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Redeemable Preferred Stock - Additional Information (Details) |  |  |  |  |  |  |  |  | 1 Months Ended | 3 Months Ended | 12 Months Ended |  |  |  |  |  |  |  |  |  |  |  |  |
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Dec. 31, 2020 CAD ($) | Oct. 30, 2019 USD ($) | Aug. 15, 2019 USD ($) | May 15, 2019 USD ($) | Feb. 21, 2019 USD ($) TradingDay $ / shares | Dec. 01, 2018 USD ($) Installment | Nov. 01, 2017 USD ($) Installment | Mar. 31, 2005 shares | Jul. 03, 2019 $ / shares | Aug. 31, 2018 USD ($) $ / shares shares | Oct. 31, 2019 USD ($) $ / shares shares | Jul. 31, 2019 USD ($) | Apr. 30, 2019 USD ($) | Jan. 31, 2019 USD ($) | Oct. 31, 2018 USD ($) $ / shares shares | Jul. 31, 2018 USD ($) | Apr. 30, 2018 USD ($) | Jan. 31, 2018 USD ($) | Oct. 31, 2019 USD ($) TradingDay $ / shares shares | Oct. 31, 2019 CAD ($) TradingDay shares | Oct. 31, 2018 USD ($) $ / shares shares | Oct. 31, 2018 CAD ($) shares | Oct. 31, 2017 USD ($) $ / shares shares | Oct. 31, 2017 CAD ($) shares | Dec. 31, 2021 CAD ($) | Oct. 31, 2019 CAD ($) $ / shares shares | Oct. 01, 2019 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 | Oct. 31, 2018 CAD ($) shares | Aug. 27, 2018 $ / shares | Aug. 26, 2018 $ / shares | Sep. 30, 2017 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 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 3,231,000 |  | $ 3,200,000 |  | $ 3,200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative liability, fair value, gross liability |  |  |  |  |  |  |  |  |  |  | $ 600,000 |  |  |  | $ 800,000 |  |  |  | $ 600,000 |  | $ 800,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
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 | 1,496,368 | 1,496,368 | 9,058 | 9,058 |  |  |  |  |  |  |  |  |  |  |  |  |
Sale of common stock (in shares) | shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 119,128,677 | 119,128,677 | 476,265 | 476,265 | 603,786 | 603,786 |  |  |  |  |  |  |  |  |  |  |  |  |
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 |  |  |  |  | 30,680 |  |  |  |  |  | 30,680 |  |  |  |  |  |  |  |  |  |  |  |  | 30,680 |  |  |
Redemption price percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 125.00% | 125.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock, initial convertible shares | shares |  |  |  |  |  |  |  |  |  | 1,852,657 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion of stock conversion price | $ / shares |  |  |  |  |  |  |  |  |  | $ 16.56 | $ 16.56 |  |  |  | $ 16.56 |  |  |  | $ 16.56 |  | $ 16.56 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Issuance of preferred stock |  |  |  |  |  |  |  |  |  | $ 25,300,000 |  |  |  |  |  |  |  |  | $ 0 |  | $ 25,317,000 |  | $ 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock shares outstanding | shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 30,680 |  |  |  |  |  | 30,680 |  |  |  |  |  | 0 |  |  |  |  |  |  | 30,680 |  |  |
Temporary equity, carrying amount, attributable to parent |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 27,392,000 |  |  |  |  |  | $ 27,392,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion right description |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | The Series D Preferred Shares were convertible into shares of the Company’s common stock, subject to the requirements of Nasdaq Listing Rule 5635(d) and the beneficial ownership limitation provided in the Series D Certificate of Designation, at a conversion price equal to $16.56 per share of common stock, subject to adjustment as provided in the Series D Certificate of Designation, including adjustments if the Company sold shares of common stock or equity securities convertible into or exercisable for shares of common stock, at prices below $16.56 per share, in certain types of transactions | The Series D Preferred Shares were convertible into shares of the Company’s common stock, subject to the requirements of Nasdaq Listing Rule 5635(d) and the beneficial ownership limitation provided in the Series D Certificate of Designation, at a conversion price equal to $16.56 per share of common stock, subject to adjustment as provided in the Series D Certificate of Designation, including adjustments if the Company sold shares of common stock or equity securities convertible into or exercisable for shares of common stock, at prices below $16.56 per share, in certain types of transactions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of consecutive trading days | TradingDay |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5 | 5 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Threshold percentage of reserved for issuance of common stock issuable upon conversion |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 150.00% | 150.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Threshold amount to declare default amounts due on agreement |  |  |  |  |  |  |  |  |  |  | $ 750,000 |  |  |  |  |  |  |  | $ 750,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock redemption maturity date |  |  |  |  |  | Mar. 01, 2020 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of preferred stock redemption equal installments | Installment |  |  |  |  |  | 31 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Redemption of preferred shares in installments, each installment amount |  |  |  |  |  | $ 989,677 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reserving percentage of common stock to conversion of preferred shares |  |  |  |  |  | 150.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Premium percentage of preferred stock installment amount |  |  |  |  |  | 8.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayment percentage of installment amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 108.00% | 108.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred shares, triggering event redemption terms |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Redemption Upon a Triggering Event. In the event of a triggering event (as defined in the Series D Certificate of Designation and summarized above), the holders of Series D Preferred Shares could require the Company to redeem such Series D Preferred Shares in cash at a price equal to the greater of (a) 125% of the stated value of the Series D Preferred Shares being redeemed plus accrued dividends, if any, and (b) the market value of the number of shares issuable on conversion of the Series D Preferred Shares, valued at the greatest closing sales price during the period from the date immediately before the triggering event through the date the Company made the redemption payment. | Redemption Upon a Triggering Event. In the event of a triggering event (as defined in the Series D Certificate of Designation and summarized above), the holders of Series D Preferred Shares could require the Company to redeem such Series D Preferred Shares in cash at a price equal to the greater of (a) 125% of the stated value of the Series D Preferred Shares being redeemed plus accrued dividends, if any, and (b) the market value of the number of shares issuable on conversion of the Series D Preferred Shares, valued at the greatest closing sales price during the period from the date immediately before the triggering event through the date the Company made the redemption payment. