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Preferred Stock (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands |  |  |  | 1 Months Ended | 3 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Mar. 30, 2020 | Oct. 31, 2019 | Oct. 06, 2017 | Apr. 30, 2014 | Dec. 31, 2017 | Dec. 31, 2014 | Dec. 31, 2020 | May 28, 2020 | Dec. 31, 2019 | Oct. 25, 2019
Schedule of Capitalization, Equity [Line Items] |  |  |  |  |  |  |  |  |  |
Common stock, par value |  |  |  |  |  |  | $ 0.01 |  | $ 0.01 |
Shares authorized |  |  |  |  |  |  | 9,090,909 |  | 9,090,909 |
Series B Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |
Schedule of Capitalization, Equity [Line Items] |  |  |  |  |  |  |  |  |  |
Issuance of preferred stock |  |  |  |  |  |  | 0 |  | 0 |
Aggregate value |  |  |  |  |  |  |  |  |  |
Number of shares converted |  |  | 480,000 |  |  |  |  |  |  |
Stock conversion, estimated preferred stock dividends eliminated quarterly |  |  |  |  | $ 188 |  |  |  |  |
Stock conversion, estimated preferred stock dividends eliminated annually |  |  |  |  | $ 750 |  |  |  |  |
Preferred stock, par value |  |  |  |  |  |  | $ 0.01 |  | $ 0.01 |
Series B Preferred Stock [Member] | Private Placement [Member] |  |  |  |  |  |  |  |  |  |
Schedule of Capitalization, Equity [Line Items] |  |  |  |  |  |  |  |  |  |
Issuance of preferred stock |  |  |  | 480,000 |  |  |  |  |  |
Debt Conversion, Original Debt, Interest Rate of Debt |  |  |  | 6.25% |  |  |  |  |  |
Price per share |  |  |  | $ 25.00 |  |  |  |  |  |
Aggregate value |  |  |  |  |  | $ 12,000 |  |  |  |
Placement fees |  |  |  |  |  | 482 |  |  |  |
Other offering expenses |  |  |  |  |  | 149 |  |  |  |
Net proceeds from issuance of Series B preferred stock |  |  |  |  |  | $ 11,369 |  |  |  |
Series C Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |
Schedule of Capitalization, Equity [Line Items] |  |  |  |  |  |  |  |  |  |
Issuance of preferred stock |  |  |  |  |  |  | 0 |  | 12,337 |
Aggregate value |  |  |  |  |  |  |  |  |  |
Preferred stock, par value |  |  |  |  |  |  | $ 0.01 |  | $ 0.01 |
Number of outstanding shares | 12,607 |  |  |  |  |  |  |  |  |
Series C Preferred Stock [Member] | Private Placement [Member] |  |  |  |  |  |  |  |  |  |
Schedule of Capitalization, Equity [Line Items] |  |  |  |  |  |  |  |  |  |
Issuance of preferred stock |  | 12,337 |  |  |  |  |  |  |  |
Aggregate value |  |  |  |  |  |  |  |  |  | $ 25,000
Purchase price per share |  | $ 1,200.00 |  |  |  |  |  |  |  |
Shares upon conversion | 270 |  |  |  |  |  |  |  |  |
Preferred stock, par value |  | $ 0.01 |  |  |  |  |  |  |  |
Common Stock [Member] |  |  |  |  |  |  |  |  |  |
Schedule of Capitalization, Equity [Line Items] |  |  |  |  |  |  |  |  |  |
Number of shares converted | 100 |  |  |  |  |  |  |  |  |
Shares issued upon conversion |  |  | 6,857,143 |  |  |  |  |  |  |
Shares post-reverse-split |  |  | 1,246,753 |  |  |  |  |  |  |
Number of shares exchange | 27,000 |  |  |  |  |  |  |  |  |
Common Stock [Member] | Private Placement [Member] |  |  |  |  |  |  |  |  |  |
Schedule of Capitalization, Equity [Line Items] |  |  |  |  |  |  |  |  |  |
Shares sold |  | 849,615 |  |  |  |  |  |  |  |
Purchase price per share |  | $ 12.00 |  |  |  |  |  |  |  |
Non-Voting Common Stock [Member] |  |  |  |  |  |  |  |  |  |
Schedule of Capitalization, Equity [Line Items] |  |  |  |  |  |  |  |  |  |
Shares upon conversion |  |  |  |  |  |  |  | 100 |  |
Common stock, par value |  |  |  |  |  |  | $ 0.01 |  | $ 0.01 |
Shares authorized |  |  |  |  |  |  | 1,260,700 | 1,260,700 | 1,260,700 |
Non-Voting Common Stock [Member] | Private Placement [Member] |  |  |  |  |  |  |  |  |  |
Schedule of Capitalization, Equity [Line Items] |  |  |  |  |  |  |  |  |  |
Shares upon conversion |  | 100 |  |  |  |  |  |  |  |
Common stock, par value |  | $ 0.01 |  |  |  |  |  |  |  |

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