Annual report pursuant to Section 13 and 15(d)

Note 13 - Subsequent Event (Details Textual)

v3.20.4
Note 13 - Subsequent Event (Details Textual) - $ / shares
 3 Months Ended 12 Months Ended
Feb. 08, 2021
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2020
Dec. 31, 2019
Common Stock, Dividends, Per Share, Declared (in dollars per share)   $ 0.20 $ 0.20 $ 0.20 $ 0.20 $ 0.80 $ 0.64
Subsequent Event [Member]              
Common Stock, Dividends, Per Share, Declared (in dollars per share) $ 0.20