Reserves concerning?

MML operations seems to be back on track and they are cost effectively extracting ounces from their Co-O mine which has decent grades.

But what are the chances they will be able to sustain the cost effectiveness of their of gold production past their current Co-O mine reserves?

Is their exploration yielding enough results to continue operations beyond on the next couple of years given that they now seem to be extracting ounces at a rate of 100,000/year?