Management (and others) not buying says another thing: it's not worth buying. A good trading stock has a lot of volume and movement: Sint has neither.
As for management being complicit, who's management (other than Bal)?
You continually harp on the IP's value.....and yet no one sees it....for years! This is why management (and everyone else) doesn't buy. As for actual IP value, it doesn't matter IF the product is too difficult to sell, produce, get needed approval etc etc. Until it becomes the 'in' thing, you're watching your cash dwindle more and more, because Sonny will continue collecting regardless, and the company will stay alive without producing, but the retail investor?
How long was it before the electric car became 'the thing'? How long did Ford and others keep it under wraps (knowing it was a viable alternative to their own)? So even assuming it's the same deal with Sint, right now everyone BUT retail, knows it's not ready for prime time, regardless the reasoning as to why.
The only winners here are those getting paid for negligible results and those who have not invested. You'll always have an occasional short or trader....doesn't matter the company.