Note 7 - Income Taxes - Changes in Valuation Allowance (Details) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2017 |
Dec. 31, 2016 |
|
| Valuation allowance at the Beginning of Period | ||
| Income tax expense | (11,435) | |
| Release of valuation allowance | ||
| Valuation allowance at the End of Period | $ (11,435) | |
| X | ||||||||||
- Definition Amount of increase in the valuation allowance for deferred tax assets charged to income tax expense. No definition available.
|
| X | ||||||||||
- Definition Amount of decrease in the valuation allowance for deferred tax assets due to the release of valuation allowance. No definition available.
|
| X | ||||||||||
- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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