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Note 12 - Acquisition (Details Textual) - USD ($)
4 Months Ended 12 Months Ended
Sep. 04, 2019
Dec. 31, 2019
Dec. 31, 2019
Customer Relationships [Member]      
Finite-Lived Intangible Asset, Useful Life     5 years
BS Plastic [Member]      
Business Acquisition, Percentage of Voting Interests Acquired 100.00%    
Business Combination, Consideration Transferred, Total $ 2,220,150    
Payments to Acquire Businesses, Gross 1,332,090    
Business Combination, Consideration Transferred, Contingent Consideration $ 888,060    
Business Combination, Contingent Consideration Arrangements, Earn Out Period 3 years    
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High $ 888,060    
Business Combination, Acquisition Related Costs $ 29,500    
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual   $ 895,203  
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual   $ 119,633  
BS Plastic [Member] | Customer Relationships [Member]      
Finite-Lived Intangible Asset, Useful Life 5 years