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Contingent Liabilities and Commitments (Details) - USD ($)
3 Months Ended 12 Months Ended
Mar. 31, 2020
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Contingent Liabilities and Commitments (Textual)            
Purchase of inventory $ 1,072,000          
Other obligations 423,000          
Capital expenditures 36,000          
Capital expenditures committed 1,078,000          
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 $ 28,538     $ 76,876 $ 10,396 $ 5,000