Stock-Based Compensation - Additional Information (Detail) - USD ($) |
3 Months Ended | |
|---|---|---|
Mar. 31, 2017 |
Mar. 31, 2016 |
|
| Stock Based Compensation [Line Items] | ||
| Stock based compensation expense | $ 752,193 | $ 368,383 |
| Number of shares, Options exercised | 0 | 0 |
| Weighted average grant date fair value | $ 1.31 | $ 1.00 |
| 2016 Stock Plan [Member] | ||
| Stock Based Compensation [Line Items] | ||
| Number of shares, Options granted | 0 | |
| Stock options vesting period | 4 years | |
| Common stock available for grant | 2,201,828 | |
| Number of shares, Forfeited | 217,530 | |
| Maximum term of stock options | 10 years | |
| 2016 Stock Plan [Member] | Employees Consultants And Directors [Member] | ||
| Stock Based Compensation [Line Items] | ||
| Number of shares, Options granted | 1,140,338 | |
| 2014 Stock Plan [Member] | ||
| Stock Based Compensation [Line Items] | ||
| Number of shares, Options granted | 0 | |
| Number of shares, Forfeited | 90,000 | |
| 2014 Stock Plan [Member] | Employees Consultants And Directors [Member] | ||
| Stock Based Compensation [Line Items] | ||
| Number of shares, Options granted | 1,068,881 | |
| X | ||||||||||
- Definition Stock Based Compensation [Line Items] No definition available.
|
| X | ||||||||||
- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan. 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 Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Weighted average grant-date fair value of options vested. 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
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|