Annual report pursuant to Section 13 and 15(d)

Note 10 - Share-based Awards and Cash-based Awards - Schedule of Outstanding Restricted Shares Issued to Non-employee Directors (Details)

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Note 10 - Share-based Awards and Cash-based Awards - Schedule of Outstanding Restricted Shares Issued to Non-employee Directors (Details) - Restricted Stock [Member] - shares
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Awards expected to vest by period (in shares) 154,128 123,180 181,832 246,528
Vesting in 2021 [Member]        
Awards expected to vest by period (in shares) 138,676      
Vesting in 2022 [Member]        
Awards expected to vest by period (in shares) 15,452