Consolidated Balance Sheets (Unaudited) (Parentheticals) (USD $)	Jun. 30, 2014	Dec. 31, 2013
Accumulated depreciation, vessels (in Dollars)	$ 426,434,009	$ 389,545,066
Accumulated amortization, other fixed assets (in Dollars)	640,385	574,532
Preferred stock par value (in Dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	25,000,000	25,000,000
Preferred stock, shares issued	0	0
Common stock par value (in Dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	16,933,017	16,783,071
Common stock, shares outstanding	16,933,017	16,783,071
Accumulated dividends declared (in Dollars)	$ 262,118,388	$ 262,118,388