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Note 11 - Derivatives and Fair Value Disclosures (Detail) (USD $) | 12 Months Ended
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Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Derivative, Notional Amount | $ 124,869,347 | $ 142,500,000 |
Derivative, Reference Rate LIBOR | 0.48% |  |
Foreign Currency Forward Contracts Converted, Amount | 5,400,000,000 |  |
Derivative Instruments, Income Statement Location of Gain (Loss) Reclassified from Accumulated OCI | $54,340 | $527,627 | $481,515
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months | $ 7,550 |  |
Minimum [Member] |  |  |
Interest Rate Swap, Fixed Rate | 2.77% |  |
Maximum [Member] |  |  |
Interest Rate Swap, Fixed Rate | 4.73% |  |

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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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- Definition The estimated net amount of existing gains or losses on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=7668309&loc=d3e80748-113994 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 45 -Subparagraph b(2) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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