Note 2 - Summary of Significant Accounting Policies - Retrospective Impact of Future Adoption of ASU No. 2017-07 (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
|
| Increase/(decrease) in operating income | $ (30) | $ 44 | $ 51 |
| Increase/(decrease) in other income | $ 30 | $ (44) | $ (51) |
| X | ||||||||||
- Definition Amount of the effect of a change in accounting principle on other income. No definition available.
|
| X | ||||||||||
- Definition Amount of the effect of a change in accounting principle on operating profit or loss. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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