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Note 9 - Derivative Financial Instruments (Details) - Fair value of swaps recognized in accrued liabilities and in other comprehensive income (loss) (USD $) | 3 Months Ended |
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Sep. 30, 2013 | Jun. 30, 2013
Note 9 - Derivative Financial Instruments (Details) - Fair value of swaps recognized in accrued liabilities and in other comprehensive income (loss) [Line Items] |  |
Fair Value | $ (1,709,000) | $ (1,875,000)
June 1, 2010 (1) [Member] |  |
Note 9 - Derivative Financial Instruments (Details) - Fair value of swaps recognized in accrued liabilities and in other comprehensive income (loss) [Line Items] |  |
Notional Amount | 5,000,000 |
Fixed Rate | 2.495% |
Maturity | May 24, 2015 |
Fair Value | (185,000) | (205,000)
June 1, 2010 (2) [Member] |  |
Note 9 - Derivative Financial Instruments (Details) - Fair value of swaps recognized in accrued liabilities and in other comprehensive income (loss) [Line Items] |  |
Notional Amount | 5,000,000 |
Fixed Rate | 2.495% |
Maturity | May 24, 2015 |
Fair Value | (185,000) | (205,000)
June 8, 2010 [Member] |  |
Note 9 - Derivative Financial Instruments (Details) - Fair value of swaps recognized in accrued liabilities and in other comprehensive income (loss) [Line Items] |  |
Notional Amount | 10,000,000 |
Fixed Rate | 2.395% |
Maturity | May 26, 2015 |
Fair Value | (352,000) | (389,000)
June 9, 2010 [Member] |  |
Note 9 - Derivative Financial Instruments (Details) - Fair value of swaps recognized in accrued liabilities and in other comprehensive income (loss) [Line Items] |  |
Notional Amount | 5,000,000 |
Fixed Rate | 2.34% |
Maturity | May 26, 2015 |
Fair Value | (172,000) | (190,000)
June 18, 2010 [Member] |  |
Note 9 - Derivative Financial Instruments (Details) - Fair value of swaps recognized in accrued liabilities and in other comprehensive income (loss) [Line Items] |  |
Notional Amount | 5,000,000 |
Fixed Rate | 2.38% |
Maturity | May 24, 2015 |
Fair Value | (175,000) | (194,000)
September 21, 2011 (1) [Member] |  |
Note 9 - Derivative Financial Instruments (Details) - Fair value of swaps recognized in accrued liabilities and in other comprehensive income (loss) [Line Items] |  |
Notional Amount | 5,000,000 |
Fixed Rate | 1.28% |
Maturity | Sep. 21, 2013 |
Fair Value |  | (14,000)
September 21, 2011 (2) [Member] |  |
Note 9 - Derivative Financial Instruments (Details) - Fair value of swaps recognized in accrued liabilities and in other comprehensive income (loss) [Line Items] |  |
Notional Amount | 5,000,000 |
Fixed Rate | 1.595% |
Maturity | Sep. 22, 2014 |
Fair Value | (69,000) | (83,000)
March 15, 2012 [Member] |  |
Note 9 - Derivative Financial Instruments (Details) - Fair value of swaps recognized in accrued liabilities and in other comprehensive income (loss) [Line Items] |  |
Notional Amount | 10,000,000 |
Fixed Rate | 2.745% |
Maturity | Mar. 15, 2016 |
Fair Value | $ (571,000) | $ (595,000)

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Details
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- Definition Fair value before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=28370219&loc=SL20226000-175313 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=20225523&loc=SL20225862-175312 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (a),(c) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624163-113959 + Details
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- Definition Fixed interest rate related to the interest rate derivative. + References No definition available. + Details
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- Definition Date the derivative contract matures, in CCYY-MM-DD format. + References No definition available. + Details
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