Note 13 - Stock Based Compensation (Details) - Assumptions Used in the Determination of the Fair Value of the Options Granted |
12 Months Ended | |
|---|---|---|
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| December 2015 Options [Member] | ||
| Note 13 - Stock Based Compensation (Details) - Assumptions Used in the Determination of the Fair Value of the Options Granted [Line Items] | ||
| Expected volatility rate | 43.08% | |
| Expected dividend yield | 1.72% | |
| Risk-free interest rate | 1.67% | |
| Expected forfeiture rate | 0.00% | |
| Expected term in years | 4 years 6 months | |
| December 2014 Options [Member] | ||
| Note 13 - Stock Based Compensation (Details) - Assumptions Used in the Determination of the Fair Value of the Options Granted [Line Items] | ||
| Expected volatility rate | 41.48% | |
| Expected dividend yield | 4.23% | |
| Risk-free interest rate | 1.25% | |
| Expected forfeiture rate | 0.00% | |
| Expected term in years | 4 years 6 months | |