Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - Additional Information (Detail)

v3.3.0.814
Stock-Based Compensation - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Employee Stock Purchase Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of shares authorized 200,000   200,000  
Stock based compensation expense $ 8 $ 13 $ 22 $ 30
Income tax benefit to stock based compensation $ 3 $ 4 $ 8 $ 10
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   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   250,000  
Restricted stock awards     34,000 30,000
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 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
Share-based compensation vesting percentage     100.00% 100.00%
Vesting period     3 years 3 years
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 0 2,000 7,000 7,000
Share-based compensation vesting percentage 100.00% 100.00% 100.00% 100.00%
Vesting period   1 year 1 year 1 year
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 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% 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% 33.33%
Amended and Restated 2000 Incentive Plan [Member] | Time Vested Restricted Stock [Member] | Officers and Key Employees [Member] | Third Anniversary [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation vesting percentage     33.33% 33.33%
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 $ 151 $ 163 $ 357 $ 269
Income tax benefit to stock based compensation $ 53 $ 57 $ 126 $ 94