Stock-Based Compensation - Summary of Stock Option Award Activity (Detail) - 2014 Equity Incentive Plan [Member] - $ / shares |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2015 |
Sep. 30, 2014 |
Sep. 30, 2015 |
Sep. 30, 2014 |
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
| Number of Shares, Outstanding, December 31, 2014 | 1,022,360 | |||
| Number of Shares, Granted | 25,000 | 40,000 | 629,000 | 654,000 |
| Number of Shares, Exercised | (101,588) | |||
| Number of Shares, Expired | (8,000) | |||
| Number of Shares, Outstanding, September 30, 2015 | 1,541,772 | 1,541,772 | ||
| Number of Shares, Options exercisable, September 30, 2015 | 433,806 | 433,806 | ||
| Weighted Average Exercise Price, Outstanding, December 31, 2014 | $ 8.16 | |||
| Weighted Average Exercise Price, Granted | 10.91 | |||
| Weighted Average Exercise Price, Exercised | 3.18 | |||
| Weighted Average Exercise Price, Expired | 0.25 | |||
| Weighted Average Exercise Price, Outstanding, September 30, 2015 | $ 9.65 | 9.65 | ||
| Weighted Average Exercise Price, Options exercisable, September 30, 2015 | $ 7.00 | $ 7.00 | ||
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
|
| X | ||||||||||
- Definition The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Gross number of share options (or share units) granted during the period. No definition available.
|
| X | ||||||||||
- Definition Number of options outstanding, including both vested and non-vested options. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Weighted average price at which option holders acquired shares when converting their stock options into shares. No definition available.
|
| X | ||||||||||
- Definition Weighted average price at which grantees could have acquired the underlying shares with respect to stock options of the plan that expired. No definition available.
|
| X | ||||||||||
- Definition Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options. No definition available.
|
| X | ||||||||||
- Definition Number of share options (or share units) exercised during the current period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Details
|