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3. ASC Topic 606, Revenue from Contracts with Customers (Details) - USD ($)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Summary Of Significant Accounting Policies Details 2Abstract    
Product sales revenue $ 5,636,839 $ 6,103,741
Royalty revenue 201,000 201,000
Revenues $ 5,837,839 $ 6,304,741