Stock-Based Payments - Restricted Common Stock (Details) - USD ($) $ / shares in Units, $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
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| Restricted stock | |||
| Shares | |||
| Unvested at beginning of year (in shares) | 256,881 | ||
| Vested (in shares) | (178,662) | ||
| Repurchased (in shares) | (73,334) | ||
| Unvested at end of period (in shares) | 4,885 | 256,881 | |
| Weighted Average Grant Date Fair Value | |||
| Unvested at beginning of year (in dollars per share) | $ 0.38 | ||
| Vested (in dollars per share) | 0.39 | ||
| Repurchased (in dollars per share) | 0.38 | ||
| Unvested at end of period (in dollars per share) | $ 0.98 | $ 0.38 | |
| Additional disclosures | |||
| Total fair value of restricted stock vested | $ 0.1 | $ 0.1 | $ 0.1 |
| Performance-based restricted stock | |||
| Additional disclosures | |||
| Additional stock-based compensation expense recorded related to achievement of certain performance-based milestones | $ 1.0 | ||
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that were repurchased during the reporting period. No definition available.
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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 repurchased during the reporting period in accordance with the terms of the arrangement. No definition available.
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- Definition Additional share-based compensation cost recognized as a result of an occurrence of an event that accelerates its recognition. No definition available.
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- References No definition available.
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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 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 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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