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Note 10 - Related Party Transactions (Details Textual) - USD ($)			12 Months Ended
	Sep. 30, 2018	Mar. 01, 2018	Dec. 31, 2018	Dec. 31, 2017	Jan. 01, 2018	May 31, 2017
Notes Receivable, Related Parties			$ 8,540,949	$ 6,860,056
Notes, Loans and Financing Receivable, Net, Noncurrent, Total				764,493
Accounts Payable, Related Parties, Current			3,923,120	4,075,927
Contract with Customer, Liability, Current			166,490	1,350,296
Property, Plant and Equipment, Net, Ending Balance	$ 22,650,021		22,650,021	21,709,467
Depreciation, Total			2,134,832	2,004,374
Revenue from Contract with Customer, Including Assessed Tax			291,006,698	295,549,980
Related Party Transaction, Purchases from Related Party			31,676,828	32,221,005
NSG International Inc [Member]
Notes Receivable, Related Parties			6,092,397	5,993,552
Eastern Fresh LLC [Member]
Notes Receivable, Related Parties				316,504
R&N Holdings [Member] \| Building [Member]
Property, Plant and Equipment, Net, Ending Balance			400,000	400,000
Depreciation, Total			100,000	89,743
Rental Income, Nonoperating			45,600	45,600
HG Realty [Member] \| Building [Member]
Property, Plant and Equipment, Net, Ending Balance			3,223,745	3,223,745
Depreciation, Total			433,966	351,306
Rental Income, Nonoperating			480,000	490,000
Related Parties [Member]
Revenue from Contract with Customer, Including Assessed Tax			18,147,003	18,449,864
Enson Seafood GA Inc [Member]
Notes Receivable, Related Parties			$ 1,987,241	$ 550,000
Promissory Note Agreement [Member] \| Eastern Fresh LLC [Member]
Debt Instrument, Interest Rate, Stated Percentage						5.00%
Notes, Loans and Financing Receivable, Net, Noncurrent, Total						$ 1,000,000
Promissory Note Agreement [Member] \| Enson Seafood GA Inc [Member]
Notes Payable, Total	$ 2,000,000				$ 550,000
Debt Instrument, Interest Rate, Stated Percentage	5.00%		5.00%
Debt Instrument, Periodic Payment, Total	$ 171,214.96
Debt Instrument, Term	1 year
Promissory Note Agreement [Member] \| NSG International Inc [Member]
Notes Payable, Total					$ 5,993,552
Debt Instrument, Interest Rate, Stated Percentage					5.00%
Promissory Note Agreement [Member] \| Revolution Automotive LLC [Member]
Notes Payable, Total		$ 483,628
Debt Instrument, Interest Rate, Stated Percentage		5.00%
Debt Instrument, Periodic Payment, Total		$ 5,000
Debt Instrument, Term		5 years
Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid		$ 284,453
Allstate Trading Company Inc [Member] \| Mr Zhou Min Ni [Member]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners			40.00%
Enson Seafood GA Inc [Member] \| Mr Zhou Min Ni [Member]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners			50.00%
Eagle Food Service LLC [Member] \| Tina Ni [Member]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners			50.00%
Fortune One Foods Inc [Member] \| Mr Zhou Min Ni [Member]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners			17.50%
Eastern Fresh LLC [Member] \| Mr Zhou Min Ni [Member]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners			30.00%
New Marco Foods Inc [Member] \| Mr Zhou Min Ni [Member]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners			30.00%
Enson Trading LLC [Member] \| Mr Zhou Min Ni [Member]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners			25.00%
Enson Philadelphia Inc [Member] \| Mr Zhou Min Ni [Member]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners			25.00%
Hengfeng Food Service Inc [Member] \| Mr Zhou Min Ni [Member]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners			45.00%
Ocean Pacific Seafood Group [Member] \| Mr Zhou Min Ni [Member]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners			25.00%
Han Feng Information Tech Jinhua Inc [Member] \| Mr Zhou Min Ni [Member]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners			37.00%
NSG International Inc [Member] \| Mr Zhou Min Ni [Member]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners			30.00%
Revolution Industry LLC [Member] \| Mr Zhou Min Ni [Member]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners			100.00%
Revolution Automotive LLC [Member] \| Raymond Ni [Member]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners			100.00%
First Choice Seafood [Member] \| Mr Zhou Min Ni [Member] \| Enson Seafood GA Inc [Member]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners			50.00%