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Preferred Stock (Details Narrative) - USD ($) $ / shares in Units, $ in Thousands |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Feb. 12, 2016 | Mar. 31, 2019 | Mar. 31, 2018 | Dec. 31, 2018
Preferred shares authorized |  | 100,000 |  | 100,000
Preferred shares, par value |  | $ 0.01 |  | $ 0.01
Number of stock shares issued |  |  | 640,163 |
Liquidation preference |  | $ 2,943 |  | $ 2,856
Acquisition percentage description |  | Concurrent with entry into the Acquisition Agreement and the Series A Purchase Agreement, the Company and MEM entered into an Investor Rights Agreement, which provides MEM rights to certain information and Board observer rights. MEM has agreed that it, along with its affiliates, will not acquire more than 16.86% of the Company's issued and outstanding shares of common stock. |  |
Series P Preferred Stock [Member] |  |  |  |
Preferred shares authorized |  | 50,000 |  |
Preferred shares outstanding |  |  |  |
Series A Convertible Preferred Stock [Member] |  |  |  |
Liquidation preference per share | $ 40 |  |  |
Liquidation preference | $ 2,000 |  |  |
Preferred stock, dividend rate | 12.25% |  |  |
Number of shares converted | 13.33 |  |  |
Preferred stock issued upon conversion | 666,667 |  |  |
Number of common stock issued upon conversion |  | 793,349 |  | 793,349
Series A Convertible Preferred Stock [Member] | Mt. Emmons Mining Company [Member] |  |  |  |
Number of stock shares issued | 50,000 |  |  |

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