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Share Capital (Details Textual) |  |  | 3 Months Ended | 6 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Mar. 14, 2019 USD ($) $ / shares shares | Mar. 07, 2017 USD ($) $ / shares | Jun. 30, 2021 USD ($) vote $ / shares shares | Jun. 30, 2021 USD ($) vote $ / shares shares | Mar. 31, 2021 USD ($) shares | Dec. 31, 2020 USD ($) shares | Jun. 30, 2020 USD ($) shares | Mar. 31, 2020 USD ($) shares | Dec. 31, 2019 USD ($) shares
Share Capital [Line Items] |  |  |  |  |  |  |  |  |
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest |  |  | $ (407,692,000) | $ (407,692,000) | $ (405,583,000) | $ (408,910,000) | $ (184,606,000) | $ (183,944,000) | $ (190,575,000)
Preferred Stock |  |  |  |  |  |  |  |  |
Share Capital [Line Items] |  |  |  |  |  |  |  |  |
Proceeds from Issuance of Convertible Preferred Stock | $ 98,620,000 |  |  |  |  |  |  |  |
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest |  | $ 90,123,000 | 152,746,000 | $ 152,746,000 | $ 152,746,000 | $ 152,746,000 | $ 152,746,000 | $ 152,746,000 | $ 152,746,000
Preferred Stock | Series 4 Convertible Preferred Stock |  |  |  |  |  |  |  |  |
Share Capital [Line Items] |  |  |  |  |  |  |  |  |
Proceeds from Issuance of Convertible Preferred Stock |  | $ 95,000 |  |  |  |  |  |  |
Preferred Stock, Conversion Price Per Preference Share | $ / shares | $ 7.42 | $ 10.00 |  |  |  |  |  |  |
Preferred Stock, Accretion Percentage, Preference | 8.00% |  |  |  |  |  |  |  |
Preferred Stock, Accretion Rate, Preference Per Share | $ / shares |  |  |  | $ 9.20 |  |  |  |  |
Preferred Stock, Accretion of Redemption Discount |  |  |  | $ 5,193,000 |  |  |  |  |
Preferred Stock, Liquidation Preference, Value |  |  | $ 133,732,000 | $ 133,732,000 |  |  |  |  |
Preferred Stock, Convertible Preference Shares, Convertible at Company's Option, Term | 2 years | 5 years |  |  |  |  |  |  |
Shares outstanding (shares) | shares |  |  | 145,000,000 | 145,000,000 | 145,000,000 | 145,000,000 | 145,000,000 | 145,000,000 | 145,000,000
Preferred Stock, Conversion Basis, Common Stock Class A Closing Trade Price | 125.00% |  |  |  |  |  |  |  |
Preferred Stock | Series 6 Convertible Preferred Stock |  |  |  |  |  |  |  |  |
Share Capital [Line Items] |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, Issued for Services | shares | 50,000 |  |  |  |  |  |  |  |
Proceeds from Issuance of Convertible Preferred Stock | $ 50,000,000 |  |  |  |  |  |  |  |
Preferred Stock, Liquidation Preference Per Share | $ / shares | $ 1,000 | $ 1,000 |  |  |  |  |  |  |
Preferred Stock, Conversion Price Per Preference Share | $ / shares | $ 5.00 |  |  |  |  |  |  |  |
Preferred Stock, Accretion Percentage, Preference | 8.00% |  |  |  |  |  |  |  |
Preferred Stock, Monthly Accretion of Redemption Discount |  |  | $ 7.84 |  |  |  |  |  |
Preferred Stock, Accretion of Redemption Discount |  |  |  | $ 2,329,000 |  |  |  |  |
Preferred Stock, Liquidation Preference, Value |  |  | 59,980,000 | 59,980,000 |  |  |  |  |
Preferred Stock, Convertible Preference Shares, Convertible at Company's Option, Term | 2 years | 5 years |  |  |  |  |  |  |
Preferred Stock, Conversion Basis, Common Stock Class A Closing Trade Price | 125.00% |  |  |  |  |  |  |  |
Common Stock and Other Paid-in Capital |  |  |  |  |  |  |  |  |
Share Capital [Line Items] |  |  |  |  |  |  |  |  |
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest |  |  | $ 97,783,000 | $ 97,783,000 | $ 106,193,000 | $ 104,367,000 | $ 98,234,000 | $ 99,587,000 | $ 101,469,000
Common Shares | Common Class A |  |  |  |  |  |  |  |  |
Share Capital [Line Items] |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, Issued for Services | shares | 14,285,714 |  |  |  |  |  |  |  |
Proceeds from Issuance of Common Stock | $ 50,000,000 |  |  |  |  |  |  |  |
Shares outstanding (shares) | shares |  |  | 77,254,378 | 77,254,378 |  | 73,529,105 |  |  |
Common stock, voting rights, number of votes per share | vote |  |  | 1 | 1 |  |  |  |  |
Common Stock, Par or Stated Value Per Share | $ / shares |  |  | $ 0 | $ 0 |  |  |  |  |
Common Shares | Common Class B |  |  |  |  |  |  |  |  |
Share Capital [Line Items] |  |  |  |  |  |  |  |  |
Shares outstanding (shares) | shares |  |  | 3,743 | 3,743 |  | 3,743 |  |  |
Common stock, voting rights, number of votes per share | vote |  |  | 20 | 20 |  |  |  |  |
Preferred Stock, Par or Stated Value Per Share | $ / shares |  |  | $ 0 | $ 0 |  |  |  |  |

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