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Note 15 - Common Stock Purchase Agreement (Details Textual) - USD ($)
Mar. 29, 2022
Feb. 28, 2022
Nov. 30, 2021
Common Stock, Par or Stated Value Per Share (in dollars per share)   $ 0.01 $ 0.01
Alumni Capital [Member] | Subsequent Event [Member]      
Common Stock Purchase Agreement, Maximum Gross Proceeds from Issuance or Sale of Equity $ 3,000,000    
Common Stock Purchase Agreement, Maximum Shares Authorized to be Issued (in shares) 50,000    
Common Stock Purchase Agreement, Percentage of Common Shares Outstanding 9.99%    
Stock Issued During Period, Shares, New Issues (in shares) 20,000    
Common Stock Purchase Agreement, Shares to be Issued (in shares) 20,000    
Alumni Capital [Member] | Subsequent Event [Member] | Minimum [Member]      
Common Stock Purchase Agreement, Discount on Shares, Percent 3.00%    
Alumni Capital [Member] | Subsequent Event [Member] | Maximum [Member]      
Common Stock Purchase Agreement, Discount on Shares, Percent 5.00%