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Inventory (Details) - USD ($)
Jun. 30, 2020
Dec. 31, 2019
Inventory [Line Items]    
Inventory, Raw Materials and Purchased Parts, Net of Reserves $ 10,558,000 $ 13,041,000
Inventory, Work in Process, Net of Reserves 1,623,000 1,818,000
Inventory, Finished Goods, Net of Reserves 4,044,000 6,823,000
Inventory, Net $ 16,225,000 $ 21,682,000