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Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands | Total | Common Stock | Additional Paid-in Capital | Other Comprehensive income/(loss) | Accumulated deficit | Acquisition of 33% of Interchart (Note 9) | Acquisition of 33% of Interchart (Note 9) Common Stock | Acquisition of 33% of Interchart (Note 9) Additional Paid-in Capital | Merger & Pappas Transaction (Note 1) | Merger & Pappas Transaction (Note 1) Common Stock | Merger & Pappas Transaction (Note 1) Additional Paid-in Capital | Heron Transaction in escrow account (Note 1) | Heron Transaction in escrow account (Note 1) Common Stock | Heron Transaction in escrow account (Note 1) Additional Paid-in Capital | Excel Transactions (Note 1) | Excel Transactions (Note 1) Common Stock | Excel Transactions (Note 1) Additional Paid-in Capital
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BALANCE, value at Dec. 31, 2013 | $ 266,106 | $ 58 | $ 668,452 | $ 0 | $ (402,404) |  |  |  |  |  |  |  |  |  |  |  |
BALANCE, shares at Dec. 31, 2013 |  | 5,811,906 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income/(loss) for the year ended | (11,723) |  |  |  | (11,723) |  |  |  |  |  |  |  |  |  |  |  |
Other comprehensive loss | (378) |  |  | (378) |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock (Note 1 and Note 9), value |  |  |  |  |  | $ 328 |  | $ 328 | $ 616,272 | $ 104 | $ 616,168 | $ 25,079 | $ 4 | $ 25,075 | $ 252,784 | $ 51 | $ 252,733
Issuance of common stock (Note 1 and Note 9), shares |  |  |  |  |  |  | 4,520 |  |  | 10,397,699 |  |  | 423,141 |  |  | 5,131,885 |
Issuance of vested and non-vested shares and amortization of stock-based compensation (Note 12), value | 5,834 | $ 1 | 5,833 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of vested and non-vested shares and amortization of stock-based compensation (Note 12), shares |  | 116,068 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
BALANCE, value at Dec. 31, 2014 | 1,154,302 | $ 218 | 1,568,589 | (378) | (414,127) |  |  |  |  |  |  |  |  |  |  |  |
BALANCE, shares at Dec. 31, 2014 |  | 21,885,219 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income/(loss) for the year ended | (458,177) |  |  |  | (458,177) |  |  |  |  |  |  |  |  |  |  |  |
Other comprehensive loss | (838) |  |  | (838) |  |  |  |  |  |  |  |  |  |  |  |  |
Amortization of stock-based compensation (Note 12) | 2,684 |  | 2,684 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock (Note 9), value | 417,797 | $ 211 | 417,586 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock (Note 9), shares |  | 21,050,084 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of vested and non-vested shares and amortization of stock-based compensation (Note 12), value | 19,308 | $ 9 | 19,299 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of vested and non-vested shares and amortization of stock-based compensation (Note 12), shares |  | 851,577 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of shares for commission to Oceanbulk Maritime (Note 3), value | 282 |  | 282 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of shares for commission to Oceanbulk Maritime (Note 3), shares |  | 34,234 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
BALANCE, value at Dec. 31, 2015 | 1,135,358 | $ 438 | 2,008,440 | (1,216) | (872,304) |  |  |  |  |  |  |  |  |  |  |  |
BALANCE, shares at Dec. 31, 2015 |  | 43,821,114 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income/(loss) for the year ended | (154,228) |  |  |  | (154,228) |  |  |  |  |  |  |  |  |  |  |  |
Other comprehensive loss | 922 |  |  | 922 |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock (Note 9), value | 50,278 | $ 120 | 50,158 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock (Note 9), shares |  | 11,976,745 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of vested and non-vested shares and amortization of stock-based compensation (Note 12), value | 4,166 | $ 7 | 4,159 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of vested and non-vested shares and amortization of stock-based compensation (Note 12), shares |  | 692,595 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of shares for commission to Oceanbulk Maritime (Note 3), value | 734 | $ 1 | 733 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of shares for commission to Oceanbulk Maritime (Note 3), shares |  | 138,453 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
BALANCE, value at Dec. 31, 2016 | $ 1,037,230 | $ 566 | $ 2,063,490 | $ (294) | $ (1,026,532) |  |  |  |  |  |  |  |  |  |  |  |
BALANCE, shares at Dec. 31, 2016 |  | 56,628,907 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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