RE: Share buy-back I believe there is a protocol that must be followed, BOD approval, a formal announcement of intent etc. An announcement would make sense since they would be buying back based on the belief that their shares are under valued, show they are supporting and believe in their business. If the shares are retired you would see the total outstanding reduced and earnings per share increased. The loan was require to remove the going concern status so I don't see how they could buy shares and retire with that money, maybe they can buy and hold???
If they were in the position to buy shares it would be a great message.
Regards,
Frog