Employee Benefit Plan - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	25.00%
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Amount	$ 1,500
Defined Contribution Plan, Cost Recognized	$ 13,520	$ 2,239