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Redeemable Preferred Stock - Dividends, Liquidations and Conversion Rights (Details) - Series B Preferred Stock - USD ($) |  |  | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | ---
Aug. 15, 2019 | May 15, 2019 | Mar. 31, 2005 | Jan. 31, 2020 | Oct. 31, 2022 | Oct. 31, 2021 | Oct. 31, 2020
Class Of Stock [Line Items] |  |  |  |  |  |  |
Preferred stock, dividends per share, declared |  |  |  |  | $ 50.00 |  |
Dividends, preferred stock, cash |  |  |  | $ 2,400,000 | $ 3,200,000 | $ 3,200,000 | $ 4,800,000
Cumulative unpaid dividends |  |  |  |  | 800,000 | 800,000 |
Dividends payment date | Aug. 15, 2019 | May 15, 2019 |  |  |  |  |
Aggregate amount of dividend payment | $ 1,600,000 | $ 1,600,000 |  |  |  |  |
Preferred stock failed to pay dividend payments multiplier percentage | 0.0625% | 0.0625% |  |  |  |  |
Payment on junior shares |  |  |  |  | $ 0 |  |
Shares of common stock issued upon conversion |  |  |  |  | 0.591 |  |
Preferred Stock, Liquidation Preference, Value |  |  |  |  | $ 64,020,000 | $ 64,020,000 | $ 64,000,000.0
Stock conversion price |  |  |  |  | $ 1,692.00 |  |
Percent of conversion price to exceed to exercise conversion right |  |  |  |  | 150.00% |  |
Preferred stock, dividend rate, percentage | 5.00% | 5.00% | 5.00% |  | 5.00% | 5.00% | 5.00%
Preferred stock, liquidation preference per share |  |  |  |  | $ 1,000.00 |  |
Number of trading days |  |  |  |  | 20 days |  |
Number of consecutive trading days |  |  |  |  | 30 days |  |

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- Definition The per share liquidation preference (or restrictions) of nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) that has a preference in involuntary liquidation considerably in excess of the par or stated value of the shares. The liquidation preference is the difference between the preference in liquidation and the par or stated values of the share. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(d)) -URI https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI https://asc.fasb.org/extlink&oid=126973232&loc=d3e21475-112644 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (h) -URI https://asc.fasb.org/extlink&oid=126973232&loc=SL123496158-112644 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 4 -URI https://asc.fasb.org/extlink&oid=126973232&loc=d3e21484-112644 + Details
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