Stock-Based Compensation - Assumptions to Estimate Fair Value of Option Grants (Parenthetical) (Detail) - $ / shares	3 Months Ended	12 Months Ended
	Jun. 30, 2015	Mar. 31, 2015
Black Scholes Based Option Pricing Model | 2016 $3.66 Value Per Option
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted-average value per option granted	$ 3.66
Black Scholes Based Option Pricing Model | 2015 $4.61 Value Per Option
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted-average value per option granted	4.61	$ 4.61
Black Scholes Based Option Pricing Model | 2015 $3.85 Value Per Option
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted-average value per option granted	3.85	3.85
Black Scholes Based Option Pricing Model | 2015 $3.72 Value Per Option
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted-average value per option granted	3.72	3.72
Monte Carlo Simulation | 2016 $2.49 Value Per Option
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted-average value per option granted	2.49
Monte Carlo Simulation | 2015 $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
Monte Carlo Simulation | 2015 $2.49 Value Per Option
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted-average value per option granted	$ 2.49	$ 2.49