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Note 16 - Derivative Financial Instruments (Detail) (USD $)
 0 Months Ended 12 Months Ended 12 Months Ended 0 Months Ended 12 Months Ended 48 Months Ended 60 Months Ended 12 Months Ended
Jan. 21, 2016
Jul. 14, 2013
Jan. 21, 2011
Jul. 09, 2009
Dec. 31, 2012
Dec. 31, 2010
Dec. 31, 2011
Jul. 08, 2009
First Two Contracts [Member]
Eurobank [Member]
Jan. 21, 2011
Last Contract [Member]
Eurobank [Member]
Dec. 31, 2011
Swap One [Member]
Dec. 31, 2011
Swap Two [Member]
Dec. 31, 2011
Swap Three [Member]
Dec. 31, 2009
Forward Contracts [Member]
Minimum [Member]
Dec. 31, 2010
Forward Contracts [Member]
Maximum [Member]
Dec. 31, 2008
Forward Contracts [Member]
Jul. 08, 2014
Eurobank [Member]
Jul. 14, 2008
Eurobank [Member]
Dec. 31, 2011
Eurobank [Member]
Jul. 08, 2013
Eurobank [Member]
Jan. 21, 2016
Eurobank [Member]
Jul. 14, 2013
Eurobank [Member]
Jan. 31, 2011
Eurobank [Member]
Jul. 08, 2009
Eurobank [Member]
Dec. 31, 2010
Put Option [Member]
Dec. 31, 2010
Call Option [Member]
Derivative, Number of Instruments Held         3 3 3               6   3         3 3    
Derivative, Inception Date     Jan. 21, 2011 Jul. 08, 2009                         Jul. 14, 2008   Jul. 08, 2009 Jan. 21, 2011 Jul. 14, 2008        
Derivative Liability, Notional Amount (in Dollars)               $ 25,000,000 $ 10,000,000                                
Derivative, Fixed Interest Rate                   3.99% 2.88% 2.29%                          
Derivative, Remaining Maturity                         480 days 485 years       5 years           360 days 360 days
Derivative, Maturity Date Jan. 21, 2016 Jul. 14, 2013                           Jul. 08, 2014                  
Average Time Charter Equivalent Per Day (in Dollars)                         11,350 11,430                      
Derivative, Description of Terms         The contracts are settled on a monthly basis using the average of the BPI for the days of the month the BPI is published.The Company received a payment if the average BPI for the month was below the contract rate equal to the difference of the contract rate less the average BPI for the month times the number of contract days sold; if the average BPI for the month was greater than the contract rate the Company made a payment equal to the difference of the average BPI for the month less the contract rate times the number of contract days sold. If the Company buys contracts previously sold (or the opposite) the Company receives or pays the difference of the two rates for the period covered by the contracts.                                        
Option Indexed to Issuer's Equity, Strike Price (in Dollars per Day)           16,500                                     23,500
Derivative, Gain (Loss) on Derivative, Net (in Dollars)           $ 336,552