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Note 16 - Income Taxes (Details Textual) - USD ($)
3 Months Ended
Mar. 31, 2020
Sep. 30, 2019
Dec. 31, 2019
Deferred Tax Assets, Operating Loss Carryforwards, Revaluation Due to CARES Act $ 300,000    
Deferred Tax Assets, Property, Plant and Equipment   $ 864,000  
Deferred Tax Assets, Goodwill and Intangible Assets     $ 4,800,000
Sale of Manufacturing Facility in North Canton, Ohio [Member]      
Gain (Loss) on Disposition of Property Plant Equipment, Total $ 3,700,000    
Sell Manufacturing Facility In New Windsor, New York [Member]      
Gain (Loss) on Disposition of Property Plant Equipment, Total   $ 4,800,000