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Redeemable Preferred Stock - Additional Information (Details) |  |  |  |  | 1 Months Ended | 3 Months Ended | 12 Months Ended |  |  |  |  |  |  |  |  |  |
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Aug. 15, 2019 USD ($) | May 15, 2019 USD ($) | Feb. 21, 2019 USD ($) TradingDay $ / shares | Mar. 31, 2005 shares | Jul. 03, 2019 $ / shares | Aug. 31, 2018 USD ($) $ / shares shares | Oct. 31, 2020 USD ($) $ / shares shares | Jul. 31, 2020 USD ($) | Apr. 30, 2020 USD ($) | Jan. 31, 2020 USD ($) | Oct. 31, 2019 USD ($) $ / shares shares | Jul. 31, 2019 USD ($) | Apr. 30, 2019 USD ($) | Jan. 31, 2019 USD ($) | Apr. 30, 2018 USD ($) | Oct. 31, 2020 USD ($) TradingDay $ / shares shares | Oct. 31, 2020 CAD ($) TradingDay | Oct. 31, 2019 USD ($) $ / shares shares | Oct. 31, 2019 CAD ($) shares | Oct. 31, 2018 USD ($) $ / shares shares | Oct. 31, 2018 CAD ($) shares | Oct. 31, 2017 USD ($) shares | Oct. 31, 2020 CAD ($) shares | Oct. 31, 2019 CAD ($) shares | May 23, 2019 $ / shares shares | May 22, 2019 $ / shares | May 08, 2019 shares | Jan. 02, 2019 $ / shares | Dec. 17, 2018 $ / shares | Dec. 03, 2018 $ / shares | Aug. 27, 2018 $ / shares | Aug. 26, 2018 $ / shares
Class Of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock, shares authorized | shares |  |  |  |  |  |  |  |  |  |  | 250,000 |  |  |  |  |  |  | 250,000 |  |  |  |  |  | 250,000 |  |  | 250,000 |  |  |  |  |
Preferred stock, par value | $ / shares |  |  |  |  |  |  |  |  |  |  | $ 0.01 |  |  |  |  |  |  | $ 0.01 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Redemption value adjustment of net loss attributable to common stockholders |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 8,600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends declared |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 3,200,000 |  |  |  |  |  |  |  |  |  |  |  |
Derivative liability, fair value, gross liability |  |  |  |  |  |  | $ 600,000 |  |  |  | $ 600,000 |  |  |  |  | $ 600,000 |  | $ 600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Convertible preferred stock, converted into number of common stock shares | shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,914,218 | 3,914,218 |  |  |  |  |  |  |  |  |  |  |  |  |
Waiver Agreement [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Decrease in net loss attributable to common shareholders |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Installment and Optional Conversions, Triggering Event Conversions of Series D Preferred Stock to Common Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion of common stock, shares issued | shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 62,040,496 | 62,040,496 |  |  |  |  |  |  |  |  |  |  |  |  |
Convertible preferred stock, reduction in carrying amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 31,200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Installment Conversion of Series C Preferred Stock to Common Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Convertible preferred stock, reduction in carrying amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 20,200,000 |  |  |  |  |  |  |  |  |  |  |  |
Series D Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock sale of shares | shares |  |  |  |  |  | 30,680 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock, initial convertible shares | shares |  |  |  |  |  | 1,852,657 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion of stock conversion price | $ / shares |  |  |  |  |  | $ 16.56 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Issuance of preferred stock |  |  |  |  |  | $ 25,300,000 |  |  |  |  |  |  |  |  |  | $ 0 |  | $ 0 |  | $ 25,317,000 |  |  |  |  |  |  |  |  |  |  |  |
Convertible preferred stock, converted into common stock | shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 30,680 | 30,680 |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock deemed dividends |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 6,000,000.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock, redemption accretion value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 3,800,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Series D Preferred Stock [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock, conversion basis, stock issuance, threshold percentage of outstanding voting stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 20.00% | 20.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Reduced conversion price | $ / shares |  |  |  |  | $ 0.14 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Series D Preferred Stock [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reduced conversion price | $ / shares |  |  |  |  | $ 0.61 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Series D Preferred Stock [Member] | Convertible Preferred Offering [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion terms, prior receiving beneficial ownership, percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 20.00% | 20.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Series C Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock sale of shares | shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 8,992 |  |  |  |  |  |  |  |  |  |  |  |
Conversion of stock conversion price | $ / shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 18.00 | $ 22.08
Convertible preferred stock, converted into common stock | shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 8,992 | 8,992 | 24,308 | 24,308 |  |  |  |  |  |  |  |  |  |  |
Convertible preferred stock, reduction in carrying amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 15,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock deemed dividends |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,500,000 |  | $ 9,600,000 |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock shares outstanding | shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 8,992 |  |  |  |  | 0 |  |  |  |  |  |  |
Temporary equity, carrying amount, attributable to parent |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 7,500,000 |  |  |  |  |  |  |  |  |  |  |  |
Adjusted conversion price | $ / shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 18.00 |  |  |  |  |  |  |  | $ 5.16 | $ 6.00 | $ 6.96 |  |
Convertible preferred stock, converted into number of common stock shares | shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,914,218 | 3,914,218 |  |  |  |  |  |  |  |  |  |  |  |  |
