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Note 8 - Stockholders' Equity (Details Textual) - The August 2017 Share Repurchase Program [Member] - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
38 Months Ended
Oct. 31, 2020
Aug. 31, 2017
Stock Repurchase Program, Authorized Amount   $ 20.0
Stock Repurchased and Retired During Period, Shares (in shares) 1.3  
Share Price (in dollars per share) $ 8.75  
Stock Repurchased and Retired During Period, Value $ 11.2