Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - Additional Information (Detail)

v3.2.0.727
Stock-Based Compensation - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Employee Stock Purchase Plan [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of shares authorized 200,000  
Stock based compensation expense $ 14 $ 17
Income tax benefit to stock based compensation $ 5 $ 6
Discounted purchase price of common stock percentage on fair market value 85.00% 85.00%
Amended and Restated 2000 Incentive Plan [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of shares authorized 1,375,000  
Amended and Restated 2000 Incentive Plan [Member] | Restricted Stock [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of shares authorized 250,000  
Restricted stock awards 34,000 28,000
Amended and Restated 2000 Incentive Plan [Member] | Employee Stock Option [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Stock options maximum term 10 years  
Stock option awards granted 0 0
Amended and Restated 2000 Incentive Plan [Member] | Performance Vested Restricted Stock [Member] | Officer [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Restricted stock awards 15,000 12,000
Vesting period 3 years  
Amended and Restated 2000 Incentive Plan [Member] | Performance Vested Restricted Stock [Member] | Officer [Member] | Third Anniversary [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share-based compensation vesting percentage 100.00%  
Amended and Restated 2000 Incentive Plan [Member] | Time Vested Restricted Stock [Member] | Officers and Key Employees [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Restricted stock awards 12,000 11,000
Vesting period 3 years  
Amended and Restated 2000 Incentive Plan [Member] | Time Vested Restricted Stock [Member] | Officers and Key Employees [Member] | Share-based Compensation Award, Tranche One [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share-based compensation vesting percentage 33.33%  
Amended and Restated 2000 Incentive Plan [Member] | Time Vested Restricted Stock [Member] | Officers and Key Employees [Member] | Share-based Compensation Award, Tranche Two [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share-based compensation vesting percentage 33.33%  
Amended and Restated 2000 Incentive Plan [Member] | Time Vested Restricted Stock [Member] | Officers and Key Employees [Member] | Share-based Compensation Award, Tranche Three [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share-based compensation vesting percentage 33.33%  
Amended and Restated 2000 Incentive Plan [Member] | Time Vested Restricted Stock [Member] | Director [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Restricted stock awards 7,000 5,000
Vesting period 1 year  
Amended and Restated 2000 Incentive Plan [Member] | Time Vested Restricted Stock [Member] | Director [Member] | First Anniversary [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share-based compensation vesting percentage 100.00%  
Amended and Restated 2000 Incentive Plan [Member] | Stock Option and Restricted Stock Awards [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Stock based compensation expense $ 206 $ 106
Income tax benefit to stock based compensation $ 73 $ 37