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Stockholders’ Equity - Summary of Preferred Stock Issued and Outstanding (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Class of Stock [Line Items] |  |
Shares Authorized (in shares) | 30,900,000 | 15,890,000
Preferred stock, shares issued (in shares) | 20,872,888 | 12,000,000
Preferred stock, shares outstanding (in shares) | 20,872,888 | 12,000,000
Carrying Value | $ 504,765 | $ 289,755
Preferred Stock, liquidation preference, value | $ 521,822 | $ 300,000
Liquidation preference (USD per share) | $ 25 |
Series B Preferred Stock |  |
Class of Stock [Line Items] |  |
Shares Authorized (in shares) | 6,000,000 | 6,000,000
Preferred stock, shares issued (in shares) | 3,156,087 | 3,000,000
Preferred stock, shares outstanding (in shares) | 3,156,087 | 3,000,000
Carrying Value | $ 76,180 | $ 72,397
Preferred Stock, liquidation preference, value | $ 78,902 | $ 75,000
Contractual Rate | 7.75% | 7.75%
Series C Preferred Stock |  |
Class of Stock [Line Items] |  |
Shares Authorized (in shares) | 6,600,000 | 4,140,000
Preferred stock, shares issued (in shares) | 4,181,807 | 3,600,000
Preferred stock, shares outstanding (in shares) | 4,181,807 | 3,600,000
Carrying Value | $ 101,102 | $ 86,862
Preferred Stock, liquidation preference, value | $ 104,545 | $ 90,000
Contractual Rate | 7.875% | 7.875%
Series D Preferred Stock |  |
Class of Stock [Line Items] |  |
Shares Authorized (in shares) | 8,400,000 | 5,750,000
Preferred stock, shares issued (in shares) | 6,123,495 | 5,400,000
Preferred stock, shares outstanding (in shares) | 6,123,495 | 5,400,000
Carrying Value | $ 148,134 | $ 130,496
Preferred Stock, liquidation preference, value | $ 153,087 | $ 135,000
Contractual Rate | 8.00% | 8.00%
Liquidation preference (USD per share) | $ 25 |
Series E Preferred Stock |  |
Class of Stock [Line Items] |  |
Shares Authorized (in shares) | 9,900,000 |
Preferred stock, shares issued (in shares) | 7,411,499 |
Preferred stock, shares outstanding (in shares) | 7,411,499 |
Carrying Value | $ 179,349 |
Preferred Stock, liquidation preference, value | $ 185,288 |
Contractual Rate | 7.875% |

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