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Note 11 - Income Taxes - Provision for Income Taxes (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Oct. 31, 2018
Jul. 31, 2018
Apr. 30, 2018
Jan. 31, 2018
Oct. 31, 2017
Jul. 31, 2017
Apr. 30, 2017
Jan. 31, 2017
Oct. 31, 2018
Oct. 31, 2017
Oct. 31, 2016
Federal (1) [1]                 $ (2,796)
State (2) [2]                 3,626 1,371 1,200
Total current income tax expense (benefit):                 3,626 1,371 (1,596)
Federal                 275,688 5,594
State                 9,890 1,257
Total deferred income tax expense (benefit):                 285,578 6,851
Total $ 1,939 $ 1,104 $ 245 $ 338 $ 464 $ 287,036 $ (1,017) $ 466 $ 3,626 $ 286,949 $ 5,255
[1] 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. The current federal income tax benefit is net of the use of federal net operating losses totaling $4.4 million for the year ended October 31, 2016.
[2] The current state income tax expense (benefit) is net of the use of state net operating losses totaling $4.4 million, $18.2 million and $16.4 million for the years ended October 31, 2018, 2017 and 2016, respectively.