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Note 3 - Equity Investment (Details Textual)
AUD in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Dec. 31, 2015
AUD
Mission Providence [Member]        
Equity Method Investment, Ownership Percentage       60.00%
Joint Venture, Rights to Cash or Profit Distributions, Percentage       75.00%
Payments to Acquire Equity Method Investments $ 16,072      
Equity Method Investments, Commitment to Fund Joint Venture | AUD       AUD 6,397
Payments to Acquire Equity Method Investments $ 16,072