text: At 31 December 2014, the Group had three customers that owed the Group more than $1.0 million each and 
  accounted for approximately 75% of total accrued revenue receivables. There was one customer with balances 
  greater than $5.0 million accounting for approximately 56% of total accrued revenue receivables. For joint 
  interest billing receivables, if payment is not made, the Group can withhold future payments of revenue, as 
  such, there is minimal to no credit risk associated with these receivables. 
  
  **d) Liquidity Risk**
  
  Liquidity risk is the risk that the Group will not be able to meet its financial obligations as they fall due. The 
  Group’s approach to managing liquidity is to ensure that it will have sufficient liquidity to meet its liabilities as 
  they become due, without incurring unacceptable losses or risking damage to the Group’s reputation. The Group 
  manages liquidity risk by maintaining adequate reserves and banking facilities by continuously monitoring 
  forecast and actual cash flows, and by matching the maturity profiles of financial assets and liabilities. 
  
  As at 31 December 2014, based on the current borrowing based, the Group had $15.0 million of undrawn 
  borrowing facilities. 