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Stockholders' Equity (Tables) (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Class of Stock [Line Items] |  |  |
Stock issued during period | $ 0.8 | $ 4.6 |
Common Stock, Shares, Issued | 9,437,389 |  |
Preferred Stock, Shares Issued | 104,574 |  |
Preferred Stock, Shares Outstanding | 104,574 | 104,574 |
Preferred Series B [Member] |  |  |
Class of Stock [Line Items] |  |  |
Stock Issued During Period, Shares, New Issues |  | 104,574 |
Preferred Stock, Shares Issued | 104,574 | 104,574 |
Common Class A [Member] |  |  |
Class of Stock [Line Items] |  |  |
Common Stock, Shares, Outstanding | 8,031,307 | 7,632,669 | 7,563,600
Conversion of Stock, Shares Converted |  | 30,318 |
Stock Issued During Period, Shares, New Issues | 398,638 | 38,751 |
Stock issued during period | $ 0.8 |  |
Common Stock, Shares, Issued | 8,031,307 | 7,632,669 |
Common Class B [Member] |  |  |
Class of Stock [Line Items] |  |  |
Common Stock, Shares, Outstanding | 1,406,082 | 1,406,082 | 1,436,400
Conversion of Stock, Shares Converted |  | (30,318) |
Common Stock, Shares, Issued | 1,406,082 | 1,406,082 |

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