Note 2 - Supplemental Cash Flow Information - Schedule of Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Interest | $ 66 | $ 86 | $ 103 |
| Income taxes, net of refunds | $ 3,562 | $ 1,459 | $ 3,259 |