Income Taxes - Tax credit carryforwards (Details) - USD ($) $ in Thousands |
Dec. 31, 2016 |
Dec. 31, 2015 |
|---|---|---|
| Tax credit carryforwards | ||
| Uncertain tax position | $ 0 | |
| Unrecognized tax benefits | 0 | $ 0 |
| Federal | ||
| Tax credit carryforwards | ||
| Tax credits | 2,300 | |
| State | ||
| Tax credit carryforwards | ||
| Tax credits | $ 1,500 |
| X | ||||||||||
- Definition Amount recognized for uncertainty in income taxes classified as current. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The amount of the tax credit carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
|
| X | ||||||||||
- Definition Amount of unrecognized tax benefits. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|