Earnings/ (Loss) Per Common Share (Details) - shares |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2019 |
Jun. 30, 2018 |
Jun. 30, 2019 |
Jun. 30, 2018 |
|
| Number of Common Shares | ||||
| Shares with anti-dilutive effect, not included in calculation of earnings per share | 861,158 | 701,482 | 834,394 | 663,397 |
| Convertible Preferred Stock | ||||
| Shares with anti-dilutive effect, not included in calculation of earnings per share | 349,900 | 349,900 | 349,900 | 349,900 |