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Note 7 - Financing Arrangements (Details) (USD $) | 0 Months Ended |  | 1 Months Ended |  |  | 0 Months Ended |
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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 |  |  |  |  |  |  |

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- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6584090&loc=d3e28878-108400 + Details
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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Description of the interest rate as being fixed or variable, and, if variable, identification of the index or rate on which the interest rate is based and the number of points or percentage added to that index or rate to set the rate, and other pertinent information, such as frequency of rate resets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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