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Restructuring Costs - Additional Information (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2021
Sep. 30, 2020
Restructuring and Related Activities [Abstract]      
Restructuring costs $ 0 $ 0 $ 5,714,000
Severance expenses & related payroll taxes   5,076,000  
Asset Impairment Charges   $ 638,000