Employee Benefit Plan - Additional Information (Detail) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Jan. 01, 2015 |
Dec. 31, 2016 |
Dec. 31, 2015 |
|
| Defined Contribution Plan Disclosure [Line Items] | |||
| Defined contribution retirement plan, description | All employees over the age of 21 are eligible to participate in the plan after three consecutive months of service. | ||
| Employer contributions to the plan | $ 118 | $ 80 | |
| Defined contribution retirement plan, employer contribution percentage | 3.00% | ||
| Minimum [Member] | |||
| Defined Contribution Plan Disclosure [Line Items] | |||
| Defined contribution retirement plan, employee eligible age to participate | 21 years | ||
| Defined contribution retirement plan, employee eligible service period | 3 months | ||