Segment Reporting - Percentage of Revenue by Geographic Area (Detail)	3 Months Ended
	Mar. 31, 2025	Sep. 30, 2023
Concentration Risk [Line Items]
Concentration Risk, Percentage	100.00%	100.00%
Total Revenue | Geographic Concentration Risk [Member] | North America [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	50.00%	49.00%
Total Revenue | Geographic Concentration Risk [Member] | Europe [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	35.00%	34.00%
Total Revenue | Geographic Concentration Risk [Member] | APAC Other [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	15.00%	17.00%