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Note 10 - Earnings (Loss) Per Share (Details Textual) - shares
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Restricted Stock [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) 13,093 417 1,630 151