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Stockholders' Equity (Narrative) (Details) |  |  |  | 1 Months Ended | 3 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 06, 2022 USD ($) | Dec. 15, 2021 USD ($) | Sep. 01, 2020 shares | Dec. 31, 2021 USD ($) $ / shares shares | Nov. 30, 2021 USD ($) shares | Dec. 31, 2020 USD ($) $ / shares shares | Dec. 31, 2022 USD ($) $ / shares shares | Dec. 31, 2021 USD ($) $ / shares shares | Dec. 31, 2020 USD ($) $ / shares shares | Sep. 30, 2021 $ / shares | Sep. 30, 2020 $ / shares | Dec. 31, 2019 shares | Dec. 31, 2017 USD ($) shares
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred Stock, Shares Authorized |  |  |  |  |  |  | 20,000,000 |  |  |  |  |  |
Preferred Stock, Shares Issued |  |  |  |  |  |  |  |  |  |  |  |  | 104,574
Common Stock, Shares, Issued |  |  |  |  |  |  | 14,638,846 |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized |  |  |  |  |  |  |  | 700,000 |  |  |  |  |
Conversion of Stock, Shares Converted |  |  |  |  |  |  | 0 |  |  |  |  |  |
Preferred Stock Retired, Liquidation Preference | $ |  |  |  |  |  |  |  | $ 5,000,198 |  |  |  |  |
Conversion of Stock, Share Price | $ / shares |  |  |  | 21.62 |  |  |  | 21.62 |  |  |  |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares |  |  |  | $ 21.62 |  |  |  | $ 21.62 |  |  |  |  |
Payments for Repurchase of Preferred Stock and Preference Stock | $ |  | $ 1,100,000 |  | $ 43,300,000 | $ 42,200,000 | $ 60,000,000 | $ 0 | $ 44,400,000 | $ 61,600,000 |  |  |  |
Operating Loss Carryforwards | $ |  |  |  |  |  |  |  |  |  |  |  |  | $ 649,100,000
Common Stock Ownership Enabling Preferred Stock Purchase Rights |  |  |  |  |  |  | 4.99% |  |  |  |  |  |
Common Stock Ownership Enabling Preferred Stock Purchase Rights, Incremental |  |  |  |  |  |  | 0.50% |  |  |  |  |  |
Stock issued during period | $ |  |  |  |  |  |  | $ 4,000,000.0 | $ 42,100,000 | $ 23,100,000 |  |  |  |
Stock Repurchase Price per Share | $ / shares |  |  |  | $ 1,149.99 |  |  |  |  |  |  |  |  |
Preferred Stock, Liquidation Amount per Share | $ / shares |  |  |  |  |  | $ 1,291.04 |  |  | $ 1,291.04 | $ 1,347.29 |  |  |
Common Class A [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Common Stock, Shares Authorized |  |  |  |  |  |  | 70,000,000 |  |  |  |  |  |
Common Stock, Par or Stated Value Per Share | $ / shares |  |  |  |  |  |  | $ 0.10 |  |  |  |  |  |
Common Stock, Shares, Issued |  |  |  | 13,649,933 |  |  | 13,919,646 | 13,649,933 |  |  |  |  |
Stock Issued During Period, Shares, New Issues |  |  | 2,537,500 |  |  |  | 99,090 | 1,516,467 |  |  |  |  |
Stock Issued During Period, Value, Gross | $ | $ 24,000,000 |  |  |  |  |  | $ 3,800,000 | $ 44,200,000 |  |  |  |  |
Stock Issued During Period, Value, Net | $ |  |  |  |  |  |  | 3,600,000 | $ 42,400,000 |  |  |  |  |
Direct Costs of Stock Issuance | $ |  |  |  |  |  |  | $ (300,000) |  |  |  |  |  |
Conversion of Stock, Shares Converted |  |  |  |  | 231,276 |  |  | 231,276 | 398,262 |  |  |  |
Sale of Stock, Price Per Share | $ / shares |  |  |  |  |  | $ 10.00 |  |  | $ 10.00 |  |  |  |
Gross Proceeds from Issuance of Common Stock | $ |  |  |  |  |  |  |  |  | $ 25,400,000 |  |  |  |
Payments of Stock Issuance Costs | $ |  |  |  |  |  |  |  |  | $ 2,300,000 |  |  |  |
Common Class B [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Common Stock, Shares Authorized |  |  |  |  |  |  | 30,000,000 |  |  |  |  |  |
Common Stock, Par or Stated Value Per Share | $ / shares |  |  |  |  |  |  | $ 0.10 |  |  |  |  |  |
Common Stock, Shares, Issued |  |  |  |  |  |  | 719,200 |  |  |  |  |  |
Conversion of Stock, Shares Converted |  |  |  |  |  |  |  |  | (398,262) |  |  |  |
Preferred Series B [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred Stock, Liquidation Preference Per Share | $ / shares |  |  |  |  |  |  |  |  |  |  | $ 1,000 |  |
Direct Costs of Stock Issuance | $ |  |  |  |  |  |  |  | $ 900,000 |  |  |  |  |
Conversion of Stock, Shares Converted |  |  |  |  |  |  |  | 3,873 |  |  |  |  |
Stock Repurchased and Retired During Period, Shares |  |  |  |  |  |  |  | 37,847 | 62,854 |  |  |  |
Preferred Stock, Shares Outstanding |  |  |  | 0 |  | 41,720 | 0 | 0 | 41,720 |  |  | 104,574 |
Warrant [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion of Stock, Shares Converted |  |  |  |  |  |  |  | 250,000 |  |  |  |  |

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