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Note 3 -Transactions with Related Parties (Detail) (USD $) | 12 Months Ended | 1 Months Ended |  | 12 Months Ended
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Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2012 Reimbursed Compensation Manager [Member] | Dec. 31, 2011 Reimbursed Compensation Manager [Member] | Dec. 31, 2010 Reimbursed Compensation Manager [Member] | Dec. 31, 2012 Office Space Rent [Member] | Dec. 31, 2011 Office Space Rent [Member] | Dec. 31, 2010 Office Space Rent [Member] | Dec. 31, 2012 Emihar Petroleum Inc [Member] | Sep. 28, 2012 Affiliated Company [Member] | Dec. 31, 2012 Affiliated Company [Member] | Dec. 31, 2012 Additional Charge Per Day For Superintendent Engineers Onboard The Vessel [Member] | Dec. 31, 2012 Superintendent Fees [Member] | Dec. 31, 2011 Superintendent Fees [Member] | Dec. 31, 2010 Superintendent Fees [Member] | Dec. 31, 2012 Commission Expenses [Member] | Dec. 31, 2011 Commission Expenses [Member] | Dec. 31, 2010 Commission Expenses [Member] | Dec. 31, 2012 Vessels' Operating Expenses [Member]
Management Fee Per Day Per Vessel | $ 440 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Management Fee Per Day Per Vessel Under Bareboat Charter | 125 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vessel Brokerage Commission Pecentage | 1.25% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vessel Brokerage Commission | 1,472,410 | 1,474,495 | 1,396,877 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Professional and Contract Services Expense | 4,315,720 | 4,760,865 | 5,184,055 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction, Expenses from Transactions with Related Party |  |  |  |  |  |  |  |  |  |  |  |  | 500 | 175,500 | 208,000 | 0 |  |  |  |
Sales and Purchase Broker Commission Fee Percentage | 1.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Salesand Purchase Broker Commission Fee | 634,479 | 621,745 | 565,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net (gain) loss on sale of vessels |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 192,000 | 258,500 | 381,300 |
General and Administrative Expense | 2,838,759 | 2,646,418 | 3,031,491 | 1,552,541 | 1,192,266 | 1,311,363 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Due to Related Parties, Current | 7,288,899 | 7,874,990 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction, Amounts of Transaction |  |  |  |  |  |  | 76,420 | 57,850 | 55,214 |  |  |  |  |  |  |  |  |  |  | 1,741,802
Revenue from Related Parties | 4,364,992 |  |  |  |  |  |  |  |  | 4,364,992 |  |  |  |  |  |  |  |  |  |
Vessel Purchase Price |  |  |  |  |  |  |  |  |  |  |  | 96,000,000 |  |  |  |  |  |  |  |
Advances Percentage For Vessels Under Construction Acquisitions |  |  |  |  |  |  |  |  |  |  | 20.00% |  |  |  |  |  |  |  |  |
Advances for vessels under construction and acquisitions | $ 61,632,129 | $ 52,797,646 |  |  |  |  |  |  |  |  | $ 19,200,000 |  |  |  |  |  |  |  |  |

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- Definition Carrying amount as of the balance sheet date of obligations due all related parties. For classified balance sheets, represents the current portion of such liabilities (due within one year or within the normal operating cycle if longer). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 57 -Paragraph 2 -Subparagraph d -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. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(a)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(k)(1)) -URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19 -Subparagraph a -Article 5 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph k -Subparagraph 1 -Article 4 + Details
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