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Fair Value Measurements - Schedule of the fair value measurement of the Group's assets and liabilities (Detail) ¥ in Thousands, $ in Thousands	Dec. 31, 2024 CNY (¥)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 CNY (¥)
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Short-Term Investments	¥ 0		¥ 58,128
Long-Term Investments	114,432	$ 15,677	126,341
Derivative liabilities Conversion feature			100,279
Time Deposits [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Short-Term Investments	0		58,128
Available for Sale Security [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Long-Term Investments	114,432		184,469
Available for Sale Security [Member] | Jiayang Investment [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Long-Term Investments	61,426		63,071
Available for Sale Security [Member] | Tale Base Investment [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Long-Term Investments	29,764		32,176
Available for Sale Security [Member] | Lingdai Investment [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Long-Term Investments	17,981		25,473
Available for Sale Security [Member] | Other Investment [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Long-Term Investments	5,261		5,621
Fair Value, Inputs, Level 1 [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Derivative liabilities Conversion feature			0
Fair Value, Inputs, Level 1 [Member] | Time Deposits [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Short-Term Investments			0
Fair Value, Inputs, Level 1 [Member] | Available for Sale Security [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Long-Term Investments	0		0
Fair Value, Inputs, Level 1 [Member] | Available for Sale Security [Member] | Jiayang Investment [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Long-Term Investments	0		0
Fair Value, Inputs, Level 1 [Member] | Available for Sale Security [Member] | Tale Base Investment [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Long-Term Investments	0		0
Fair Value, Inputs, Level 1 [Member] | Available for Sale Security [Member] | Lingdai Investment [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Long-Term Investments	0		0
Fair Value, Inputs, Level 1 [Member] | Available for Sale Security [Member] | Other Investment [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Long-Term Investments	0		0
Fair Value, Inputs, Level 2 [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Derivative liabilities Conversion feature			0
Fair Value, Inputs, Level 2 [Member] | Time Deposits [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Short-Term Investments			58,128
Fair Value, Inputs, Level 2 [Member] | Available for Sale Security [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Long-Term Investments	0		58,128
Fair Value, Inputs, Level 2 [Member] | Available for Sale Security [Member] | Jiayang Investment [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Long-Term Investments	0		0
Fair Value, Inputs, Level 2 [Member] | Available for Sale Security [Member] | Tale Base Investment [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Long-Term Investments	0		0
Fair Value, Inputs, Level 2 [Member] | Available for Sale Security [Member] | Lingdai Investment [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Long-Term Investments	0		0
Fair Value, Inputs, Level 2 [Member] | Available for Sale Security [Member] | Other Investment [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Long-Term Investments	0		0
Fair Value, Inputs, Level 3 [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Derivative liabilities Conversion feature			100,279
Fair Value, Inputs, Level 3 [Member] | Time Deposits [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Short-Term Investments			0
Fair Value, Inputs, Level 3 [Member] | Available for Sale Security [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Long-Term Investments	114,432		126,341
Fair Value, Inputs, Level 3 [Member] | Available for Sale Security [Member] | Jiayang Investment [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Long-Term Investments	61,426		63,071
Fair Value, Inputs, Level 3 [Member] | Available for Sale Security [Member] | Tale Base Investment [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Long-Term Investments	29,764		32,176
Fair Value, Inputs, Level 3 [Member] | Available for Sale Security [Member] | Lingdai Investment [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Long-Term Investments	17,981		25,473
Fair Value, Inputs, Level 3 [Member] | Available for Sale Security [Member] | Other Investment [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Long-Term Investments	¥ 5,261		¥ 5,621

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- Definition

Fair values as of the balance sheet date of the net amount of all assets and liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments.

+ References

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Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition

The total amount of investments that are intended to be held for an extended period of time (longer than one operating cycle).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-SubTopic 10
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Amount of investments including trading securities, available-for-sale securities, held-to-maturity securities, and short-term investments classified as other and current.

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Fair value assets and liabilities measured on recurring basis.

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