BILLINGS, Mont. (AP) — More signs of problems have emerged with an Australian company’s bid to take over a Montana coal mine, as court documents reveal Ambre Energy has been unable to come up with more than $70 million in cash to close on the deal.

The Decker mine near the Wyoming border is co-owned by Ambre and Wyoming-based Cloud Peak Energy. Ambre wants full ownership as part of its ambitious plans to ramp up coal exports to Asia through two West Coast ports.