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Note 10 - Long-Term Debt (Details) (USD $) | 0 Months Ended | 12 Months Ended | 0 Months Ended | 1 Months Ended | 0 Months Ended | 1 Months Ended | 0 Months Ended | 10 Months Ended | 1 Months Ended | 0 Months Ended | 1 Months Ended |  | 1 Months Ended | 0 Months Ended | 1 Months Ended | 0 Months Ended |  |  | 0 Months Ended | 1 Months Ended |  |  | 0 Months Ended | 1 Months Ended | 0 Months Ended |  | 0 Months Ended | 1 Months Ended | 0 Months Ended | 1 Months Ended | 0 Months Ended
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Jun. 11, 2007 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011 | Nov. 15, 2006 Preceeding 4 Payments (Member) Xingang Shipping Ltd [Member] | Apr. 30, 2009 London Interbank Offered Rate (LIBOR) [Member] Balloon Payment [Member] Eleni Shipping Ltd. [Member] | Dec. 28, 2010 London Interbank Offered Rate (LIBOR) [Member] Tranche A [Member] Noumea Shipping Ltd [Member] | Apr. 08, 2013 London Interbank Offered Rate (LIBOR) [Member] Xingang Shipping Ltd [Member] | Nov. 15, 2006 London Interbank Offered Rate (LIBOR) [Member] Xingang Shipping Ltd [Member] | Nov. 30, 2010 London Interbank Offered Rate (LIBOR) [Member] Trust Navigation Corp [Member] | Oct. 29, 2010 London Interbank Offered Rate (LIBOR) [Member] Trust Navigation Corp [Member] | Jan. 19, 2009 London Interbank Offered Rate (LIBOR) [Member] SAF-Concord Shipping Ltd. [Member] | Oct. 29, 2012 London Interbank Offered Rate (LIBOR) [Member] SAF-Concord Shipping Ltd. [Member] | Apr. 30, 2009 London Interbank Offered Rate (LIBOR) [Member] Eleni Shipping Ltd. [Member] | Dec. 15, 2009 London Interbank Offered Rate (LIBOR) [Member] Pantelis Shipping Corp. [Member] | Nov. 05, 2010 London Interbank Offered Rate (LIBOR) [Member] Aggeliki Shipping Ltd [Member] | Nov. 15, 2006 Four Installments [Member] Xingang Shipping Ltd [Member] | Dec. 15, 2009 Four Installments [Member] Pantelis Shipping Corp. [Member] | Nov. 15, 2006 Sixteen Installments [Member] Xingang Shipping Ltd [Member] | Apr. 05, 2013 Eight Installments [Member] Xingang Shipping Ltd [Member] | Feb. 28, 2008 First Due [Member] Trust Navigation Corp [Member] | Feb. 28, 2008 Next Four Installments [Member] Trust Navigation Corp [Member] | Nov. 30, 2010 Second Fourth Installment [Member] Trust Navigation Corp [Member] | Nov. 30, 2010 Final Installment [Member] Trust Navigation Corp [Member] | Nov. 30, 2010 Refinanced Balloon Payment [Member] Trust Navigation Corp [Member] | Apr. 30, 2009 First Two Installments [Member] Eleni Shipping Ltd. [Member] | Apr. 30, 2009 Second Two Installments [Member] Eleni Shipping Ltd. [Member] | Apr. 30, 2009 Third Two Installments [Member] Eleni Shipping Ltd. [Member] | Apr. 30, 2009 Fourth Two Installments [Member] Eleni Shipping Ltd. [Member] | Apr. 30, 2009 Fifth Four Installments [Member] Eleni Shipping Ltd. [Member] | Apr. 30, 2009 Fourth Four Installments [Member] Eleni Shipping Ltd. [Member] | Dec. 15, 2009 Twenty-Eight Installments [Member] Pantelis Shipping Corp. [Member] | Dec. 28, 2010 Tranche A [Member] Noumea Shipping Ltd [Member] | Dec. 28, 2010 Tranche B [Member] Noumea Shipping Ltd [Member] | Sep. 04, 2006 Prospero Maritime Inc. [Member] | Apr. 05, 2013 Xingang Shipping Ltd [Member] | Nov. 15, 2006 Xingang Shipping Ltd [Member] | Nov. 15, 2015 Xingang Shipping Ltd [Member] | Nov. 02, 2013 Xingang Shipping Ltd [Member] | Jun. 11, 2007 Manolis Shipping Ltd [Member] | Nov. 30, 2010 Trust Navigation Corp [Member] | Aug. 31, 2010 Trust Navigation Corp [Member] | Feb. 28, 2008 Trust Navigation Corp [Member] | Oct. 29, 2010 Trust Navigation Corp [Member] | Oct. 31, 2007 Trust Navigation Corp [Member] | Jan. 19, 2009 SAF-Concord Shipping Ltd. [Member] | Oct. 29, 2012 SAF-Concord Shipping Ltd. [Member] | Apr. 30, 2009 Eleni Shipping Ltd. [Member] | Dec. 15, 2009 Pantelis Shipping Corp. [Member] | Nov. 05, 2010 Aggeliki Shipping Ltd [Member] | Dec. 28, 2010 Noumea Shipping Ltd [Member] | Sep. 04, 2006 First Two Installments [Member] Prospero Maritime Inc. [Member] | Sep. 04, 2006 Second Installment [Member] Prospero