Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Due from charterers, reserve	$ 133	$ 154
Vessels, accumulated depreciation	40,545	36,906
Fixed assets, accumulated depreciation	39	36
Deferred financing costs, accumulated amortization	$ 1,319	$ 1,204
Common Stock
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	500,000,000	500,000,000
Common stock, shares issued (in shares)	17,300,999	17,300,999
Common stock, shares outstanding (in shares)	17,300,999	17,300,999
Class B Stock
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	100,000,000	100,000,000
Common stock, shares issued (in shares)	5,699,088	5,699,088
Common stock, shares outstanding (in shares)	5,699,088	5,699,088