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock, redemption accretion value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 3,800,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Convertible preferred stock, converted into common stock | shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 30,680 | 30,680 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock deemed dividends |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 6,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred Stock, Liquidation Preference, Value |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 30,680,000 |  |  |  |  |  | $ 30,680,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Series D Preferred Stock [Member] | Volume Weighted Average Price [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of common stock on trading day immediately prior to applicable installment date |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 87.50% | 87.50% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Series D Preferred Stock [Member] | Arithmetic Average Of Two Lowest Volume Weighted Average Price [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of common stock on trading day immediately prior to applicable installment date |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 87.50% | 87.50% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock consecutive trading day | TradingDay |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10 | 10 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Series D Preferred Stock [Member] | Convertible Preferred Offering [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion terms, increase beneficial ownership limitation percentage upon notice periods |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 60 days | 60 days |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of lowest volume weighted average price of common stock considered as conversion price |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 85.00% | 85.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
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% | 20.00% | 20.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reduced conversion price | $ / shares |  |  |  |  |  |  |  |  | $ 0.14 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Series D Preferred Stock [Member] | Minimum [Member] | Convertible Preferred Offering [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion terms, beneficial ownership limitation, percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4.99% | 4.99% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion terms, prior receiving beneficial ownership, percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 20.00% | 20.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Series D Preferred Stock [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reduced conversion price | $ / shares |  |  |  |  |  |  |  |  | $ 0.61 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Series D Preferred Stock [Member] | Maximum [Member] | Convertible Preferred Offering [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion terms, beneficial ownership increase, percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 9.99% | 9.99% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Series C Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock sale of shares | shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 8,992 |  |  |  |  |  | 8,992 |  |  |  |  |  |  |  |  |  |  |  |  | 8,992 |  |  | 33,500
Redemption price percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 125.00% | 125.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion of stock conversion price | $ / shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 18.00 |  |  |  |  |  | $ 18.00 |  | $ 22.08 |  |  |  |  |  |  |  |  |  |  |  | $ 18.00 | $ 22.08 |
Proceeds from Issuance of preferred stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 0 |  | $ 0 |  | $ 27,866,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock shares outstanding | shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 8,992 |  |  |  |  |  | 8,992 |  |  |  |  |  |  | 0 |  |  |  |  |  | 8,992 |  |  |
Temporary equity, carrying amount, attributable to parent |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 7,480,000 |  |  |  |  |  | $ 7,480,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock redemption maturity date |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Mar. 01, 2019 | Mar. 01, 2019 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of preferred stock redemption equal installments | Installment |  |  |  |  |  |  | 33 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Redemption of preferred shares in installments, each installment amount |  |  |  |  |  |  | $ 1,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock consecutive trading day | TradingDay |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10 | 10 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayment percentage of installment amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 108.00% | 108.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred shares, triggering event redemption terms |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Redemption. In the event of a triggering event, as defined in the Series C Certificate of Designations, the holders of the Series C Preferred Shares could force redemption at a price equal to the greater of (a) the conversion amount to be redeemed multiplied by 125% and (b) the product of (i) the conversion rate with respect to the conversion amount in effect at such time as such holder delivers a triggering event redemption notice multiplied by (ii) the greatest closing sale price of the common stock on any trading day during the period commencing on the date immediately preceding such triggering event and ending on the date the Company makes the entire payment required. | Redemption. In the event of a triggering event, as defined in the Series C Certificate of Designations, the holders of the Series C Preferred Shares could force redemption at a price equal to the greater of (a) the conversion amount to be redeemed multiplied by 125% and (b) the product of (i) the conversion rate with respect to the conversion amount in effect at such time as such holder delivers a triggering event redemption notice multiplied by (ii) the greatest closing sale price of the common stock on any trading day during the period commencing on the date immediately preceding such triggering event and ending on the date the Company makes the entire payment required. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
