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Restructuring (Details) - USD ($)
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Dec. 31, 2019
Restructuring (Details) [Line Items]          
Restructuring Costs $ 179,000 $ (29,000) $ 179,000 $ 306,000
Restructuring Charges     224,000   53,000
Accrued Liabilities, Current $ 6,137,000   $ 6,137,000   6,046,000
Relocate Equipment And Inventory [Member]          
Restructuring (Details) [Line Items]          
Accrued Liabilities, Current         $ 253,000