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7. Deferred Revenue (Details Narrative) - USD ($)
Dec. 31, 2020
Dec. 31, 2019
Deferred revenue, current $ 4,432,377 $ 4,432,377
Deferred revenue, noncurrent 5,108,953 $ 5,108,953
Royalty Advance [Member]    
Deferred revenue, current $ 3,367,086