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Note 1 - Basis of Presentation and General Information (Detail) - Charterers Percentage of Revenue	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Charterer A [Member]
Charterer			10.00%
Charterer B [Member]
Charterer	12.00%	14.00%	12.00%
Charterer C [Member]
Charterer			11.00%
Charterer D [Member]
Charterer			10.00%

X

- Definition

Percentage of revenue generated from a single external customer that accounts for 10 percent or more of an entity's revenues.

+ References

No definition available.

+ Details

Name:	us-gaap_EntityWideRevenueMajorCustomerPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration