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Stockholders' Equity (Warrants) (Details) - USD ($) $ / shares in Units, $ in Thousands |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 15, 2020 | Dec. 31, 2020 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Class of Stock [Line Items] |  |  |  |  |
Number of securities called by warrants (in shares) | 37,039,106 |  |  |  |
Proceeds from the issuance of warrants | $ 495,000 |  | $ 14,041 | $ 0 | $ 0
Payments for Repurchase of Warrants |  | $ 33,700 | $ 33,650 | $ 0 | $ 0
Warrants Repurchased Rate |  | 48.00% |  |  |
Shares issued (in shares) |  | 12,300,000 |  |  |
Proceeds from warrant exercises |  | $ 6,500 |  |  |
Warrant |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |
Proceeds from the issuance of warrants | 14,000 |  |  |  |
Debt |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |
Proceeds from the issuance of warrants | $ 481,000 |  |  |  |
Exercise Price Range One |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |
Exercise price of warrants (usd per share) | $ 1.66 |  |  |  |
Exercise Price Range Two |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |
Exercise price of warrants (usd per share) | $ 2.08 |  |  |  |

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- Definition Exercise price per share or per unit of warrants or rights outstanding. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21475-112644 + Details
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- Definition Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21475-112644 + Details
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