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Summary of Significant Accounting Policies - Summary of Capitalized Software Development Costs, Exclusive of those Costs Recorded within Property and Equipment (Detail) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Capitalized Computer Software Net [Abstract]    
Gross capitalized software development costs $ 61,641 $ 46,169
Accumulated amortization (44,848) (33,423)
Capitalized software development costs, net $ 16,793 $ 12,746