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Note 15 - Voyage Expenses and Vessel Operating Expenses (Detail) - Vessels' Operating Expenses (USD $) | 12 Months Ended
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Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Crew wages and related costs | $ 19,304,929 | $ 22,044,479 | $ 23,998,949
Insurance | 1,260,289 | 1,410,889 | 1,623,582
Repairs and maintenance | 3,026,513 | 4,940,185 | 4,814,718
Spares and consumable stores | 5,313,053 | 5,886,002 | 5,838,470
Miscellaneous expenses | 1,687,193 | 2,276,598 | 2,062,344
Total | $ 30,591,977 | $ 36,558,153 | $ 38,338,063

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- Definition The expense in the period incurred with respect to protection provided by insurance entities against risks other than risks associated with production (which are allocated to cost of sales). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.4) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 + Details
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- Definition The aggregate amount of expenditures for salaries, wages, profit sharing and incentive compensation, and other employee benefits, including equity-based compensation, and pension and other postretirement benefit expense. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.4) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 + Details
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