Stock-based Compensation - Additional Information (Detail) - 2012 Equity Incentive Plan [Member] - USD ($) |
3 Months Ended | ||
|---|---|---|---|
Jun. 22, 2018 |
Mar. 31, 2019 |
Mar. 31, 2018 |
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| Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] | |||
| Number of additional shares authorized for issuance under an established share-based compensation plan | 1,500,000 | ||
| Shares authorized under the incentive plan | 2,250,000 | ||
| Maximum number of shares per individual per calendar year | 1,000,000 | ||
| Number of stock options outstanding | 1,862,133 | ||
| Stock option awards available for future grant | 147,117 | ||
| Stock option awards | 50,000 | 0 | |
| Weighted-average grant date fair value | $ 0.59 | $ 0.00 | |
| Stock options vested | 0 | ||
| Stock options forfeited | 0 | ||
| Number of stock options, exercised | 0 | ||
| Non-employee Directors [Member] | |||
| Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] | |||
| Annual retainer amount for the threshold of stock precluded from selling | $ 270,000 | ||
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- Definition Represents the minimum dollar value stock ownership holding requirement threshold equal to a multiplier and the annual Board retainer below which dollar threshold they would be precluded from selling shares of Company stock acquired from the Company under its plan. No definition available.
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- Definition Aggregate number of common shares reserved for future issuance. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- 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.
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- Definition The highest quantity of shares an employee can purchase under the plan per period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Number of additional shares authorized for issuance under an established share-based compensation plan. No definition available.
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- Definition The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- 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://fasb.org/us-gaap/role/ref/legacyRef
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- 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://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Gross number of share options (or share units) granted during the period. No definition available.
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- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Number of options vested. No definition available.
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- Definition Number of share options (or share units) exercised during the current period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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