Equity-based Awards - Summary of Information Regarding Restricted Stock Unit Awards (Detail) - Legacy Amplify Management Incentive Plan [Member] - $ / shares		12 Months Ended
		Dec. 31, 2022		Dec. 31, 2021
TSUs [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Outstanding, Number of Units, Beginning Balance		1,074,420		115,797
Granted, Number of Units		963,027	[1]	1,083,644	[2]
Forfeited, Number of Units		(52,485)		(52,601)
Vested, Number of Units		(482,406)		(72,420)
Outstanding, Number of Units, Ending Balance		1,502,556		1,074,420
Outstanding, Weighted-Average Grant Date Fair Value per unit, Beginning balance	[3]	$ 3.66		$ 4.47
Granted, Weighted-Average Grant Date Fair Value per Unit	[3]	4.05	[1]	3.65	[2]
Forfeited, Weighted-Average Grant Date Fair Value per Unit	[3]	4.30		3.73
Vested, Weighted-Average Grant Date Fair Value per Unit	[3]	3.85		4.74
Outstanding, Weighted-Average Grant Date Fair Value per unit, Ending balance	[3]	$ 3.82		$ 3.66
PSUs [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Outstanding, Number of Units, Beginning Balance		65,940		214,554
Granted, Number of Units		0		0
Forfeited, Number of Units		(22,614)		(148,614)
Vested, Number of Units		0		0
Outstanding, Number of Units, Ending Balance		43,326		65,940
Outstanding, Weighted-Average Grant Date Fair Value per unit, Beginning balance	[3]	$ 2.87		$ 2.36
Granted, Weighted-Average Grant Date Fair Value per Unit	[3]	0		0
Forfeited, Weighted-Average Grant Date Fair Value per Unit	[3]	2.57		2.13
Vested, Weighted-Average Grant Date Fair Value per Unit	[3]	0		0
Outstanding, Weighted-Average Grant Date Fair Value per unit, Ending balance	[3]	$ 3.03		$ 2.87
PRSU [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Outstanding, Number of Units, Beginning Balance		196,377
Granted, Number of Units		189,904		196,377
Vested, Number of Units		(49,095)
Outstanding, Number of Units, Ending Balance		337,186		196,377
Outstanding, Weighted-Average Grant Date Fair Value per unit, Beginning balance		$ 1.94
Granted, Weighted-Average Grant Date Fair Value per Unit		6.20		$ 1.94
Vested, Weighted-Average Grant Date Fair Value per Unit		1.24
Outstanding, Weighted-Average Grant Date Fair Value per unit, Ending balance		$ 4.44		$ 1.94

[1] The aggregate grant date fair value of TSUs issued for the year ended December 31, 2022 was $3.9 million based on a grant date market price ranging from $3.64 to $6.99 per share.

[2] The aggregate grant date fair value of TSUs issued for the year ended December 31, 2021 was $4.0 million based on a grant date market price ranging from $3.52 to $4.66 per share.

[3] Determined by dividing the aggregate grant date fair value of awards by the number of awards issued.