Quarterly report pursuant to Section 13 or 15(d)

Note 8 - Stockholders' Equity - Dividend Activity (Details)

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Note 8 - Stockholders' Equity - Dividend Activity (Details) - USD ($)
$ / shares in Units, $ in Thousands
9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Dividends per share (in dollars per share) $ 0.60  
Dividends $ 6,855 $ 2,736
Dividends Declared February 10, 2020 [Member]    
Dividends per share (in dollars per share) $ 0.20  
Dividends $ 2,285  
Dividends Declared May 4, 2020 [Member]    
Dividends per share (in dollars per share) $ 0.20  
Dividends $ 2,285  
Dividends Declared August 3, 2020 [Member]    
Dividends per share (in dollars per share) $ 0.20  
Dividends $ 2,285