Stock-Based Compensation - Additional Information (Detail) $ / shares in Units, $ in Millions		1 Months Ended						12 Months Ended
		Jun. 30, 2024 shares	Jun. 30, 2023 shares	Jun. 30, 2022 shares	Jun. 30, 2021 shares	Jun. 30, 2020 shares	Jun. 30, 2019 shares	Dec. 31, 2024 USD ($) Period $ / shares shares	Dec. 31, 2023 USD ($) $ / shares shares	Dec. 31, 2022 USD ($) $ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options exercised								0	0
Total intrinsic value of options exercised | $										$ 1.1
Stock-based compensation, expected dividend yield								0.00%
Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense expected to be recognized | $								$ 1.4
Stock-based compensation, weighted average recognition period								1 year
Stock-based compensation, expected dividend yield								0.00%		0.00%
Stock options granted								0	0
Weighted average grant-date fair value of stock options granted | $ / shares										$ 3.12
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense expected to be recognized | $								$ 19.5
Stock-based compensation, weighted average recognition period								1 year 3 months 18 days
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation, option to be granted at percentage of fair value of common stock								85.00%
Employee Stock Purchase Plan, offering period								12 months
Number of purchase periods within each offering period | Period								2
Increase in shares of common stock authorized for issuance		2,000,000				1,500,000
Aggregate number of shares of common stock reserved for future issuance								2,300,000
Stock-based compensation, expected dividend yield								0.00%	0.00%	0.00%
Weighted average grant-date fair value of awards granted | $ / shares								$ 0.92	$ 0.88	$ 1.63
2008 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation, option to be granted at percentage of fair value of common stock								100.00%
Increase in shares of common stock authorized for issuance			7,000,000	12,000,000	7,600,000	5,000,000	11,800,000
Stock-based compensation, award term								10 years
Performance-based stock options, outstanding								2,600,000
Number of additional awards granted								0
Outstanding options and other stock based awards								12,297,000	14,515,000
Stock options exercised								0
Stock options granted								0
2008 Equity Incentive Plan | Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation, vesting period								4 years
2008 Equity Incentive Plan | Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of unvested Restricted Stock Units								13,661,000	10,686,000
Total fair value | $								$ 8.4	$ 8.7	$ 15.0
Weighted average grant-date fair value of awards granted | $ / shares	[1]							$ 2.14
2008 Equity Incentive Plan | Performance-based Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee Stock Purchase Plan, authorized shares for issuance								500,000
2008 Equity Incentive Plan | Performance-based Cash Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option plan granted on cash award | $								$ 1.0
2008 Equity Incentive Plan | Minimum | Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation, vesting period								3 years
2008 Equity Incentive Plan | Maximum | Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation, vesting period								4 years
2024 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation, option to be granted at percentage of fair value of common stock								100.00%
Aggregate number of shares of common stock reserved for future issuance								26,000,000
Stock-based compensation, award term								10 years
Number of additional shares available for grant and issurance								5,000,000
Outstanding options and other stock based awards								12,300,000
Number of shares available for future issuance								12,700,000
2024 Equity Incentive Plan | Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation, vesting period								4 years
2024 Equity Incentive Plan | Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of unvested Restricted Stock Units								13,700,000
2024 Equity Incentive Plan | Minimum | Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation, vesting period								3 years

[1] Includes shares issuable under performance-based restricted stock unit awards.