Up to you on what to do. If you feel like you can break out your "War-Fingers" and squish every one you see you may be able to extend the grow but it looks like they may have already damaged too much. How does the rest of the plant compare?
I had a similar problem with spider mites a while ago. Broke out the "War-Fingers", because spraying with chemicals isn't an option at this stage, and just kept on top of it everyday. Spending an hour each day wiping out the population. Never got rid of them completely but was able to keep then from ruining my flower. However, this was on a single plant grow. If it had been a closet full, I would have chopped it all down and called it a loss. Almost impossible to keep up on an infestation once it is in full swing, especially this stage into flower.
I looked closer at your bug and definitely is a Thrips problem. Get your hands on some food grade Diatomaceous Earth and spread that all over the soil medium. This will help kill any new hatchling. Be careful as it is easily airborne and is unhealthy to inhale the dust.