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Note 17 - Gain on Investment in Allied Esports Entertainment, Inc. (Details Textual) - USD ($)
 12 Months Ended
Aug. 10, 2020
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2022
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)       1,591,250
Allied Esports Entertainment, Inc. [Member]        
Investment Owned, Balance, Shares (in shares) 2,685,500   177,479  
Investment Owned, Balance, Share Price (in dollars per share) $ 4.45   $ 1.58  
Investment Owned, Balance, Principal Amount $ 11,950,475   $ 280,417  
Investment Owned, Shares Sold (in shares) 537,101 177,479 1,970,920  
Proceeds from Sale of Long-Term Investments $ 73,668 $ 414,361 $ 3,108,067  
Allied Esports Entertainment, Inc. [Member] | Sponsor Warrants [Member]        
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)     505,000