Net Income (Loss) Per Share - Schedule of Antidilutive Securities Excluded from Calculations of Net Loss Per Share (Details) - shares |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2019 |
Jun. 30, 2018 |
Jun. 30, 2019 |
Jun. 30, 2018 |
|
| Anti-dilutive securities | 1,231,000 | 669,000 | 1,211,000 | 669,000 |
| Options to Purchase Common Stock [Member] | ||||
| Anti-dilutive securities | 988,000 | 426,000 | 988,000 | 426,000 |
| Warrants to Purchase Common Stock [Member] | ||||
| Anti-dilutive securities | 243,000 | 243,000 | 223,000 | 243,000 |