Other Investments - Additional Information (Detail) - USD ($)	1 Months Ended	3 Months Ended		9 Months Ended
	Nov. 30, 2017	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018	Sep. 30, 2018	Jun. 30, 2018
Schedule Of Equity Method Investments [Line Items]
Equity interest, percentage	93.80%	93.80%		93.80%
Aggregate cost of equity method investments	$ 51,500,000
Working capital adjustment relating to acquisition	200,000
Pro-rata share of earnings from equity method investment				$ 2,778,000	$ 2,607,000
Voting interest				25.00%
Equity Investment		$ 76,452,000		$ 76,452,000			$ 69,215,000
Purchase price description of minority interest under equity method				The purchase price is equal to the greater of: (a) (i) the product of the aggregate trailing 12-month revenues of the equity investment preceding the date of purchase, multiplied by (ii) a factor of 2.9 multiplied by (iii) a factor of 0.723, multiplied by (iv) the percentage interest owned by each minority equity holder and (b) $966,666.
Minimum purchase price consideration of remaining minority interest under equity method		966,666		$ 966,666
Interest percentage in investment, accounted under cost method						10.00%
Investment accounted under cost method						$ 4,500,000
Other Long-term Liabilities | ASC 815-10, Derivatives and Hedging
Schedule Of Equity Method Investments [Line Items]
Equity method Investment, noncurrent liabilities	$ 2,200,000
Equity Investment
Schedule Of Equity Method Investments [Line Items]
Equity Investment		58,200,000		58,200,000			56,300,000
Privately-held Company
Schedule Of Equity Method Investments [Line Items]
Pro-rata share of earnings from equity method investment		$ (200,000)	$ 800,000	$ 1,800,000	2,000,000
Guangdong Fuxin Electronic Technology
Schedule Of Equity Method Investments [Line Items]
Equity interest, percentage		20.20%		20.20%
Pro-rata share of earnings from equity method investment		$ 200,000	$ 200,000	$ 900,000	$ 500,000
Total carrying value of equity method investment		$ 13,800,000		$ 13,800,000			$ 12,900,000