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Basis of Presentation and General Information, Going Concern - 6K (Details) $ / shares in Units, $ in Thousands |  |  |  |  |  |  |  |  |  | 1 Months Ended | 9 Months Ended | 12 Months Ended |  |
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Nov. 23, 2016 USD ($) $ / shares shares | Sep. 26, 2016 USD ($) Vessel | Aug. 10, 2016 USD ($) $ / shares shares | Oct. 21, 2015 USD ($) shares | Sep. 29, 2015 USD ($) shares | Sep. 11, 2015 USD ($) shares | Aug. 06, 2015 Vessel | Mar. 12, 2015 USD ($) $ / shares shares | Dec. 19, 2014 USD ($) $ / shares shares | Oct. 21, 2015 USD ($) shares | Sep. 30, 2016 USD ($) $ / shares | Sep. 30, 2015 USD ($) | Dec. 31, 2015 USD ($) Vessel $ / shares | Dec. 31, 2014 USD ($) $ / shares | Dec. 31, 2013 USD ($) | Oct. 28, 2016 $ / shares | Sep. 07, 2015 $ / shares
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of vessels acquired | Vessel |  |  |  |  |  |  |  |  |  |  |  |  | 8 |  |  |  |
Scheduled debt installment payments for next twelve months |  |  |  |  |  |  |  |  |  |  | $ 6,840 |  | $ 950 |  |  |  |
Going Concern [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock (in shares) | shares |  |  | 1,180,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Price per share (in dollars per share) | $ / shares |  |  | $ 4.15 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net proceeds from direct offering |  |  | $ 4,080 |  |  |  |  |  |  |  | $ 4,080 | $ 10,691 | $ 13,820 | $ 3,204 | $ 0 |  |
Common stock, par value (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  |  |  | $ 0.0001 |  | $ 0.0001 | $ 0.0001 |  |  |
Capesize Vessel [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of vessels acquired | Vessel |  |  |  |  |  |  | 5 |  |  |  |  |  |  |  |  |  |
Going Concern [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of vessels to be acquired | Vessel |  | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase price per vessel |  | $ 20,750 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Going Concern [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock (in shares) | shares | 1,305,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Price per share (in dollars per share) | $ / shares | $ 2.75 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net proceeds from direct offering | $ 3,200 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock, par value (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 0.0001 |
Jelco [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Going Concern [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock (in shares) | shares |  |  |  | 3,476,520 | 2,655,740 | 3,889,980 |  | 5,000,100 | 888,000 | 10,022,240 |  |  |  |  |  |  |
Price per share (in dollars per share) | $ / shares |  |  |  |  |  |  |  | $ 0.90 | $ 1.25 |  |  |  |  |  |  |  | $ 0.90
Net proceeds from direct offering |  |  |  | $ 3,129 | $ 2,390 | $ 3,501 |  | $ 4,500 | $ 1,110 | $ 9,020 |  |  |  |  |  |  |
Jelco [Member] | Unsecured Convertible Promissory Note [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Scheduled debt installment payments for next twelve months |  |  |  |  |  |  |  |  |  |  | $ 3,500 |  |  |  |  |  |
Installment payment |  |  |  |  |  |  |  | $ 200 |  |  | $ 200 |  |  |  |  |  |

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