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 redemption terms |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Installment Payments Prior to Execution of Waiver Agreement. On November 1, 2017 and on the 16th day and 1st day of each calendar month thereafter until March 1, 2019, subject to extension in certain circumstances (the “Series C Maturity Date”), inclusive, the Company was required to redeem the stated value of Series C Preferred Shares in 33 equal installments of approximately $1.0 million (each bimonthly amount, a “Series C Installment Amount” and the date of each such payment, a “Series C Installment Date”). The holders had the ability to defer installment payments, but not beyond the Series C Maturity Date. In addition, during each period commencing on the 11th trading day prior to a Series C Installment Date and prior to the immediately subsequent Series C Installment Date, the holders could elect to accelerate the conversion of Series C Preferred Shares at the then applicable installment conversion price, provided that the holders could not elect to effect any such acceleration during such installment period if either (a) in the aggregate, all the accelerations in such installment period would exceed the sum of three other Series C Installment Amounts, or (b) the number of Series C Preferred Shares subject to prior accelerations would exceed in the aggregate 12 Series C Installment Amounts. | Installment Payments Prior to Execution of Waiver Agreement. On November 1, 2017 and on the 16th day and 1st day of each calendar month thereafter until March 1, 2019, subject to extension in certain circumstances (the “Series C Maturity Date”), inclusive, the Company was required to redeem the stated value of Series C Preferred Shares in 33 equal installments of approximately $1.0 million (each bimonthly amount, a “Series C Installment Amount” and the date of each such payment, a “Series C Installment Date”). The holders had the ability to defer installment payments, but not beyond the Series C Maturity Date. In addition, during each period commencing on the 11th trading day prior to a Series C Installment Date and prior to the immediately subsequent Series C Installment Date, the holders could elect to accelerate the conversion of Series C Preferred Shares at the then applicable installment conversion price, provided that the holders could not elect to effect any such acceleration during such installment period if either (a) in the aggregate, all the accelerations in such installment period would exceed the sum of three other Series C Installment Amounts, or (b) the number of Series C Preferred Shares subject to prior accelerations would exceed in the aggregate 12 Series C Installment Amounts. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Adjusted conversion price | $ / shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 18.00 |  |  |  |  |  | $ 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 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred Stock, Liquidation Preference, Value |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 8,992,000 |  |  |  |  |  | $ 8,992,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Series C Preferred Stock [Member] | Waiver Agreement [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Temporary equity, carrying amount, attributable to parent |  |  |  |  | $ 13,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
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 VWAPs 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 VWAPs 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. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
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 shares will receive upon conversion prior to execution of waiver agreement |  |  |  |  | 25.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion price of preferred stock | $ / shares |  |  |  |  | $ 4.45 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
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 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
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] | Volume Weighted Average Price [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of common stock on trading day immediately prior to applicable installment date |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 87.50% | 87.50% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Series C Preferred Stock [Member] | Arithmetic Average Of Two Lowest Volume Weighted Average Price [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of common stock on trading day immediately prior to applicable installment date |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 87.50% | 87.50% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Series C Preferred Stock [Member] | Convertible Preferred Offering [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion of stock conversion price | $ / shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 22.08 |  |
Proceeds from Issuance of preferred stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 27,900,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion right description |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Conversion Rights. The Series C Preferred Shares were convertible into shares of common stock, subject to the beneficial ownership limitations provided in the Certificate of Designations, Preferences and Rights of the Series C Preferred Stock of the Company (the “Series C Certificate of Designations”), at a conversion price equal to $22.08 per share. The conversion price was subject to adjustment as provided in the Series C Certificate of Designations, including adjustments if the Company sold shares of common stock or equity securities convertible into or exercisable for shares of common stock, at variable prices below the conversion price then in effect. In the event of a triggering event (as defined in the Series C Certificate of Designations), the Series C Preferred Shares would have been convertible into shares of common stock at a conversion price equal to the lower of the conversion price then in effect and 85% of the lowest VWAP of the common stock of the five trading days immediately prior to delivery of the applicable conversion notice. The holders were prohibited from converting Series C Preferred Shares into shares of common stock if, as a result of such conversion, such holder, together with its affiliates, would own more than 8.99% of the total number of shares of common stock