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Note 11 - Income Taxes - Provision for Income Taxes (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Oct. 31, 2019
Jul. 31, 2019
Apr. 30, 2019
Jan. 31, 2019
Oct. 31, 2018
Jul. 31, 2018
Apr. 30, 2018
Jan. 31, 2018
Oct. 31, 2019
Oct. 31, 2018
Oct. 31, 2017
Federal (1) [1]                
State (2) [2]                 2,449 3,626 1,371
Total current income tax expense:                 2,449 3,626 1,371
Federal                 275,688
State                 9,890
Total deferred income tax expense:                 285,578
Total $ 1,221 $ 537 $ 345 $ 346 $ 1,939 $ 1,104 $ 245 $ 338 $ 2,449 $ 3,626 $ 286,949
[1] The current federal income tax expense is net of the use of federal net operating losses totaling $0.8 million for the year ended October 31, 2019. The current federal income tax expense did not include the use of federal net operating losses for the years ended October 31, 2018 and 2017.
[2] The current state income tax expense is net of the use of state net operating losses totaling $1.3 million, $4.4 million and $18.2 million for the years ended October 31, 2019, 2018 and 2017, respectively.