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General Information (Details Textual) | Aug. 09, 2017 USD ($) shares | Jun. 30, 2017 USD ($) vessel shares | Jun. 29, 2017 USD ($) shares | Jun. 27, 2017 shares | Dec. 31, 2016 USD ($) shares
--- | --- | --- | --- | --- | ---
Property, Plant and Equipment [Line Items] |  |  |  |  |
Shares of common stock sold to institutional and accredited investors | shares |  | 41,197,404 |  |  | 36,590,417
Common Stock, Value, Issued | $ |  | $ 4,120 |  |  | $ 3,659
Shares issued in connection with share offering, percentage, of then common stock |  | 17.00% |  |  |
Common Stock, Shares, Outstanding | shares |  | 41,197,404 |  |  | 36,590,417
Panamax Ice Class 1A [Member] |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |
Number of vessels |  | 6 |  |  |
Panamax [Member] |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |
Number of vessels |  | 2 |  |  |
Supramax [Member] |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |
Number of vessels |  | 5 |  |  |
Handymax Ice Class 1A [Member] |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |
Number of vessels |  | 2 |  |  |
Ultramax Ice Class 1C [Member] |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |
Number of vessels |  | 2 |  |  |
bareboat charter [Member] | Supramax [Member] |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |
Number of vessels |  | 2 |  |  |
Stock Purchase Agreement sold to institutional and accredited investors [Member] |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |
Consenting Shareholders | shares |  |  |  | 31,304,961 |
% of shareholders approval |  |  |  | 84.00% |
Shares of common stock sold to institutional and accredited investors | shares |  |  | 3,935,665 |  |
Common Stock, Value, Issued | $ |  |  | $ 8,300,000 |  |
Subsequent Event [Member] | Stock Purchase Agreement inside investors [Member] [Member] |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |
Shares of common stock sold to institutional and accredited investors | shares | 2,597,778 |  |  |  |
Common Stock, Value, Issued | $ | $ 5,800,000 |  |  |  |
Stock issued during period, value, issurance of common stock as settlement of accrued dividends | $ | $ 4,400,000 |  |  |  |

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