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Note 6 - Loan Payable (Details) (USD $)
 12 Months Ended 12 Months Ended 6 Months Ended
Dec. 31, 2012
2012 Demand Loan Facilities [Member]
Dec. 31, 2012
2012 Demand Loan Facilities [Member]
Maximum [Member]
Dec. 31, 2012
DLR Loan [Member]
Base Rate [Member]
Jan. 31, 2013
DLR Loan [Member]
Dec. 31, 2012
2012 DLRR Loan [Member]
Base Rate [Member]
Dec. 31, 2012
2012 DLRR Loan [Member]
London Interbank Offered Rate (LIBOR) [Member]
Dec. 31, 2012
2012 DLRR Loan [Member]
Jun. 30, 2014
2012 DLRR Loan [Member]
Jun. 30, 2014
Amended Credit Facility [Member]
Jun. 30, 2014
Foreign Exchange Risk [Member]
Jun. 30, 2014
Operating Demand Loan [Member]
Note 6 - Loan Payable (Details) [Line Items]                      
Line of Credit Facility, Maximum Borrowing Capacity $ 14,000,000 $ 14,000,000               $ 3,500,000 $ 1,000,000
Debt Instrument, Basis Spread on Variable Rate     1.25%   1.25% 2.50%         1.25%
Line of Credit Facility Share Repurchase Limit   2,000,000                  
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage 0.20%                    
Debt Instrument, Term             4 years        
Long-term Line of Credit       5,200,000       5,400,000     0
Line of Credit Facility, Interest Rate at Period End               5.00%      
Line of Credit Facility, Covenant Period                   18 months  
Derivative Asset, Fair Value, Gross Asset                   13,500,000  
Debt Instrument, Fee Amount                     500
Maximum Total Funded Debt To EBITDA Ratio                 2.00    
Minimum Fixed Charge Coverage                 1.20    
Line of Credit Facility Maximum Annual Capital Expenditure Ceiling                 $ 3,600,000