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The Company and Significant Accounting Policies - Stock-Based Compensation - Additional Information (Detail) $ / shares in Units, $ in Millions	1 Months Ended	3 Months Ended		9 Months Ended
	Jan. 31, 2025 USD ($) Days $ / shares	Sep. 30, 2025 USD ($) $ / shares shares	Sep. 30, 2024 USD ($)	Sep. 30, 2025 USD ($) $ / shares shares	Sep. 30, 2024 USD ($)
Restricted Stock Units
Accounting Policies [Line Items]
Share-based compensation expenses | $		$ 2.3	$ 3.3	$ 6.6	$ 11.7
Total unrecognized compensation expense related to grants of restricted stock units | $		7.6		$ 7.6
Weighted average period for unrecognized compensation expense related to grants of restricted stock units				1 year 7 months 6 days
Performance Stock Units
Accounting Policies [Line Items]
Share-based compensation expenses | $		0.5	$ 0.4	$ 1.5	$ 1.3
Total unrecognized compensation expense related to grants of restricted stock units | $		$ 2.4		$ 2.4
Weighted average period for unrecognized compensation expense related to grants of restricted stock units				2 years 1 month 6 days
Share price		$ 2.28		$ 2.28
Number of consecutive trading days | Days	30
Performance period commencing date	Jan. 21, 2025
Performance period ending date	Jan. 21, 2030
Weighted Average Fair Value				$ 1.88
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares) | shares		1,390,000		1,390,000
Allocated percentage				25.00%
Percentage of performance measurement				100.00%
Performance Stock Units | Tranche One
Accounting Policies [Line Items]
Share price	$ 3
Fair value of each of the Tranches | $	$ 0.7
Weighted Average Fair Value	$ 2.11
Performance Stock Units | Tranche Two
Accounting Policies [Line Items]
Share price	$ 4
Fair value of each of the Tranches | $	$ 0.7
Weighted Average Fair Value	$ 1.95
Performance Stock Units | Tranche Three
Accounting Policies [Line Items]
Share price	$ 5
Fair value of each of the Tranches | $	$ 0.6
Weighted Average Fair Value	$ 1.8
Performance Stock Units | Tranche Four
Accounting Policies [Line Items]
Share price	$ 6
Fair value of each of the Tranches | $	$ 0.6
Weighted Average Fair Value	$ 1.67
Minimum | Restricted Stock Units
Accounting Policies [Line Items]
Vesting period				1 year
Minimum | Performance Stock Units
Accounting Policies [Line Items]
Vesting percentage	0.00%
Maximum | Restricted Stock Units
Accounting Policies [Line Items]
Vesting period				4 years
Maximum | Performance Stock Units
Accounting Policies [Line Items]
Vesting percentage	100.00%

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