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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

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