Equity Incentive Plans (Narrative) (Details) $ / shares in Units, $ in Millions |
6 Months Ended |
---|---|
Jun. 30, 2023
USD ($)
$ / shares
shares
| |
Stock Option [Member] | |
Common stock closing price | $ / shares | $ 1.14 |
Unrecognized compensation cost related to unvested options | $ | $ 1.7 |
Restricted Stock Awards [Member] | |
Additional awards | shares | 0 |
Restricted Stock Awards [Member] | Minimum [Member] | |
Vesting period of share-based compensation award | 2 years |
Restricted Stock Awards [Member] | Maximum [Member] | |
Vesting period of share-based compensation award | 4 years |
Stock Options And Restricted Stock Awards [Member] | |
Weighted-average remaining period for recognition of compensation costs related to unvested options | 1 year 9 months 10 days |
Equity Incentive Plan 2016 [Member] | |
Vesting period of share-based compensation award | 4 years |
Equity Incentive Plan 2016 [Member] | Maximum [Member] | |
Expiration period of share-based payment award | 10 years |