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Subsequent Events - Additional Information (Details) $ / shares in Units, $ in Millions |  |  |  |  |  | 1 Months Ended | 12 Months Ended |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 18, 2020 USD ($) | Dec. 18, 2020 CAD ($) | Dec. 07, 2020 USD ($) $ / shares shares | Dec. 04, 2020 USD ($) $ / shares shares | Dec. 01, 2020 $ / shares shares | Nov. 30, 2020 USD ($) | Oct. 31, 2020 $ / shares shares | Oct. 31, 2020 $ / shares shares | Oct. 31, 2019 $ / shares shares | Oct. 31, 2018 shares | Dec. 31, 2020 CAD ($) | Oct. 06, 2020 $ / shares | Apr. 30, 2020 $ / shares | Jan. 08, 2020 $ / shares | May 08, 2019 shares | May 07, 2019 shares | Oct. 31, 2017 shares
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share Price | $ / shares |  |  |  |  |  |  | $ 2.00 | $ 2.00 | $ 0.24 |  |  | $ 1.92 | $ 2.02 | $ 2.29 |  |  |
Common stock, shares outstanding |  |  |  |  |  |  | 294,706,758 | 294,706,758 | 193,608,684 |  |  |  |  |  | 15,284,269 | 183,411,230 |
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares |  |  |  |  |  |  | $ 0.242 | $ 0.242 |  |  |  | $ 0.242 |  |  |  |  |
Common Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sale of common stock, net of fees (in shares) |  |  |  |  |  |  |  | 86,307,932 | 119,128,677 | 476,265 |  |  |  |  |  |  |
Common stock, shares outstanding |  |  |  |  |  |  | 294,706,758 | 294,706,758 | 193,608,684 | 7,972,686 |  |  |  |  |  |  | 5,791,068
Underwriting Agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sale of common stock, net of fees (in shares) |  |  |  |  |  |  | 50,000,000.0 |  |  |  |  |  |  |  |  |  |
Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock, shares outstanding |  |  |  | 319,706,758 |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Member] | Payoff Letter [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term line of credit after discount | $ |  |  | $ 87,300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument prepayment premium | $ |  |  | 4,000,000 |  |  | $ 14,900,000 |  |  |  |  |  |  |  |  |  |  |
Repayments of lines of credit | $ |  |  | $ 11,200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Member] | Orion credit agreement [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of warrants or rights issued |  |  | 2,700,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares |  |  | $ 0.242 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock exercises price | $ |  |  | $ 653,400 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Member] | Enbridge Inc. [Member] | Payoff Letter [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Carrying value of preferred shares, total | $ |  |  |  |  |  |  |  |  |  |  | $ 27.4 |  |  |  |  |  |
Preferred stock, redemption amount | $ |  |  |  |  |  |  |  |  |  |  | 4.3 |  |  |  |  |  |
Dividends payable | $ |  |  |  |  |  |  |  |  |  |  | $ 23.1 |  |  |  |  |  |
Final payment To payoff | $ 21,500,000 | $ 27.4 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Member] | Maximum [Member] | Payoff Letter [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt prepayment premium amount to be waived | $ |  |  | $ 4,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Member] | Minimum [Member] | Common Stock [Member] | Orion credit agreement [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of warrants or rights issued |  |  |  | 2,700,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Member] | Underwriting Agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock issued to underwriters |  |  |  |  | 19,822,219 |  |  |  |  |  |  |  |  |  |  |  |
Aggregate number of shares issued |  |  |  |  | 14,696,320 |  |  |  |  |  |  |  |  |  |  |  |
Share Price | $ / shares |  |  |  |  | $ 6.50 |  |  |  |  |  |  |  |  |  |  |  |
Sale of common stock, net of fees (in shares) |  |  |  | 25,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Stock issued during period on sales agreement | $ |  |  |  | $ 162,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Underwriting discounts and commissions | $ / shares |  |  |  | $ 0.2275 |  |  |  |  |  |  |  |  |  |  |  |  |
Net proceeds on sales agreement | $ |  |  |  | $ 156,300,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Member] | Underwriting Agreement | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Option to purchase additional common stock shares |  |  |  |  | 5,177,781 |  |  |  |  |  |  |  |  |  |  |  |

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