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Restructuring - Reconciliation of Restructuring Liability (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2020
Dec. 31, 2019
Restructuring Reserve [Roll Forward]      
Accretion of lease obligations $ 1    
Payments (8)    
Less, short-term restructuring liability   $ 24 $ 24
2017 Restructuring Plan | Facility Closing [Member]      
Restructuring Reserve [Roll Forward]      
Beginning balance 38    
Ending balance 31    
Restructuring liability $ 31 31 $ 38
Less, short-term restructuring liability   24  
Long-term restructuring liability, included in other liabilities   $ 7