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Note 7 - Credit Facility (Details) (USD $)
1 Months Ended 6 Months Ended
Jun. 30, 2014
Dec. 31, 2013
Aug. 07, 2014
Subsequent Event [Member]
Jun. 30, 2014
Line of Credit [Member]
London Interbank Offered Rate (LIBOR) [Member]
Minimum [Member]
Jun. 30, 2014
Line of Credit [Member]
London Interbank Offered Rate (LIBOR) [Member]
Maximum [Member]
Jun. 30, 2014
Minimum [Member]
Jun. 30, 2014
Maximum [Member]
Note 7 - Credit Facility (Details) [Line Items]              
Line of Credit Facility, Maximum Borrowing Capacity (in Dollars) $ 5,000,000            
Debt Instrument, Basis Spread on Variable Rate       1.00% 1.50%    
Long-term Line of Credit (in Dollars) 3,500,000 3,500,000 440,000        
Line of Credit Facility, Interest Rate at Period End 1.20% 1.70%          
Line of Credit Facility, Commitment Fee Percentage           0.25% 0.75%
Repayments of Long-term Lines of Credit (in Dollars)     $ 3,100,000