Quarterly report pursuant to Section 13 or 15(d)

Summary of Restricted Shares Activity (Detail)

v3.7.0.1
Summary of Restricted Shares Activity (Detail) - Restricted Stock
3 Months Ended
Mar. 31, 2017
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares  
Number of Restricted Shares, Beginning Balance | shares 360,305
Number of Restricted Shares, Shares Forfeited | shares (267)
Number of Restricted Shares, Ending Balance | shares 360,038
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value  
Weighted Average Grant Date Fair Value Per Share, Beginning Balance | $ / shares $ 7.32
Weighted Average Grant Date Fair Value Per Share, Shares Forfeited | $ / shares 30.00
Weighted Average Grant Date Fair Value Per Share, Ending Balance | $ / shares $ 7.30