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Contractual Agreements (Details Narrative) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Entity Listings [Line Items]        
Contract research and development expenses $ 786,000 $ 1,200,000 $ 1,700,000 $ 2,900,000
Abbott Products Inc [Member] | Collaborative Arrangement [Member]        
Entity Listings [Line Items]        
Percentage of net sales     1.00%  
Royalties, commitment amount $ 1,000,000.0   $ 1,000,000.0  
Percentage of royalties reduction based upon product launch     50.00%