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Subsequent Events - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions |  |  | 6 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Aug. 01, 2022 | Jun. 14, 2022 | Jun. 30, 2022 | Dec. 31, 2021
Cantor Fitzgerald & Co. [Member] |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Number of share sold under the sales agreement |  |  | 2,092,167 |
Proceeds from issuance of common stock, net of issuance costs |  |  | $ 5.9 |
6% convertible exchangeable preferred stock |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Dividend declared, date |  | Jun. 14, 2022 |  |
Preferred stock dividend declared, amount per share |  | $ 0.15 |  |
Preferred stock, dividend rate (in percent) |  |  | 6.00% | 6.00%
6% convertible exchangeable preferred stock | Subsequent event |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Dividends payable, date to be paid | Aug. 01, 2022 |  |  |
Dividend, record date | Jul. 15, 2022 |  |  |
Preferred stock, dividends per share, cash paid | $ 0.15 |  |  |

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