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Changes in Cash Flows from Operating Assets and Liabilities - Schedule of Changes in Operating Assets and Liabilities (Details) (10-K) - USD ($)
3 Months Ended 12 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2020
Dec. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]        
Decrease (increase) in accounts receivable $ 106,349 $ (24,279) $ (119,813) $ 48,908
Decrease (increase) in other receivable 135,307 1,391 (121,396) (54,821)
Decrease (increase) in inventory (252,529) 17,441 72,353 122,067
Decrease (increase) in prepaid expenses and deposits (64,594) 8,281 43,201 63,373
Increase (decrease) in lease liability     (27,718) (8,392)
Increase (decrease) in income taxes payable 2,970 11,372 (45,521)
Increase (decrease) in accounts payable and accrued liabilities (4,862) (44,567) (59,284) 405,214
Changes in operating assets and liabilities $ (76,510) $ (49,458) $ (201,284) $ 539,220