Income Taxes - Summary of Reconciliation of Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
Reconciliation of liability for unrecognized tax benefits | |||
Balance at beginning of period | $ 773 | $ 577 | $ 306 |
Additions based on tax positions related to current year | 161 | 176 | 123 |
Additions for tax positions of prior years | 20 | 148 | |
Balance at end of period | $ 934 | $ 773 | $ 577 |