then issued and outstanding. Each holder had the right to increase its maximum percentage up to 9.99% upon 60 days’ notice to the Company. | Conversion Rights. The Series C Preferred Shares were convertible into shares of common stock, subject to the beneficial ownership limitations provided in the Certificate of Designations, Preferences and Rights of the Series C Preferred Stock of the Company (the “Series C Certificate of Designations”), at a conversion price equal to $22.08 per share. The conversion price was subject to adjustment as provided in the Series C Certificate of Designations, including adjustments if the Company sold shares of common stock or equity securities convertible into or exercisable for shares of common stock, at variable prices below the conversion price then in effect. In the event of a triggering event (as defined in the Series C Certificate of Designations), the Series C Preferred Shares would have been convertible into shares of common stock at a conversion price equal to the lower of the conversion price then in effect and 85% of the lowest VWAP of the common stock of the five trading days immediately prior to delivery of the applicable conversion notice. The holders were prohibited from converting Series C Preferred Shares into shares of common stock if, as a result of such conversion, such holder, together with its affiliates, would own more than 8.99% of the total number of shares of common stock then issued and outstanding. Each holder had the right to increase its maximum percentage up to 9.99% upon 60 days’ notice to the Company. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion terms, increase beneficial ownership limitation percentage upon notice periods |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 60 days | 60 days |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of lowest volume weighted average price of common stock considered as conversion price |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 85.00% | 85.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate number of shares issued | shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 33,500 | 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 C Preferred Stock [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Adjusted conversion price | $ / shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1.27 |  |  |  |  |  |  |  |  |
Series C Preferred Stock [Member] | Minimum [Member] | Convertible Preferred Offering [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion terms, beneficial ownership limitation, percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 8.99% | 8.99% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Series C Preferred Stock [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Adjusted conversion price | $ / shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 4.45 |  |  |  |  |  |  |  |
Series C Preferred Stock [Member] | Maximum [Member] | Convertible Preferred Offering [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion terms, beneficial ownership increase, percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 9.99% | 9.99% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
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 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,600,000 |  | $ 3,200,000 |  | $ 3,200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative unpaid dividends |  |  |  |  |  |  |  |  |  |  | $ 1,600,000 |  |  |  | $ 0 |  |  |  | 1,600,000 |  | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends declared |  |  | $ 0 | $ 0 |  |  |  |  |  |  | 821,000 | $ 810,000 | $ 800,000 | $ 800,000 | 800,000 | $ 800,000 | $ 800,000 | $ 800,000 | 3,231,000 |  | 3,200,000 |  | $ 3,200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends payment date |  | Nov. 15, 2019 | Aug. 15, 2019 | May 15, 2019 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate amount of dividend payment |  | $ 2,400,000 | $ 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 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividend payment terms |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | quarterly | quarterly |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percent calculated on weighted average price of common stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | the number of shares of common stock was to be determined by dividing the cash dividend obligation by 95% of the volume weighted average price in U.S. dollars | the number of shares of common stock was to be determined by dividing the cash dividend obligation by 95% of the volume weighted average price in U.S. dollars |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percent of common stock price |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 95.00% | 95.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock, redemption price per share | $ / shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 25.00 |  |  |  |  |  |  |  |  |  |  |
Preferred stock exchange right per common stock share |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 19,974.24 |  |  |  |  |  |  |  |  |  |  |
Return of capital and dividend payments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 300,000 |  | $ 1,300,000 |  | $ 1,300,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Interest expense, other |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 3,000,000 |  | $ 2,800,000 |  | $ 2,600,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Carrying value of preferred shares, total |  |  |  |  |  |  |  |  |  |  | $ 17,200,000 |  |  |  | $ 15,900,000 |  |  |  | $ 17,200,000 |  | $ 15,900,000 |  |  |  |  | $ 22,700,000 |  |  |  |  |  |  |  | $ 20,900,000 |  |  |
Class A Cumulative Redeemable Exchangeable Preferred Shares [Member] | Scenario Forecast [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock, dividend rate, percentage | 5.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accrued and unpaid dividend obligation | $ 21,100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 26,500,000 |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock, redemption amount | $ 4,400,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 3,500,000 |  |  |  |  |  |  |  |  |  |  |  |
Assumed Class A Cumulative Redeemable Exchangeable Preferred Shares [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sale of stock price per share | $ / shares |  |  |  |  |  |  |  |  |  |  | $ 0.24 |  |  |  |  |  |  |  | $ 0.24 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exchange rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.32 |  |  |  |  |  |  |  |  |  |  |
Sale of common stock (in shares) | shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,234,279 | 1,234,279 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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