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Note 16 - Financial Instruments (Tables) | 12 Months Ended
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Dec. 31, 2019
Notes Tables |
Fair Value Measurements, Recurring and Nonrecurring [Table Text Block] |
|  | Fair Value Measurement as of December 31, 2018
|  |  | Total, |  |  |  | (Level 1) |  |  |  | (Level 2) |  |  |  | (Level 3) |
Liabilities |  |  |  |  |  |  |  |
Interest rate swap contract, current portion |  | $ | 41,435 |  |  |  | - |  |  | $ | 41,435 |  |  |  | - |
Fair Value Measurements, Nonrecurring [Table Text Block] |
|  | December 31, 2017
|  |  | Fair Value |  |  |  | Level 1 |  |  |  | Level 2 |  |  |  | Level 3 |  |  |  | Loss 2017 |
Vessel profit participating liability |  |  | $1,297,100 |  |  |  | - |  |  |  | $1,297,100 |  |  |  | - |  |  |  | - |
Vessels held for sale |  |  | $5,000,000 |  |  |  | - |  |  |  | $5,000,000 |  |  |  | - |  |  |  | $4,595,819 |
|  | December 31, 2018
|  |  | Fair Value |  |  |  | Level 1 |  |  |  | Level 2 |  |  |  | Level 3 |  |  |  | Loss 2018 |
Vessel profit participating liability |  |  | $1,067,500 |  |  |  | - |  |  |  | $1,067,500 |  |  |  | - |  |  |  | - |
|  |  | December 31, 2019
|  |  | Fair Value |  |  |  | Level 1 |  |  |  | Level 2 |  |  |  | Level 3 |  |  |  | Loss 2019 |
Vessel profit participating liability |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |

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- Definition Tabular disclosure of financial instruments measured at fair value, including those classified in shareholders' equity measured on a recurring or nonrecurring basis. Disclosures include, but are not limited to, fair value measurements recorded and the reasons for the measurements, level within the fair value hierarchy in which the fair value measurements are categorized and transfers between levels 1 and 2. Nonrecurring fair value measurements are those that are required or permitted in the statement of financial position in particular circumstances. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19279-110258 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2C -URI http://asc.fasb.org/extlink&oid=117815213&loc=SL7498348-110258 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bb) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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- Definition Tabular disclosure of assets and liabilities by class, including financial instruments measured at fair value that are classified in shareholders' equity, if any, that are measured at fair value on a nonrecurring basis in periods after initial recognition (for example, impaired assets). Disclosures may include, but are not limited to: (a) the fair value measurements recorded and the reasons for the measurements and (b) the level within the fair value hierarchy in which the fair value measurements are categorized in their entirety (levels 1, 2, 3). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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