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Commitments and Contigencies 2 (Details) - Spanish port authorities environmental fines - Star Cosmo | 3 Months Ended | 8 Months Ended |  |
--- | --- | --- | --- | ---
Mar. 31, 2015 USD ($) | Mar. 31, 2015 EUR (€) | Mar. 31, 2012 EUR (€) | Aug. 31, 2016 USD ($) | Aug. 31, 2016 EUR (€) | Jun. 30, 2016 USD ($) | Jun. 30, 2016 EUR (€) | Jul. 31, 2011 USD ($) | Jul. 31, 2011 EUR (€)
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Cash collateral to guarantee the payment of fines |  |  |  |  |  |  |  | $ 377,000 | € 340,000
Exchange rate EUR/USD |  |  |  |  |  | 1.11 | 1.11 |  |
Cash collateral for pollution release |  |  | € 340,000 |  |  |  |  |  |
Litigation Settlement, Amount | $ 67,000 | € 60,000 |  |  |  |  |  |  |
Subsequent Event |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Litigation Settlement, Amount |  |  |  | $ 222,000 | € 200,000 |  |  |  |
Maximum |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Loss contigency, Estimate of possible loss |  |  |  |  |  | $ 289,000 | € 260,000 |  |

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