Equity - Preferred Stock (Details) - $ / shares |
Mar. 31, 2019 |
Dec. 31, 2018 |
---|---|---|
Class of Stock [Line Items] | ||
Par value (in dollars per share) | $ 0.001 | $ 0.001 |
Shares authorized (in shares) | 20,000,000 | 20,000,000 |
Series A shares issued and outstanding | ||
Class of Stock [Line Items] | ||
Shares issued (in shares) | 6,375 | 6,375 |
Shares outstanding (in shares) | 6,375 | 6,375 |
Series A-2 shares issued and outstanding | ||
Class of Stock [Line Items] | ||
Shares issued (in shares) | 4,000 | 14,000 |
Shares outstanding (in shares) | 4,000 | 14,000 |