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Intangible Assets - Additional Information (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Intangible Assets        
Amortization of Intangible Assets $ 58,000 $ 58,000 $ 175,000 $ 175,000