$GBSN trading pre-market at $ 5.19. That's -8.5% from yesterday's close ($ 0.162 * 35 pre R/S). I would only buy below $ 4.50 to play the bounce and exit tomorrow.
Other FDA approvals, that's a different and longer-term story.
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IMHO
Always, always do you own DD. Only invest funds you can afford to lose and trust nobody but yourself.