Note 11 - Senior Notes and Credit Facilities - Senior Notes and Credit Facilities Balances (Details) (Parentheticals)		6 Months Ended		12 Months Ended
		Apr. 30, 2019		Oct. 31, 2018		Jan. 15, 2019	Feb. 01, 2018	Jul. 27, 2017	Nov. 01, 2011
The 9.50% 2020 Notes [Member] | Senior Secured Notes [Member]
Debt Instrument, Interest Rate, Stated Percentage	[1],[2]	9.50%		9.50%
Debt Instrument, Maturity Date	[1],[2]	Nov. 15, 2020		Nov. 15, 2020
The 2.0% 2021 Notes [Member] | Senior Secured Notes [Member]
Debt Instrument, Interest Rate, Stated Percentage		2.00%	[1],[2]	2.00%	[1],[2]				2.00%
Debt Instrument, Maturity Date	[1],[2]	Nov. 01, 2021		Nov. 01, 2021
The 5.0% 2021 Notes [Member] | Senior Secured Notes [Member]
Debt Instrument, Interest Rate, Stated Percentage		5.00%	[1],[2]	5.00%	[1],[2]				5.00%
Debt Instrument, Maturity Date	[1],[2]	Nov. 01, 2021		Nov. 01, 2021
The 10.0% 2022 Notes [Member] | Senior Secured Notes [Member]
Debt Instrument, Interest Rate, Stated Percentage		10.00%	[1],[2]	10.00%	[1],[2]			10.00%
Debt Instrument, Maturity Date	[1],[2]	Jul. 15, 2022		Jul. 15, 2022
The 10.5% 2024 Notes [Member]
Debt Instrument, Interest Rate, Stated Percentage						10.50%
The 10.5% 2024 Notes [Member] | Senior Secured Notes [Member]
Debt Instrument, Interest Rate, Stated Percentage		10.50%		10.50%	[1],[2]
Debt Instrument, Maturity Date		Jul. 15, 2024		Jul. 15, 2024	[1],[2]
The 8.0% Senior Notes Due 2019 [Member] | Unsecured Senior Notes Excluding Senior Amortizing Notes and Senior Exchangeable Notes [Member]
Debt Instrument, Interest Rate, Stated Percentage	[1],[2]	8.00%		8.00%
Debt Instrument, Maturity Date	[1],[2]	Nov. 01, 2019		Nov. 01, 2019
The 13.5% Senior Notes Due 2026 [Member]
Debt Instrument, Interest Rate, Stated Percentage							13.50%
The 13.5% Senior Notes Due 2026 [Member] | Unsecured Senior Notes Excluding Senior Amortizing Notes and Senior Exchangeable Notes [Member]
Debt Instrument, Interest Rate, Stated Percentage		13.50%	[1],[2]	13.50%
Debt Instrument, Maturity Date		Feb. 01, 2026	[1],[2]	Feb. 01, 2026
The 5.0% Senior Notes due 2040 [Member]
Debt Instrument, Interest Rate, Stated Percentage							5.00%
The 5.0% Senior Notes due 2040 [Member] | Unsecured Senior Notes Excluding Senior Amortizing Notes and Senior Exchangeable Notes [Member]
Debt Instrument, Interest Rate, Stated Percentage		5.00%	[1],[2]	5.00%
Debt Instrument, Maturity Date		Feb. 01, 2040	[1],[2]	Feb. 01, 2040

[1] "Notes payable" on our Condensed Consolidated Balance Sheets as of April 30, 2019 and October 31, 2018 consists of the total senior secured and senior notes shown above, as well as accrued interest of $37.9 million and $35.6 million, respectively.

[2] Unamortized debt issuance costs at April 30, 2019 and October 31, 2018 were $13.0 million and $14.1 million, respectively.