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3. Revenue Recognition (Details 3) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Accounts receivable of three largest customers | $ 118,529 | $ 77,057
Total percentage of accounts receivable | 50.00% | 27.00%
Nutreco Canada Inc. |  |
Accounts receivable of three largest customers | $ 21,619 | $ 21,219
Earth Innovations Inc. |  |
Accounts receivable of three largest customers | 68,055 | 15,184
Ralco Mix |  |
Accounts receivable of three largest customers | 16,600 | 12,800
Premier Tech |  |
Accounts receivable of three largest customers | 12,255 | 0
Lake Shore Gold |  |
Accounts receivable of three largest customers | $ 0 | $ 27,854

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