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Note 7 - Financing Arrangements (Details) (USD $)
0 Months Ended 1 Months Ended 0 Months Ended
Mar. 15, 2012
Aug. 05, 2011
Apr. 30, 2013
HSBC Bank [Member]
Dec. 31, 2012
HSBC Bank [Member]
Aug. 05, 2011
HSBC Bank [Member]
Revolving Credit Facility [Member]
Aug. 05, 2011
HSBC Bank [Member]
Five-Year Term Loan [Member]
Mar. 15, 2012
HSBC Bank [Member]
Aug. 05, 2011
HSBC Bank [Member]
Aug. 01, 2011
Capital One Bank [Member]
Term Loan [Member]
Aug. 01, 2011
Capital One Bank [Member]
Note 7 - Financing Arrangements (Details) [Line Items]                    
Line of Credit Facility, Maximum Borrowing Capacity         $ 7,000,000     $ 9,100,000   $ 5,000,000
Debt Instrument, Face Amount           2,100,000 6,000,000   2,100,000  
Debt Instrument, Interest Rate Terms             Interest presently accrues on the Loan, at our option, at the variable rate of LIBOR plus 1.75% or HSBC's prime rate minus 0.50%. Interest on the unpaid principal balance on this facility accrues at either (i) the LIBOR Rate plus 1.75% or (ii) the bank's prime rate minus 0.50%.    
Debt Instrument, Interest Rate, Stated Percentage   3.045%   1.9166%            
Purchase Price for Property Exclusive of Closing Costs 7,200,000                  
Repayments of Debt     $ 1,309,000