Note 14 - Earnings Per Share (Details Textual) - shares |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Employee Stock Option [Member] | |||
| Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | 213,101 | 302,100 | 385,100 |