Note 3 - Earnings Per Share - Shares Used in Calculation of Earnings Per Share (Details) - shares |
3 Months Ended | 12 Months Ended | ||||||||
---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2018 |
Sep. 30, 2018 |
Jun. 30, 2018 |
Mar. 31, 2018 |
Dec. 31, 2017 |
Sep. 30, 2017 |
Jun. 30, 2017 |
Mar. 31, 2017 |
Dec. 31, 2018 |
Dec. 31, 2017 |
|
Weighted-average common shares issued (in shares) | 3,616,119 | 3,415,115 | ||||||||
Average treasury stock shares (in shares) | (386,165) | (386,165) | ||||||||
Weighted-average common shares and common stock equivalents used to calculate basic earnings per share (in shares) | 3,239,180 | 3,234,393 | 3,225,726 | 3,220,262 | 3,215,300 | 3,212,335 | 3,000,451 | 2,679,816 | 3,229,954 | 3,028,950 |
Additional common stock equivalents (stock options and restricted stock) used to calculate diluted earnings per share (in shares) | 13,953 | 23,635 | ||||||||
Weighted-average common shares and common stock equivalents used to calculate diluted earnings per share (in shares) | 3,250,149 | 3,248,326 | 3,240,329 | 3,238,069 | 3,231,791 | 3,223,753 | 3,014,140 | 2,692,015 | 3,243,907 | 3,052,585 |