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Note 13 - Share-based Compensation (Details Textual) - shares
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2021
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares) 153,000 1,054,499
Restricted Stock [Member]    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) 6,699 8,125