Income Taxes - Summary of Effective Tax Rate Before Income Taxes Varies from Current US Federal Statutory Income Tax Rate (Detail) |
12 Months Ended | |
|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
|
| Income Tax Disclosure [Abstract] | ||
| Statutory rate | 35.00% | 35.00% |
| State and local taxes | 1.01% | (0.53%) |
| Permanent differences | (2.40%) | (2.34%) |
| Tax credits | 1.03% | 1.00% |
| Foreign operations | (0.34%) | (5.86%) |
| Uncertain tax positions | (0.26%) | (0.69%) |
| Valuation allowance | (29.01%) | |
| Other | (2.59%) | 0.27% |
| Effective Income Tax Rate, Continuing Operations, Total | 2.44% | 26.85% |