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Unaudited Interim Condensed Consolidated Statements of Operations (USD $) In Thousands, except Share data, unless otherwise specified | 6 Months Ended
--- | ---
Jun. 30, 2013 | Jun. 30, 2012
Revenues: |  |
Voyage revenues | $ 35,362 | $ 49,670
Management fee income (Note 3) | 456 | 137
Total revenues | 35,818 | 49,807
Expenses |  |
Voyage expenses | 4,505 | 14,029
Vessel operating expenses | 13,732 | 14,169
Dry docking expenses | 572 | 1,026
Depreciation | 8,070 | 19,197
Gain on derivative instruments, net (Note 15) | (438) | (64)
General and administrative expenses | 4,709 | 5,337
Gain on time charter agreement termination (Note 7) | 0 | (6,454)
Other operational loss (Note 11) | 562 | 0
Other operational gain (Note 10) | (1,647) | (140)
Loss on sale of vessel (Note 5) | 81 | 3,164
Total Operating Expenses | 30,146 | 50,264
Operating (loss) / income | 5,672 | (457)
Other Income/ (Expenses): |  |
Interest and finance costs (Note 8) | (3,794) | (4,142)
Interest and other income | 86 | 139
Total other expenses, net | (3,708) | (4,003)
Net (loss) / income | $ 1,964 | $ (4,460)
(Loss) / Earnings per share, basic (Note 12) | $ 0.36 | $ (0.83)
(Loss) / Earnings per share, diluted (Note 12) | $ 0.36 | $ (0.83)
Weighted average number of shares outstanding, basic (Note 12) | 5,414,998 | 5,385,359
Weighted average common shares outstanding, diluted (Note 12) | 5,443,639 | 5,385,359

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- Definition Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 07-4 -Paragraph 4 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 171 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 40 -Subparagraph a -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1448-109256 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 8 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Weighted-Average Number of Common Shares Outstanding -URI http://asc.fasb.org/extlink&oid=6528421 + Details
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