Acquisition - Additional Information (Detail) - USD ($)		1 Months Ended	9 Months Ended
	Apr. 01, 2020	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Business Acquisition [Line Items]
Businesses acquisition, net of cash acquired				$ 92,000,000
Assumed debt repaid			$ 167,000,000	$ 334,000,000
Shenzhen Sanshun Nano New Materials Co., Ltd [Member]
Business Acquisition [Line Items]
Business acquisition, purchase price	$ 100,000,000
Business acquisition, cash consideration	84,000,000
Businesses acquisition, net of cash acquired	1,000,000
Business acquisition, assumed debt	13,000,000
Assumed debt repaid		$ 13,000,000
Shenzhen Sanshun Nano New Materials Co., Ltd [Member] | Maximum [Member]
Business Acquisition [Line Items]
Business combination future contingent consideration milestone payment	$ 3,000,000