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Contingent Liabilities and Commitments (Details) - USD ($)
6 Months Ended 12 Months Ended
Jun. 30, 2020
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2019
Contingent Liabilities and Commitments (Textual)        
Purchase of inventory $ 988,000      
Other obligations 535,000      
Capital expenditures 143,000      
Capital expenditures committed 467,000      
Construct and equip commitment 1,245,000      
Royalty, percentage   4.00%    
Growth assumption, percentage     6.00%  
Royalties due for 2017 5,000      
Royalties due for 2018 10,000      
Royalties due for 2019 15,000      
Royalties due for 2020 20,000      
Royalties due for 2021 (and thereafter) 25,000      
Royalties $ 33,334     $ 76,876