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Note 11 - Income Taxes - Provision for Income Taxes (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Oct. 31, 2016
Jul. 31, 2016
Apr. 30, 2016
Jan. 31, 2016
Oct. 31, 2015
Jul. 31, 2015
Apr. 30, 2015
Jan. 31, 2015
Oct. 31, 2016
Oct. 31, 2015
Oct. 31, 2014
Federal (1) [1]                 $ (2,796) $ (1,497) $ (1,690)
State (2) [2]                 1,200 523 2,466
Total current income tax (benefit) expense:                 (1,596) (974) 776
Federal                 5,594 (8,461) (272,822)
State                 1,257 3,770 (14,918)
Total deferred income tax expense (benefit):                 6,851 (4,691) (287,740)
Total $ 9,852 $ 1,567 $ (9,143) $ 2,979 $ 11,878 $ (2,317) $ (9,922) $ (5,304) $ 5,255 $ (5,665) $ (286,964)
[1] The current federal income tax (benefit) expense is net of the use of federal net operating losses totaling $4.4 million, $3.7 million and $57.8 million for the years ended October 31, 2016, 2015 and 2014, respectively.
[2] The current state income tax (benefit) expense is net of the use of state net operating losses totaling $16.4 million, $12.3 million and $24.5 million for the years ended October 31, 2016, 2015 and 2014, respectively.