Condensed Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Condensed Consolidated Statements of Operations (Unaudited) [Abstract]
Revenues	$ 9,102	$ 6,291	$ 21,467	$ 20,188
Operating expenses:
Voyage expenses	238	254	977	686
Voyage expenses to Parent	118	82	272	260
Vessel operating expenses	4,219	4,281	12,332	12,474
General, administrative, and technical management fees	1,144	1,069	3,619	3,525
Management fees to Parent	659	621	1,881	1,850
Depreciation	3,847	3,724	11,172	11,090
Total operating expenses	10,225	10,031	30,253	29,885
Operating loss	(1,123)	(3,740)	(8,786)	(9,697)
Other (expense) income:
Other expense	(12)	(15)	(8)	(22)
Interest income	5	1	8	4
Interest expense	(1,132)	(1,064)	(3,171)	(3,201)
Other expense, net	(1,139)	(1,078)	(3,171)	(3,219)
Loss before income taxes	(2,262)	(4,818)	(11,957)	(12,916)
Income tax expense	(8)	(4)	(22)	(26)
Net loss	$ (2,270)	$ (4,822)	$ (11,979)	$ (12,942)
Net loss per share of common and Class B Stock:
Net loss per share-basic (in dollars per share)	$ (0.08)	$ (0.22)	$ (0.46)	$ (0.58)
Net loss per share-diluted (in dollars per share)	$ (0.08)	$ (0.22)	$ (0.46)	$ (0.58)
Dividends declared per share of common and Class B Stock (in dollars per share)	$ 0.01	$ 0.05	$ 0.03	$ 0.23