Series C Preferred Stock [Member] | Common Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Convertible preferred stock, converted into number of common stock shares | shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,496,368 | 1,496,368 |  |  |  |  |  |  |  |  |  |  |
Series C Preferred Stock [Member] | Waiver Agreement [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Temporary equity, carrying amount, attributable to parent |  |  | $ 13,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of shares will receive upon conversion prior to execution of waiver agreement |  |  | 25.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion right description |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Under the Waiver Agreement, the conversion price of the Series C Preferred Stock was stated to be the lowest of (i) $4.45, (ii) 85% of the lowest closing bid price of the Company’s common stock during the period beginning on and including the fifth trading day prior to the date on which the applicable conversion notice was delivered to the Company and ending on and including the date on which the applicable conversion notice was delivered to the Company, and (iii) 85% of the quotient of (A) the sum of the five lowest volume weighted average prices of the Company’s common stock during the 20 consecutive trading day period ending on and including the trading day immediately preceding the applicable conversion date divided by (B) five. | Under the Waiver Agreement, the conversion price of the Series C Preferred Stock was stated to be the lowest of (i) $4.45, (ii) 85% of the lowest closing bid price of the Company’s common stock during the period beginning on and including the fifth trading day prior to the date on which the applicable conversion notice was delivered to the Company and ending on and including the date on which the applicable conversion notice was delivered to the Company, and (iii) 85% of the quotient of (A) the sum of the five lowest volume weighted average prices of the Company’s common stock during the 20 consecutive trading day period ending on and including the trading day immediately preceding the applicable conversion date divided by (B) five. |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion price of preferred stock | $ / shares |  |  | $ 4.45 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of lowest volume weighted average price of common stock considered as conversion price |  |  | 85.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of consecutive trading days | TradingDay |  |  | 20 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of conversion price of common stock |  |  | 125.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Convertible preferred stock embedded conversion amount |  |  |  |  |  |  |  |  |  |  |  |  | $ 6,600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Change in fair value of convertible preferred stock |  |  | $ (600,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of stated redemption value adjustment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 108.00% | 108.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Stated redemption value corresponding charge to common shareholders |  |  |  |  |  |  |  |  |  |  | $ 8,600,000 |  |  |  |  |  |  | $ 8,600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Series C Preferred Stock [Member] | Waiver Agreement [Member] | Volatility [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Convertible preferred stock, measurement input |  |  | 75.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Series C Preferred Stock [Member] | Waiver Agreement [Member] | Discount Rate [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Convertible preferred stock, measurement input |  |  | 20.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Series C Preferred Stock [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Adjusted conversion price | $ / shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1.27 |  |  |  |  |  |  |
Series C Preferred Stock [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Adjusted conversion price | $ / shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 4.45 |  |  |  |  |  |
Series C Preferred Stock [Member] | Convertible Preferred Offering [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Issuance of preferred stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 27,900,000 |  |  |  |  |  |  |  |  |  |
Aggregate number of shares issued | shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 33,500 |  |  |  |  |  |  |  |  |  |
Series C Preferred Stock [Member] | Convertible Preferred Offering [Member] | Waiver Agreement [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Convertible preferred stock, reduction in carrying amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 6,600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Series B Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock, shares authorized | shares |  |  |  |  |  |  | 105,875 |  |  |  | 105,875 |  |  |  |  | 105,875 |  | 105,875 |  |  |  |  | 105,875 | 105,875 |  |  |  |  |  |  |  |
Preferred stock sale of shares | shares |  |  |  | 105,875 |  |  | 64,020 |  |  |  | 64,020 |  |  |  |  | 64,020 |  | 64,020 |  |  |  |  | 64,020 | 64,020 |  |  |  |  |  |  |  |
Redemption price percentage |  |  |  | 5.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock shares outstanding | shares |  |  |  |  |  |  | 64,020 |  |  |  | 64,020 |  |  |  |  | 64,020 |  | 64,020 |  |  |  |  | 64,020 | 64,020 |  |  |  |  |  |  |  |
Temporary equity, carrying amount, attributable to parent |  |  |  |  |  |  | $ 59,857,000 |  |  |  | $ 59,857,000 |  |  |  |  | $ 59,857,000 |  | $ 59,857,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of consecutive trading days | TradingDay |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 30 | 30 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock, liquidation preference per share | $ / shares |  |  |  |  |  |  | $ 1,000.00 |  |  |  | $ 1,000.00 |  |  |  |  | $ 1,000.00 |  | $ 1,000.00 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock, dividends per share, declared | $ / shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 50.00 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends, preferred stock, cash |  | $ 2,400,000 |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 4,800,000 |  | $ 1,600,000 |  | $ 3,200,000 |  |  |  |  |  |  |  |  |  |  |  |
Cumulative unpaid dividends |  |  |  |  |  |  | $ 800,000 |  |  |  | $ 2,400,000 |  |  |  |  | 800,000 |  | 2,400,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends declared | $ 0 | $ 0 |  |  |  |  | 800,000 | $ 800,000 | $ 800,000 | $ 931,000 | 821,000 | $ 810,000 | $ 800,000 | $ 800,000 |  | 3,331,000 |  | 3,231,000 |  | 3,200,000 |  |  |  |  |  |  |  |  |  |  |  |
Dividends payment date | Aug. 15, 2019 | May 15, 2019 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate amount of dividend payment | $ 1,600,000 | $ 1,600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock, dividend rate, percentage | 5.00% | 5.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock failed to pay dividend payments multiplier percentage | 0.0625% | 0.0625% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payment on junior shares |  |  |  |  |  |  | 0 |  |  |  |  |  |  |  |  | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred Stock, Liquidation Preference, Value |  |  |  |  |  |  | $ 64,020,000 |  |  |  | 64,020,000 |  |  |  |  | $ 64,020,000 |  | 64,020,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares of common stock issued upon conversion | shares |  |  |  |  |  |  | 0.591 |  |  |  |  |  |  |  |  | 0.591 |  |  |  |  |  |  | 0.591 |  |  |  |  |  |  |  |  |
Stock conversion price | $ / shares |  |  |  |  |  |  | $ 1,692.00 |  |  |  |  |  |  |  |  | $ 1,692.00 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percent of conversion price to exceed to exercise conversion right |  |  |  |  |  |  | 150.00% |  |  |  |  |  |  |  |  | 150.00% |  |  |  |  |  |  | 150.00% |  |  |  |  |  |  |  |  |
Number of trading days | TradingDay |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 20 | 20 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of voting rights |  |  |  |  |  |  | 50.00% |  |  |  |  |  |  |  |  | 50.00% |  |  |  |  |  |  | 50.00% |  |  |  |  |  |  |  |  |
Consecutive number of years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2 years | 2 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of aggregate voting power |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 100.00% | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of conversion price |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 105.00% | 105.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Discount on market price of shares of common stock |  |  |  |  |  |  | 5.00% |  |  |  |  |  |  |  |  | 5.00% |  |  |  |  |  |  | 5.00% |  |  |  |  |  |  |  |  |
Preferred stock, voting rights |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | no voting rights | no voting rights |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Series B Preferred Stock [Member] | Common Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of consecutive trading days | TradingDay |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10 | 10 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of trading days | TradingDay |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5 | 5 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Series B Preferred Stock [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of consideration excluding cash payments for fractional shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 90.00% | 90.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class A Cumulative Redeemable Exchangeable Preferred Shares [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock shares outstanding | shares |  |  |  |  |  |  | 1,000,000 |  |  |  |  |  |  |  |  | 1,000,000 |  |  |  |  |  |  | 1,000,000 |  |  |  |  |  |  |  |  |
Cumulative unpaid dividends |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 12,500,000 |  |  |  |  |  |  |  |  |
Aggregate amount of dividend payment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock, dividend rate, percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.25% | 1.25% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Return of capital payments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 750,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Return of capital and dividend payments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,600,000 | 1,900,000 | 200,000 | $ 300,000 | 1,000,000.0 | $ 1,300,000 |  |  |  |  |  |  |  |  |  |  |
Interest expense, other |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,900,000 | 4,000,000.0 | 2,300,000 | $ 3,000,000.0 | $ 2,200,000 | $ 2,800,000 |  |  |  |  |  |  |  |  |  |  |
Carrying value of preferred shares, total |  |  |  |  |  |  | $ 19,200,000 |  |  |  | $ 17,200,000 |  |  |  |  | $ 19,200,000 |  | $ 17,200,000 |  |  |  |  | 25,600,000 | $ 22,700,000 |  |  |  |  |  |  |  |
Class A Preferred Shares [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate amount of dividend payment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increase in dividend rate annually |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 15.00% | 15.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Return of capital payments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 750,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividend payment terms |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | annual | annual |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accrued and unpaid dividend obligation |  |  |  |  |  |  | 17,700,000 |  |  |  |  |  |  |  |  | $ 17,700,000 |  |  |  |  |  |  | 23,400,000 |  |  |  |  |  |  |  |  |
Loss resulted from revised fair value of preferred shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 200,000 | $ 200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends payable |  |  |  |  |  |  | 17,400,000 |  |  |  |  |  |  |  |  | 17,400,000 |  |  |  |  |  |  | 23,200,000 |  |  |  |  |  |  |  |  |
Preferred stock, redemption amount |  |  |  |  |  |  | $ 3,200,000 |  |  |  |  |  |  |  |  | $ 3,200,000 |  |  |  |  |  |  | $ 4,300,000 |  |  |  |  |  |  |  |  |
Class A Preferred Shares [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock, redemption date |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Dec. 31, 2020 | Dec. 31, 2020 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class A Preferred Shares [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock, redemption date |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Dec. 31, 2021 | Dec. 31, 2021 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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