Note 11 - Financial Instruments (Detail)				9 Months Ended
	Sep. 30, 2012 USD ($)	Sep. 30, 2012 AUD	Dec. 31, 2011 USD ($)	Sep. 30, 2012 Interest Expense [Member] USD ($)	Sep. 30, 2011 Interest Expense [Member] USD ($)
Derivative, Fixed Interest Rate	4.36%	4.36%
Derivative, Notional Amount	$ 5,200,000		$ 6,600,000
Unrealized Gain (Loss) on Derivatives				169,000	253,000
Long-term Debt (in Dollars)	$ 381,896,000	50,000,000