Stock-Based Compensation - Assumptions Used Estimate Fair Value of Employee Stock Purchase Plans (Detail) - $ / shares shares in Thousands	6 Months Ended				12 Months Ended
	Sep. 30, 2022	Mar. 31, 2022	Sep. 30, 2021	Mar. 31, 2021	Dec. 31, 2021
Share-Based Payment Arrangement [Abstract]
Shares purchased for offering period (in shares)	10,901	6,019	5,360	4,668
Fair value per share (in dollars per share)	$ 1.15	$ 1.61	$ 1.90	$ 1.25
Assumptions
Risk-free interest rate (average)	0.86%	0.05%	0.05%	0.12%	0.87%
Expected dividend yield	0.00%	0.00%	0.00%	0.00%	0.00%
Weighted average expected life (years)	6 months	6 months	6 months	6 months	6 years 2 months 12 days
Volatility (average)	32.50%	43.10%	44.60%	47.10%	74.50%