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v3.21.1

Note 1 - Basis of Presentation and General Information (Details Textual) |  |  |  |  |  |  |  |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Aug. 10, 2020 | Aug. 07, 2020 | May 28, 2020 USD ($) T | May 06, 2020 USD ($) T | Dec. 18, 2019 USD ($) T | Aug. 22, 2019 | Mar. 26, 2018 | Jan. 31, 2018 USD ($) T | Jun. 30, 2018 USD ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($)
Payments to Acquire Businesses, Gross |  |  |  |  |  |  |  |  |  | $ 62,000,000 | $ 14,350,000 | $ 23,450,000
Reverse Stock Split [Member] |  |  |  |  |  |  |  |  |  |  |  |
Stockholders' Equity Note, Stock Split, Conversion Ratio | 25 | 25 |  |  |  | 20 | 10 |  |  |  |  |
COVID 19 [Member] |  |  |  |  |  |  |  |  |  |  |  |
Decrease in Revenues from Off-hire Days |  |  |  |  |  |  |  |  |  | 487,000 |  |
PCH Dreaming, Inc. [Member] |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition, Percentage of Voting Interests Acquired |  |  |  |  |  |  |  | 100.00% |  |  |  |
Business Combination, Consideration Transferred, Total |  |  |  |  |  |  |  | $ 3,950,000 |  |  |  |
Charter Term (Year) |  |  |  |  |  |  |  | 1 year | 5 years |  |  |
Charter Rate Per Day |  |  |  |  |  |  |  | $ 16,000 | $ 15,100 |  |  |
Charter Option To Extend Term (Year) |  |  |  |  |  |  |  | 2 years |  |  |  |
Charter Option to Extend, Rate Per Day, Year One |  |  |  |  |  |  |  | $ 17,000 |  |  |  |
Charter Option to Extend, Rate Per Day, Year Two |  |  |  |  |  |  |  | $ 18,000 |  |  |  |
PCH Dreaming, Inc. [Member] | M/T Eco Marina Del Ray [Member] |  |  |  |  |  |  |  |  |  |  |  |
Size of Vessel (US Ton) | T |  |  |  |  |  |  |  | 50,000 |  |  |  |
South California, Inc. [Member] |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition, Percentage of Voting Interests Acquired |  |  |  |  |  |  |  | 100.00% |  |  |  |
Size of Vessel (US Ton) | T |  |  |  |  |  |  |  | 157,000 |  |  |  |
Business Combination, Consideration Transferred, Total |  |  |  |  |  |  |  | $ 8,950,000 |  |  |  |
Charter Term (Year) |  |  |  |  |  |  |  | 1 year | 3 years |  |  |
Charter Rate Per Day |  |  |  |  |  |  |  | $ 25,000 | $ 24,500 |  |  |
Charter Option To Extend Term (Year) |  |  |  |  |  |  |  | 2 years | 2 years |  |  |
Charter Option to Extend, Rate Per Day, Year One |  |  |  |  |  |  |  | $ 26,000 | $ 28,000 |  |  |
Charter Option to Extend, Rate Per Day, Year Two |  |  |  |  |  |  |  | $ 27,000 | $ 29,500 |  |  |
Malibu Warrior, Inc. [Member] |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition, Percentage of Voting Interests Acquired |  |  |  |  |  |  |  | 100.00% |  |  |  |
Size of Vessel (US Ton) | T |  |  |  |  |  |  |  | 157,000 |  |  |  |
Business Combination, Consideration Transferred, Total |  |  |  |  |  |  |  | $ 8,950,000 |  |  |  |
Charter Term (Year) |  |  |  |  |  |  |  | 1 year | 3 years |  |  |
Charter Rate Per Day |  |  |  |  |  |  |  | $ 25,000 | $ 24,500 |  |  |
Charter Option To Extend Term (Year) |  |  |  |  |  |  |  | 2 years | 2 years |  |  |
Charter Option to Extend, Rate Per Day, Year One |  |  |  |  |  |  |  | $ 26,000 | $ 28,000 |  |  |
Charter Option to Extend, Rate Per Day, Year Two |  |  |  |  |  |  |  | $ 27,000 | $ 29,500 |  |  |
ECO Seven, Inc. [Member] |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition, Percentage of Voting Interests Acquired |  |  |  |  |  |  |  | 10.00% |  |  |  |
Business Combination, Consideration Transferred, Total |  |  |  |  |  |  |  | $ 1,600,000 |  |  |  |
Business Combination, Step Acquisition, Equity Interest in Acquiree, including Subsequent Acquisition, Percentage, Total |  |  |  |  |  |  |  | 100.00% |  |  |  |
Santa Catalina Inc. and Santa Monica Inc. [Member] |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition, Percentage of Voting Interests Acquired |  |  |  |  | 100.00% |  |  |  |  |  |  |
Santa Catalina Inc. and Santa Monica Inc. [Member] | Asset under Construction [Member] |  |  |  |  |  |  |  |  |  |  |  |
