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Restructuring (Details) - USD ($)
3 Months Ended 12 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Restructuring (Details) [Line Items]      
Restructuring Costs $ (39,000) $ 306,000
Restructuring Charges 214,000   51,000
Accrued Liabilities, Current 5,755,000   6,046,000
Gains (Losses) on Restructuring of Debt $ 39,000    
Relocate Equipment And Inventory [Member]      
Restructuring (Details) [Line Items]      
Accrued Liabilities, Current     $ 253,000