Schedule of Antidilutive Securities Excluded from Calculations of Net Loss Per Share (Details) - shares shares in Thousands |
6 Months Ended | |
|---|---|---|
Jun. 30, 2021 |
Jun. 30, 2020 |
|
| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||
| Anti-dilutive securities | 1,682 | 2,044 |
| Outstanding Options to Purchase Common Stock [Member] | ||
| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||
| Anti-dilutive securities | 1,439 | 1,801 |
| Warrants to Purchase Common Stock [Member] | ||
| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||
| Anti-dilutive securities | 243 | 243 |