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Stock-Based Awards (Tables) | 9 Months Ended
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Sep. 30, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Summary of Unrecognized Stock-Based Compensation Expense and Average Remaining Vesting Period | A summary of unrecognized stock-based compensation expense and average remaining vesting period is as follows:
|  | September 30, 2018 |
|  | Unrecognized Stock- Based Compensation |  |  | Average Remaining Vesting Period (Years) |
Employees and directors |  | $ | 15,974 |  |  |  | 1.66 |
Summary of Stock Options, Restricted Stock and Restricted Stock Unit Activity | A summary of stock options, restricted stock and restricted stock unit activity for the three months ended September 30, 2018 is as follows:
|  | Stock Options |  |  | Restricted Stock Awards |  |  | Restricted Stock Units |
Balance at July 1, 2018 |  |  | 975,537 |  |  |  | 2,331,946 |  |  |  | 12,096 |
Granted |  |  | — |  |  |  | — |  |  |  | — |
Exercised/vested |  |  | (25,000 | ) |  |  | (156,752 | ) |  |  | (1,156 | )
Forfeitures |  |  | — |  |  |  | (37,568 | ) |  |  | — |
Balance at September 30, 2018 |  |  | 950,537 |  |  |  | 2,137,626 |  |  |  | 10,940 |

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