Take a moment to think about what has changed in the last 3 years:
Yes, the stock price has gone down.
But the company achieved EPA approval, they came to an agreement with EMA Partners, they have some distribution agreements, they hired an Interum CEO, then hired a full time CEO. They added Dodd to help with some business strategy. And they are applying for FDA approval.
Everything is now looking the brightest for the company.
So ask yourself, why would they hire more people of there was little hope for the company?
Also, why would those CEO's purchase stock, unless they saw the potential?