Statement of Financial Position [Abstract] Cash and cash equivalents Cash and cash equivalents at beginning of year Cash and cash equivalents at end of year Trade accounts receivable, net Other receivables Inventories Inventory Restricted cash Prepaid expenses Total current assets Vessels, net Balance, January 1, 2013 Net Book Value Advances for vessels under construction Advance for Vessel Acquisition Restricted cash Deferred charges, net Balance, Balance, Other investments Other investment Balance Balance Investment in joint venture Total long-term assets Total assets Long-term debt, current portion Less: Current portion Trade accounts payable Accrued expenses Total Accrued dividends Dividends Payable, Current (in Dollars) Deferred revenues Due to related company Derivatives Interest rate swap contracts Total current liabilities Long-term debt, net of current portion Long-term portion Derivatives Interest rate contracts Total long-term liabilities Total liabilities Commitments and contingencies Preferred shares (redemption of $0 and $32,140,100, respectively) Preferred Shares Amount Preferred shares, redemption amount (in Dollars) Preferred Stock, Redemption Amount Common stock (par value $0.03, 200,000,000 shares authorized, 45,723,255 and 57,157,313 issued and outstanding) Common stock, par value (in Dollars per share) Common stock, shares authorized Common stock, shares issued Common stock, shares outstanding Additional paid-in capital Accumulated deficit Total shareholders’ equity Balance, January 1, 2012 Balance Total liabilities and shareholders’ equity Income Statement [Abstract] Voyage revenue Related party revenue Revenue from Related Parties Commissions (including $641,104, $474,466 and $517,828, respectively, to related party) Commissions Net revenue Voyage expenses Vessel operating expenses (including $347,840, $399,665, and $347,363, respectively, to related party) Vessel operating expenses Dry-docking expenses Vessel depreciation Depreciation of vessels Accumulated depreciation Net Book Value Related party management fees Other general and administrative expenses (including $1,850,000, $1,900,000, and $2,000,000, respectively, to related party) Net loss on sale of vessels (including $43,823 and$76,183 to related party) Loss on sale of vessels Gain (Loss) on Disposition of Property Plant Equipment Impairment loss Net Book Value Loss Asset Impairment Charges Other operating income Total operating expenses Operating loss Interest and other financing costs Loss on derivatives, net Total loss on derivatives Foreign exchange gain / (loss) Gain on trading securities Investment income Total gain for period included in Investment income Interest income Other expenses, net Equity loss in joint venture Loss in investment in joint venture Income (Loss) from Equity Method Investments Net loss Net loss Dividends to Series B preferred shares Net loss attributable to common shareholders Net loss Net loss attributable to common shareholders’ Loss per share attributable to common shareholders - basic (in Dollars per share) Earnings Per Share, Basic and Diluted (in Dollars per share) Weighted average number of shares outstanding during the year, basic and diluted (in Shares) Statement of Stockholders' Equity [Abstract] Balance, January 1, 2012 (in Shares) Balance,shares (in Shares) Issuance of shares in Rights Offering Program, net of issuance costs Issuance of preferred shares from private placement net of issuance costs Issuance of restricted shares for stock incentive award and share-based compensation Issuance of restricted shares for stock incentive award and share-based compensation (in Shares) Dividends declared Dividends declared, per share Issuance of shares from private placement, net of issuance costs Canceled shares due to repurchase program Canceled shares due to repurchase program (in Shares) Equity Components [Axis] Common Stock [Member] Additional Paid-in Capital [Member] Retained Earnings [Member] Statement of Cash Flows [Abstract] Amortization of deferred charges Share-based compensation Gain on trading securities Proceeds from the sale of trading securities Unrealized gain on derivatives Investment income accrued Investment Income, Dividend Trade accounts receivable Prepaid expenses Other receivables Inventories Due from related company Due to related company Trade accounts payable Accrued expenses Deferred revenue Net cash provided by / (used in) operating activities Advances for vessels under construction Contributions to joint venture Purchase of a vessel Payments to Acquire Property, Plant, and Equipment Other investments Invested amount Change in retention accounts Change in restricted cash Proceeds from sale of vessels Net cash used in investing activities Proceeds from issuance of preferred stock, net of commissions paid Proceeds from issuance of common stock, net of commissions paid Funds used for common stock buyback Offering expenses paid Dividends paid Loan arrangement fees paid Proceeds from long-term debt Repayment of long-term debt Net cash (used in) / provided by financing activities Net increase / (decrease) in cash and cash equivalents Cash paid for interest Offering expenses accrued “Payment-in-kind” dividends Dividends, Paid-in-kind Disclosure Text Block [Abstract] Charterers Individually Accounted for More than 10% of the Company’s Voyage and Time Charter Revenues [Abstract] Concentration Risk Benchmark [Axis] Sales Revenue, Net [Member] Concentration Risk Type [Axis] Customer Concentration Risk [Member] Customer [Axis] Charterer A [Member] Percentage of revenue by charter Charterer B [Member] Charterer C [Member] Charterer D [Member] Charterer E [Member] Charterer F [Member] Charterer G [Member] Accounting Policies [Abstract] Inventory Disclosure [Abstract] Summary of Inventories [Abstract] Inventory [Axis] Lubricant [Member] Victualling [Member] Bunkers [Member] Advances For Vessels Under Construction [Abstract] Property, Plant and Equipment [Abstract] Summary of Vessels [Abstract] Balance, January 1, 2013 Costs Balance, January 1, 2013 Accumulated depreciation - Sale of vessels Costs Net Book Value Costs Deferred Charges [Abstract] Summary of Deferred Charges [Abstract] Amortization of loan arrangement fees Payables and Accruals [Abstract] Summary of Accrued Expenses [Abstract] Related Party Transactions [Abstract] Summary of Long-term Debt [Abstract] Debt Instrument [Axis] Xingang Shipping Ltd. / Alcinoe Shipping Ltd Borrower [Member] Bank loans Manolis Shipping Ltd. Borrower [Member] Saf-Concord Shipping Ltd. Borrower [Member] Eleni Shipping Ltd. Borrower [Member] Pantelis Shipping Corp. Borrower [Member] Aggeliki Shipping Ltd. Borrower [Member] Noumea Shipping Ltd. Borrower [Member] Eirini Shipping Ltd. [Member] Euroseas Ltd (Member) Summary of Future Annual Loan Repayments for Long Term Debt [Abstract] 2015