Stock-Based Compensation - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	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			2,200
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	41,065.418		41,065.418		40,625.418
Common stock options granted (in shares)					1,600
Number of shares forfeited			1,760
Stock-based compensation expense			$ 1,118,000	$ 257,000
2014 Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock options available for grant (in shares)	2,855.846		2,855.846			44,021.264
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	2,200.000		2,200.000
Stock-based compensation expense	$ 0	$ 0	$ 726,000	0
Unrecognized compensation expense for unvested options	$ 5,372,000	$ 3,309,000	$ 5,372,000	$ 3,309,000
Weighted average period required for recognition of compensation expense			3 years 6 months 1 day
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)			1,100.000
Dividend yield			0.00%
Risk free interest rate, minimum			1.27%
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)			$ 355.629
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)	20,982.709		20,982.709
2014 Equity Incentive Plan [Member] | Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted Stock or Unit Expense	$ 0		$ 392,000