Note 2 - Income (Loss) Per Share (Details Textual) - shares	3 Months Ended
Mar. 31, 2021	Mar. 31, 2020
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures, Total (in shares)	132,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Ending Balance (in shares)	721,000	0

Number of shares issued during the period related to Restricted Stock Awards, net of any shares forfeited.

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Period Type:	duration