Goodwill and Other Intangible Assets - Schedule of Other Intangible Assets by Major Asset Class (Detail) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Customer Related Intangible Assets [Member]
Intangible Assets Other Than Goodwill [Line Item]
Amortizable Intangible Assets, Gross carrying amount		$ 550
Amortizable Intangible Assets, Accumulated amortization		(321)
Amortizable Intangible Assets, Net		229
Domain Names [Member]
Intangible Assets Other Than Goodwill [Line Item]
Unamortized Intangible Assets	$ 571	$ 571