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Nature of the Business and Summary of Significant Accounting Policies - Inventory (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2020
Dec. 31, 2019
Business Combinations [Abstract]      
Raw materials $ 765,000 $ 765,000  
Work in process 624,000 624,000  
Inventory 1,389,000 1,389,000 $ 0
Inventory written down $ 0 $ 0