. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Net number of non-option equity instruments granted to participants. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Number of equity instruments other than options outstanding, including both vested and non-vested instruments. 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 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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