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Share-Based Payments (Details) - Share-based Payment Arrangement, Expensed and Capitalized, Amount - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Abstract]        
Share-based compensation expense $ 615 $ 540 $ 1,380 $ 1,506