Note 11 - Financial Instruments (Details)	6 Months Ended						12 Months Ended
	Jun. 30, 2013 USD ($)	Jun. 30, 2013 AUD	Jun. 30, 2013 GBP (£)	Dec. 31, 2012 USD ($)	Dec. 31, 2012 AUD	Dec. 31, 2011 USD ($)	Dec. 31, 2013 Interest Expense [Member] USD ($)	Dec. 31, 2012 Interest Expense [Member] USD ($)	Dec. 31, 2011 Interest Expense [Member] USD ($)	Jun. 30, 2013 Other Current Liabilities [Member] USD ($)	Jun. 30, 2013 Other Current Assets [Member] USD ($)
Note 11 - Financial Instruments (Details) [Line Items]
Derivative, Fixed Interest Rate				4.36%	4.36%
Derivative, Notional Amount				$ 4,800,000		$ 6,600,000
Unrealized Gain (Loss) on Derivatives							101,000	225,000	328,000
Long-term Debt, Fair Value (in Dollars)					50,000,000
Derivative, Amount of Hedged Item (in Dollars)		60,000,000	40,000,000
Derivative, Amount of Hedged Item (in Pounds)		60,000,000	40,000,000
Payments for (Proceeds from) Hedge, Investing Activities	1,400,000
Derivative Liability	622,000									683,000
Derivative Asset											$ 61,000