Quarterly report pursuant to Section 13 or 15(d)

Subsequent Events (Additional Information) (Detail)

v3.8.0.1
Subsequent Events (Additional Information) (Detail) - Stock Compensation Plan [Member] - USD ($)
3 Months Ended
May 04, 2018
Mar. 31, 2018
Subsequent Event [Line Items]    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period   105,000
Subsequent Event [Member]    
Subsequent Event [Line Items]    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value $ 6.10  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value $ 640,500  
Subsequent Event [Member] | External Directors [Member]    
Subsequent Event [Line Items]    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value $ 122,000  
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 12 months  
Subsequent Event [Member] | Management [Member]    
Subsequent Event [Line Items]    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value $ 518,500  
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 48 months