Size of Vessel (US Ton) | T |  |  |  |  | 50,000 |  |  |  |  |  |  |
Business Combination, Consideration Transferred, Total |  |  |  |  | $ 14,350,000 |  |  |  |  |  |  |
Charter Term (Year) |  |  |  |  | 3 years |  |  |  |  |  |  |
Charter Rate Per Day |  |  |  |  | $ 17,500 |  |  |  |  |  |  |
Charter Option To Extend Term (Year) |  |  |  |  | 2 years |  |  |  |  |  |  |
Charter Option to Extend, Rate Per Day, Year One |  |  |  |  | $ 18,750 |  |  |  |  |  |  |
Charter Option to Extend, Rate Per Day, Year Two |  |  |  |  | $ 20,000 |  |  |  |  |  |  |
Number of Vessels |  |  |  |  | 2 |  |  |  |  |  |  |
Advances of Shipyard Installments |  |  |  |  | $ 7,515,000 |  |  |  |  |  |  |
Capitalized Contract Cost, Net, Total |  |  |  |  | 134,000 |  |  |  |  |  |  |
Santa Catalina Inc. and Santa Monica Inc. [Member] | Asset under Construction [Member] | Payable Upon Purchase of the Vessel Owning Companies [Member] |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Contingent Consideration, Liability, Total |  |  |  |  | 7,515,000 |  |  |  |  |  |  |
Santa Catalina Inc. and Santa Monica Inc. [Member] | Asset under Construction [Member] | Payable Upon Delivery of the Vessels From the Shipyard [Member] |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Contingent Consideration, Liability, Total |  |  |  |  | $ 6,835,000 |  |  |  |  |  |  |
Three Marshall Islands Companies [Member] |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition, Percentage of Voting Interests Acquired |  |  |  | 100.00% |  |  |  |  |  |  |  |
Business Combination, Consideration Transferred, Total |  |  |  | $ 18,000,000 |  |  |  |  |  |  |  |
Charter Term (Year) |  |  |  | 5 years |  |  |  |  |  |  |  |
Charter Rate Per Day |  |  |  | $ 16,200 |  |  |  |  |  |  |  |
Charter Option To Extend Term (Year) |  |  |  | 2 years |  |  |  |  |  |  |  |
Charter Rate Per Day, Optional Year One |  |  |  | $ 17,200 |  |  |  |  |  |  |  |
Charter Rate Per Day, Optional Year Two |  |  |  | $ 18,200 |  |  |  |  |  |  |  |
Payments to Acquire Businesses, Gross |  |  |  |  |  |  |  |  |  | 16,850,000 |  |
Three Marshall Islands Companies [Member] | Due to Related Parties [Member] |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Contingent Consideration, Liability, Total |  |  |  |  |  |  |  |  |  | $ 1,150,000 |  |
Three Marshall Islands Companies [Member] | Asset under Construction [Member] |  |  |  |  |  |  |  |  |  |  |  |
Size of Vessel (US Ton) | T |  |  |  | 50,000 |  |  |  |  |  |  |  |
Two Marshall Islands Companies [Member] |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition, Percentage of Voting Interests Acquired |  |  | 50.00% |  |  |  |  |  |  |  |  |
Business Combination, Consideration Transferred, Total |  |  | $ 22,000,000 |  |  |  |  |  |  |  |  |
Charter Term (Year) |  |  | 3 years |  |  |  |  |  |  |  |  |
Charter Rate Per Day |  |  | $ 33,950 |  |  |  |  |  |  |  |  |
Charter Option To Extend Term (Year) |  |  | 2 years |  |  |  |  |  |  |  |  |
Charter Rate Per Day, Optional Year One |  |  | $ 34,750 |  |  |  |  |  |  |  |  |
Charter Rate Per Day, Optional Year Two |  |  | $ 36,750 |  |  |  |  |  |  |  |  |
Two Marshall Islands Companies [Member] | Asset under Construction [Member] |  |  |  |  |  |  |  |  |  |  |  |
Size of Vessel (US Ton) | T |  |  | 157,000 |  |  |  |  |  |  |  |  |
City of Athens [Member] |  |  |  |  |  |  |  |  |  |  |  |
Equity Method Investment, Ownership Percentage |  |  |  |  |  |  |  |  |  | 50.00% |  |
Eco Nine [Member] |  |  |  |  |  |  |  |  |  |  |  |
Equity Method Investment, Ownership Percentage |  |  |  |  |  |  |  |  |  | 50.00% |  |
California 19 Inc. [Member] |  |  |  |  |  |  |  |  |  |  |  |
Equity Method Investment, Ownership Percentage |  |  |  |  |  |  |  |  |  | 50.00% |  |
California 20 Inc. [Member] |  |  |  |  |  |  |  |  |  |  |  |
Equity Method Investment, Ownership Percentage |  |  |  |  |  |  |  |  |  | 50.00% |  |

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