Something is only worth what another is willing to pay for it.
This is a VERY common mistake that some investors make with bankruptcies. They think that because so much money has been spent on the assets, they are worth a lot of money. But they are not. If they were, the company would not be bankrupt, would it?
In this case, everything is worth just $4,340,000, which is what the buyer is paying for the assets through the liquidation process.
A harsh reality, but not every business is successful. And BioAmber wasn't.