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Inventories (Details) - USD ($)
Dec. 31, 2018
Dec. 31, 2017
Inventory Disclosure [Abstract]    
Raw materials $ 1,291,000 $ 2,393,000
Work-in-process 3,485,000 1,450,000
Finished goods 3,614,000 780,000
Total inventories 8,390,000 4,623,000
Reserve for inventory $ 200,000 $ 0