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Stockholders' Equity (Details 2) - USD ($) $ / shares in Units, $ in Millions |  |  | 12 Months Ended |
--- | --- | --- | --- | ---
Jan. 30, 2018 | Jan. 23, 2018 | Dec. 31, 2018 | Jan. 31, 2018
Preferred stock |  |  |  |
Preferred shares authorized (in shares) |  |  | 1,000,000 |
Preferred stock dividend rate (as percent) |  |  | 500.00% |
Series A Preferred Stock |  |  |  |
Preferred stock |  |  |  |
Par value (in dollars per share) |  |  | $ 1.0 |
Percent of outstanding common stock issued upon conversion (as percent) |  | 16.00% |  |
Market price at issuance (in dollars per share) |  | $ 9.91 |  |
Percent of ownership required for non-voting observer position on Board of Directors (as percent) |  | 5.00% |  |
Series A Preferred Stock | Securities Purchase Agreement |  |  |  |
Preferred stock |  |  |  |
Preferred stock dividend rate (as percent) |  | 5.00% |  |
Shares issued (in shares) |  | 9,926 |  |
Value of shares issued |  | $ 9.9 |  |
Wipro | Series A Preferred Stock | Securities Purchase Agreement |  |  |  |
Preferred stock |  |  |  |
Preferred shares authorized (in shares) |  |  |  | 9,926
Shares issued (in shares) | 9,926 |  |  |
Value of shares issued | $ 9.9 |  |  |

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