I have been trading fnsr for 15 yrs and fnsr has crashed 4 times; 2 years ago it was <$1 presplit. Bottom line is you buy more or hold. It may take 6 months to get back but IT WILL COME BACK (depends on OIL too).
Another way to make money, even on a stock that "tanked," is to sell covered calls on your shares. I took a pretty good hit today, but I also sold calls earlier this month for a $3.20 premium. Selling OTM calls on your shares helps generate a little cash each month as the stock recovers, and FNSR will recover.