Revenue Recognition - Schedule of Information about Receivables, Contract Assets and Contract Liabilities from Contracts with Customers (Detail) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Revenue From Contract With Customer [Abstract]
Receivables	$ 9,216	$ 11,581
Short-term contract assets	494	1,053
Long-term contract assets	237	528
Short-term contract liabilities (deferred revenue)	1,559	1,652
Long-term contract liabilities (deferred revenue)	$ 903	$ 1,037