Maritime Inc. [Member] | Sep. 04, 2006 Eleven Installments [Member] Prospero Maritime Inc. [Member] | Dec. 28, 2010 Minimum [Member] London Interbank Offered Rate (LIBOR) [Member] Tranche B [Member] Noumea Shipping Ltd [Member] | Sep. 04, 2006 Minimum [Member] London Interbank Offered Rate (LIBOR) [Member] Prospero Maritime Inc. [Member] | Jun. 11, 2007 Minimum [Member] London Interbank Offered Rate (LIBOR) [Member] Manolis Shipping Ltd [Member] | Jun. 11, 2007 Minimum [Member] Manolis Shipping Ltd [Member] | Dec. 28, 2010 Maximum [Member] London Interbank Offered Rate (LIBOR) [Member] Tranche B [Member] Noumea Shipping Ltd [Member] | Sep. 04, 2006 Maximum [Member] London Interbank Offered Rate (LIBOR) [Member] Prospero Maritime Inc. [Member] | Jun. 11, 2007 Maximum [Member] London Interbank Offered Rate (LIBOR) [Member] Manolis Shipping Ltd [Member]
Note 10 - Long-Term Debt (Details) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Face Amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 15,000,000 | $ 5,000,000 | $ 15,500,000 |  | $ 20,000,000 |  |  | $ 10,000,000 |  |  |  |  | $ 15,000,000 | $ 10,000,000 |  | $ 10,000,000 | $ 13,000,000 | $ 8,500,000 | $ 20,000,000 |  |  |  |  |  |  |  |  |  |
Debt Instrument Number Of Semi-Annual Payments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10 | 2 | 2 | 2 | 4 |  |  | 12 |  | 14 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Periodic Payment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 750,000 | 500,000 | 250,000 | 200,000 |  |  | 550,000 |  |  | 100,000 | 400,000 | 600,000 |  |  | 800,000 | 280,000 | 720,000 | 625,000 |  |  | 1,000,000 |  |  | 160,000 | 50,000 |  | 750,000 |  |  | 250,000 | 250,000 |  |  | 303,000 |  | 1,200,000 | 1,000,000 | 825,000 |  |  |  |  |  |  |
Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,400,000 | 2,400,000 |  |  |  |  |  |  |  | 6,360,000 |  | 3,025,000 |  | 5,000,000 | 3,400,000 |  | 4,880,000 | 1,900,000 |  |  |  |  | 5,000,000 | 3,000,000 | 4,600,000 | 3,160,000 | 2,440,000 |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  |  |  |  | 2.70% | 2.65% | 5.30% | 0.935% | 0.90% | 3.75% | 2.50% | 5.00% | 2.50% | 2.70% | 2.85% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2.65% | 0.90% | 0.80% |  | 4.00% | 0.95% | 0.90%
Debt Instrument Minimum Cash Balance |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 300,000 |  |  |  |  | 300,000 |  |  |  | 300,000 |  | 300,000 |  | 300,000 | 300,000 |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument Overall Liquidity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument Number of Quarterly Payments |  |  |  |  | 4 |  |  |  |  |  |  |  |  |  |  |  |  | 4 |  |  | 1,850,000 | 4 |  |  |  |  |  |  |  |  |  | 28 |  |  |  | 8 | 8 |  |  |  | 10 | 4 | 4 |  |  |  |  |  | 32 | 20 |  |  |  |  |  |  |  |  |  |  |
Debt Instrument Number of Consecutive Installments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 8 |  |  | 16 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.90% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Minimum Deposit Requirement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 400,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Number of Periodic Payments | thirty-two |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | twenty | eight |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument Percentage To Fair Market Value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 55.00% |  |  |
Repayments of Bank Debt |  | 15,937,000 | 13,332,000 | 13,472,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5,400,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Term |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5 years |  |  |  |  |  |  |  |  |  |  |  |  |
Limited Dividends Percentage Loans to Profits |  |  | 60.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deposits |  | 7,862,415 | 9,926,011 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest Expense, Debt |  | $ 1,699,951 | $ 1,841,245 | $ 2,046,420 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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