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Note 2 - Significant Accounting Policies (Tables) | 6 Months Ended
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Jun. 30, 2019
Notes Tables |
Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block] |
As of January 1, 2019: | Under ASC 842 |  | Under ASC 840 |  | Increase/(decrease)
Current assets: | - |  |  |  |
Prepaid bareboat charter hire | - |  | 1,656 |  | (1,656)
Other noncurrent assets: | - |  |  |  |
Prepaid bareboat charter hire | - |  | 3,621 |  | (3,621)
Fixed assets: |  |  |  |  |
Right of use assets from operating leases* | 21,905 |  | - |  | 21,905
Other current liabilities: |  |  |  |  |
Current portion of Operating lease liabilities | 4,771 |  | - |  | 4,771
Other noncurrent liabilities: |  |  |  |  |
Non-current portion of Operating lease liabilities | 11,857 |  | - |  | 11,857

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