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Note 2 - (Loss) Income Per Share (Details Textual) - shares
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) 240,000  
Share-based Payment Arrangement, Option, Exercise Price Range, Shares Outstanding, Ending Balance (in shares) 0 0