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Series A Term Preferred Stock (Details) - USD ($) $ / shares in Units, $ in Thousands | 1 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Aug. 31, 2016 | Jun. 30, 2019 | Jun. 30, 2018 | Dec. 31, 2018
Subsidiary, Sale of Stock [Line Items] |  |  |  |
Common stock, shares issued (in shares) |  | 20,532,770 |  | 17,891,340
Proceeds from issuance of preferred and common equity |  | $ 61,394 | $ 25,113 |
Offering costs |  | $ 4,521 | $ 935 |
Series A Preferred Stock |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |
Dividend rate (as percent) | 6.375% |  |  |
Preferred stock, par value (in dollars per share) | $ 0.001 | $ 0.001 |  | $ 0.001
Average sales price price (in dollars per share) | $ 25 |  |  |
Proceeds from issuance of preferred and common equity | $ 27,600 |  |  |
Redemption price (in dollars per share) | $ 25 | $ 25.98 |  |
Offering costs | $ 1,200 |  |  |
Fair value of preferred stock |  | $ 29,900 |  |
Series A Preferred Stock | Preferred Stock |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |
Common stock, shares issued (in shares) | 1,150,000 |  |  |
Proceeds from issuance of preferred stock | $ 28,800 |  |  |

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- Definition The price per share at which the preferred stock of an entity that has priority over common stock in the distribution of dividends and in the event of liquidation of the entity is redeemed or may be called at. The redemption features of this preferred stock are solely within the control of the issuer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21488-112644 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -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 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21564-112644 + Details
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