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Note 18 - Stockholders' Equity (Details Textual) - shares
Dec. 31, 2020
Dec. 31, 2019
Preferred Stock, Shares Authorized (in shares) 975,150 975,150
Series A Preferred Stock [Member]    
Preferred Stock, Shares Authorized (in shares) 24,850 24,850
Preferred Stock, Shares Outstanding, Ending Balance (in shares) 0