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Internal Use Software Development Costs (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Research and Development [Abstract]    
Internal use software development costs, gross $ 45,156 $ 41,882
Accumulated amortization (29,103) (27,312)
Internal use software development costs, net $ 16,053 $ 14,570