Stock-Based Compensation - Additional Information (Detail) (USD $) | 3 Months Ended | 9 Months Ended | | |
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2014 | Dec. 31, 2013 | Mar. 31, 2014 | Mar. 31, 2013 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | |
Number of shares available for grant | 916,008 | | 916,008 | | | |
Stock-based compensation expense | | | $3,341,000 | $2,193,000 | | |
Stock-based compensation related expense reduced in basic and diluted earnings per share | $0.03 | $0.01 | $0.19 | $0.10 | | |
Unrecognized compensation costs related to non-vested stock options and restricted stock awards | 7,756,000 | | 7,756,000 | | | |
Compensation expense related to non-vested stock options and restricted stock awards, weighted average period of recognition | | | 2 years | | | |
Volatility look back period | | | 2 years 6 months | | | |
Stock and option grants, forfeiture rate | | | 10.00% | | | |
Restricted Stock Award | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | |
Restricted common stock issued and outstanding | 25,000 | 16,200 | 25,000 | 16,200 | 16,200 | 42,820 |
Restricted Stock Award | 2013 Omnibus Stock and Incentive Plan | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | |
Restricted common stock issued and outstanding | 17,700 | | 17,700 | | | |
Restricted Stock Award | 2007 Omnibus Stock and Incentive Plan | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | |
Restricted common stock issued and outstanding | 7,300 | | 7,300 | | | |
Restricted Stock Units | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | |
Restricted common stock issued and outstanding | 108,184 | 41,435 | 108,184 | 41,435 | 40,103 | 41,607 |
Restricted Stock Units | 2013 Omnibus Stock and Incentive Plan | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | |
Restricted common stock issued and outstanding | 34,219 | | 34,219 | | | |
Restricted Stock Units | 2007 Omnibus Stock and Incentive Plan | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | |
Restricted common stock issued and outstanding | 13,231 | | 13,231 | | | |
Restricted Stock Units | Executive Inducement Plan | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | |
Restricted common stock issued and outstanding | 60,734 | | 60,734 | | | |
Stock Options and Restricted Stock Awards | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | |
Stock-based compensation expense | $543,000 | $272,000 | $3,341,000 | $2,193,000 | | |
Minimum | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | |
Stock option granted term | | | 5 years | | | |
Stock options and restricted stock awards granted, vesting period | | | 1 year | | | |
Minimum | 2013 Omnibus Stock and Incentive Plan | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | |
Stock award requisite service period | | | 2 years | | | |
Minimum | Restricted Stock Award | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | |
Stock options and restricted stock awards granted, vesting period | | | 2 years | | | |
Maximum | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | |
Stock option granted term | | | 10 years | | | |
Stock options and restricted stock awards granted, vesting period | | | 3 years | | | |
Maximum | 2013 Omnibus Stock and Incentive Plan | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | |
Stock award requisite service period | | | 3 years | | | |
Maximum | Restricted Stock Award | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | |
Stock options and restricted stock awards granted, vesting period | | | 3 years | | | |