Organization and Principal Activities - Schedule of Amounts and Balances of VIEs Included in Consolidated Financial Statements After Elimination of Intercompany Balances and Transactions (Parenthetical) (Detail) - CNY (¥) ¥ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Variable Interest Entity [Line Items]
Allowance for doubtful accounts	¥ 12,209	¥ 0
Beijing Momo Technology Co., Ltd. [Member]
Variable Interest Entity [Line Items]
Allowance for doubtful accounts	¥ 12,209	¥ 0