Net Loss Per Share (Details) - shares shares in Thousands |
3 Months Ended | |
|---|---|---|
Mar. 31, 2019 |
Mar. 31, 2018 |
|
| Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | 2,060 | 840 |
| Convertible Debt Securities [Member] | ||
| Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | 469 | 0 |
| Employee Stock Option [Member] | ||
| Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | 476 | 499 |
| Warrant [Member] | ||
| Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | 1,115 | 341 |