Annual report pursuant to Section 13 and 15(d)

Stock Incentive Plan - Schedule of Information Regarding Restricted Stock Activity (Detail)

v3.19.1
Stock Incentive Plan - Schedule of Information Regarding Restricted Stock Activity (Detail)
12 Months Ended
Dec. 31, 2017
USD ($)
$ / shares
shares
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Non-Vested, Shares, Beginning Balance | shares 0
Non-Vested, Shares, Granted | shares 211,658
Non-Vested, Shares, Lapse of restrictions | shares (211,658)
Non-Vested, Shares, Forfeited or expired | shares 0
Non-Vested, Shares, Ending Balance | shares 0
Weighted Average Grant Date Fair Value, Beginning Balance | $ / shares $ 0
Weighted Average Grant Date Fair Value, Granted | $ / shares 7.01
Weighted Average Grant Date Fair Value, Lapse of restrictions | $ / shares (7.01)
Weighted Average Grant Date Fair Value, Forfeited | $ / shares 0
Weighted Average Grant Date Fair Value, Ending Balance | $ / shares $ 0
Aggregate Intrinsic Value, Beginning Balance | $ $ 0
Aggregate Intrinsic Value, Granted | $ 1,484
Aggregate Intrinsic Value, Lapse of restrictions | $ 1,488
Aggregate Intrinsic Value, Forfeited or expired | $ 0
Aggregate Intrinsic Value, Ending Balance | $ $ 0