Stock-Based Compensation - Assumptions to Estimate Fair Value of Option Grants (Parenthetical) (Detail) (USD $)	9 Months Ended	12 Months Ended
	Dec. 31, 2013	Mar. 31, 2013
Black Scholes Based Option Pricing Model | 2014 $3.03 Value Per Option
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted-average value per option granted	$ 3.03
Black Scholes Based Option Pricing Model | 2014 $3.01 Value Per Option
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted-average value per option granted	$ 3.01
Black Scholes Based Option Pricing Model | 2013 $3.05 Value Per Option
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted-average value per option granted	$ 3.05	$ 3.05
Black Scholes Based Option Pricing Model | 2013 $3.02 Value Per Option
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted-average value per option granted	$ 3.02	$ 3.02
Black Scholes Based Option Pricing Model | 2013 $3.02 Value Per Option
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted-average value per option granted	$ 3.02	$ 3.02
Black Scholes Based Option Pricing Model | 2013 $2.82 Value Per Option
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted-average value per option granted	$ 2.82	$ 2.82
Monte Carlo Simulation | 2014 $1.90 Value Per Option
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted-average value per option granted	$ 1.90
Monte Carlo Simulation | 2014 $1.71 Value Per Option
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted-average value per option granted	$ 1.71
Monte Carlo Simulation | 2013 $1.86 Value Per Option
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted-average value per option granted	$ 1.86	$ 1.86
Monte Carlo Simulation | 2013 $1.75 Value Per Option
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted-average value per option granted	$ 1.75	$ 1.75
Monte Carlo Simulation | 2013 $1.75 Value Per Option
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted-average value per option granted	$ 1.75	$ 1.75