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Unaudited Interim Condensed Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands | Total | Common Stock | Additional Paid-in Capital | Accumulated Other Comprehensive loss | Accumulated deficit
--- | --- | --- | --- | --- | ---
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) | (81,696) |  |  |  | (81,696)
Other comprehensive income / (loss) | (263) |  |  | (263) |
Issuance of vested and non-vested shares and amortization of stock-based compensation (Note 13), value | 2,285 | $ 2 | 2,283 |  |
Issuance of vested and non-vested shares and amortization of stock-based compensation (Note 13), shares |  | 134,545 |  |  |
BALANCE, value at Jun. 30, 2016 | 1,055,684 | $ 440 | 2,010,723 | (1,479) | (954,000)
BALANCE, shares at Jun. 30, 2016 |  | 43,955,659 |  |  |
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 |  |  |
Net income / (loss) | (26,229) |  |  |  | (26,229)
Other comprehensive income / (loss) | 435 |  |  | 435 |
Issuance of vested and non-vested shares and amortization of stock-based compensation (Note 13), value | 6,360 | $ 5 | 6,355 |  |
Issuance of vested and non-vested shares and amortization of stock-based compensation (Note 13), shares |  | 476,300 |  |  |
Issuance of common stock (Note 9), value | 50,554 | $ 63 | 50,491 |  |
Issuance of common stock (Note 9), shares |  | 6,310,272 |  |  |
BALANCE, value at Jun. 30, 2017 | $ 1,068,350 | $ 634 | $ 2,120,336 | $ 141 | $ (1,052,761)
BALANCE, shares at Jun. 30, 2017 |  | 63,415,479 |  |  |

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