I sold 75% of my shares in CVT at loss and am keeping a small...

I sold 75% of my shares in CVT at loss and am keeping a small pocket only cover my loss if it happens (no one knows when).
I kept the shares for the last 18 months only to see the loss. The stock may be good, but if it cannot make money there is no point in keeping it looking at the losses deepen day by day unless one has extra money that is not required for the next 5 years.
we can keep discussing about how good the stock is or bad. Finally what matters is "Is it worth keeping it?" instead of investing the same money elsewhere and get some growth and dividends.
One thing that bothers me is that TT or NP has never put their guidance and milestone quantitatively for the last 18 months. Milestones are always qualitative. No specific earning details.
I am not suggesting anything to keep or buy. It is the individual economics that play a big role to Hold or to Sell.