Note 3 - Net Earnings Per Common Share (Details Textual) - shares |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2016 |
Sep. 30, 2015 |
Sep. 30, 2016 |
Sep. 30, 2015 |
|
| Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | 100,459 | 102,297 | 101,680 | 102,297 |