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Note 6 - Financial Instruments and Fair Value (Details) - Derivative Financial Instruments (USD $) In Thousands, unless otherwise specified | 9 Months Ended
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Sep. 30, 2013
Derivative [Line Items] |
Notional Amount | $ 39,200
Interest Rate Swap Agreement 1 [Member] |
Derivative [Line Items] |
Notional Amount | 1,911
Fixed Interest Rate | 5.075%
Underlying Rate | 3 month LIBOR
Expiration Date | Jul. 01, 2015
Fair Value | (61)
Interest Rate Swap Agreement 2 [Member] |
Derivative [Line Items] |
Notional Amount | 3,948
Fixed Interest Rate | 5.075%
Underlying Rate | 3 month LIBOR
Expiration Date | Jul. 01, 2015
Fair Value | (126)
Interest Rate Swap Agreement 7 [Member] |
Derivative [Line Items] |
Notional Amount | 6,840
Fixed Interest Rate | 5.39%
Underlying Rate | 1 month LIBOR
Expiration Date | Dec. 31, 2014
Fair Value | (169)
Interest Rate Swap Agreement 3 [Member] |
Derivative [Line Items] |
Notional Amount | 1,322
Fixed Interest Rate | 5.39%
Underlying Rate | 1 month LIBOR
Expiration Date | Dec. 31, 2014
Fair Value | (33)
Interest Rate Swap Agreement 4 [Member] |
Derivative [Line Items] |
Notional Amount | 2,354
Fixed Interest Rate | 5.39%
Underlying Rate | 1 month LIBOR
Expiration Date | Dec. 31, 2014
Fair Value | (58)
Interest Rate Swap Agreement 5 [Member] |
Derivative [Line Items] |
Notional Amount | 5,326
Fixed Interest Rate | 5.39%
Underlying Rate | 1 month LIBOR
Expiration Date | Dec. 31, 2014
Fair Value | (132)
Interest Rate Swap Agreement 6 [Member] |
Derivative [Line Items] |
Notional Amount | 4,888
Fixed Interest Rate | 5.38%
Underlying Rate | 1 month LIBOR
Expiration Date | Jun. 29, 2015
Fair Value | (185)
Interest Rate Swap Agreement 8 [Member] |
Derivative [Line Items] |
Notional Amount | 752
Fixed Interest Rate | 5.29%
Underlying Rate | 1 month LIBOR
Expiration Date | Jun. 30, 2015
Fair Value | (27)
Interest Rate Swap Agreement 9 [Member] |
Derivative [Line Items] |
Notional Amount | 1,441
Fixed Interest Rate | 5.29%
Underlying Rate | 1 month LIBOR
Expiration Date | Jun. 30, 2015
Fair Value | (53)
Interest Rate Swap Agreement 10 [Member] |
Derivative [Line Items] |
Notional Amount | 7,269
Fixed Interest Rate | 5.29%
Underlying Rate | 1 month LIBOR
Expiration Date | Jun. 30, 2015
Fair Value | (265)
Interest Rate Swap Agreement 11 [Member] |
Derivative [Line Items] |
Notional Amount | 627
Fixed Interest Rate | 5.29%
Underlying Rate | 1 month LIBOR
Expiration Date | Jun. 30, 2015
Fair Value | (23)
Interest Rate Swap Agreement 12 [Member] |
Derivative [Line Items] |
Notional Amount | 2,519
Fixed Interest Rate | 5.29%
Underlying Rate | 1 month LIBOR
Expiration Date | Jun. 30, 2015
Fair Value | $ (92)

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- Definition Fair value of all liability derivatives designated as cash flow hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624163-113959 + Details
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Balance Type: | credit
Period Type: | instant

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- Definition Nominal or face amount used to calculate payments on the derivative asset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5580258-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5579245-113959 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Notional Amount -URI http://asc.fasb.org/extlink&oid=6519104 + Details
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- Definition The reference rate for the variable rate of the interest rate derivative, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR. + References No definition available. + Details
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Balance Type: | na
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- Details
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Balance Type: | na
Period Type: | duration

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- Definition Date the derivative contract matures, in CCYY-MM-DD format. + References No definition available. + Details
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- Definition Fixed interest rate that will be received or paid upon exercise of the interest rate swaption contract. + References No definition available. + Details
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Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant