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Note 12 - Derivatives and Fair Value Disclosures (Details) - Effect of Derivative Instruments on the Statements of Income - USD ($) | 12 Months Ended
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Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Interest Rate Swap — Reclassification from OCI | $ 0 | $ (49,471) | $ 67,849
Total loss on derivatives | (138,653) | (1,348,384) | (27,470)
Total loss on derivatives | (231,931) |  |
Interest Rate Swap [Member] | Other Comprehensive Income (Loss) [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Interest Rate Swap — Reclassification from OCI |  | (49,471) | 67,849
Interest Rate Swap — Change in Fair Value | 1,191,050 | 1,652,692 | 2,716,274
Interest Rate Swap — Realized loss | (1,243,359) | (1,857,362) | $ (2,811,593)
Interest Rate Swap — Loss reclassified from OCI (Effective portion) | (231,931) |  |
Foreign Exchange Future [Member] | Other Comprehensive Income (Loss) [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Foreign Currency Contract — Change in Fair Value | 583,368 | (583,368) |
Foreign Currency Contract — Realized loss.. | $ (669,712) | $ (510,875) |

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- Definition Gain (loss) on derivative instruments that are designated as hedging instruments. + References No definition available. + Details
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- Definition Represents the gains or losses transferred from accumulated other comprehensive income (loss) to the statement of income during the period. + References No definition available. + Details
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- Definition Represents the realized loss on derivative instruments not designated as hedging instruments. + References No definition available. + Details
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- Definition Represents the gains or losses transferred from accumulated other comprehensive income (loss) to the statement of income during the period. + References No definition available. + Details
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- Definition Represents the realized gain (loss) on foreign currency contract(s). + References No definition available. + Details
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- Definition Amount of realized and unrealized gain of derivative instruments not designated or qualifying as 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 4C -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624171-113959 + Details
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- Definition Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as 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 4C -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624171-113959 + Details
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- Definition Amount of realized and unrealized loss of derivative instruments not designated or qualifying as 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 4C -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624171-113959 + Details
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