Stock-Based Compensation - Additional Information (Detail) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015	Jun. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures	1,760
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	42,385.418	40,625.418
Common stock options granted (in shares)		1,600
Number of shares forfeited	0
2014 Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock options available for grant (in shares)	1,635.846		44,021.264
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	1,760.000
Stock-based compensation expense	$ 0
Unrecognized compensation expense for unvested options	$ 5,990,000
Weighted average period required for recognition of compensation expense	3 years 9 months 16 days
2014 Equity Incentive Plan [Member] | Time Based Vesting [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock options granted (in shares)	880.000
Dividend yield	0.00%
Risk free interest rate, minimum	1.70%
Risk-free interest rate, maximum	1.72%
Expected volatility	31.50%
Expected term	6 years 9 months
Fair value of option (in usd per share)	$ 426.490
2014 Equity Incentive Plan [Member] | Performance Based Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 0
2014 Equity Incentive Plan [Member] | Performance Based Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock options available for grant (in shares)	20,742.709
2014 Equity Incentive Plan [Member] | Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted Stock or Unit Expense	$ 204,000