Nature of Business and Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($)	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Significant Accounting Policies [Line Items]
Accounts receivable factored	$ 23,100,000	$ 20,500,000
Inventory reserve amount	$ 18,500,000	17,700,000
Property, plant and equipment estimated useful lives, years	15 years
Total carrying value of equity method investment	$ 11,700,000	11,400,000
Pro-rata share of earnings from equity method investment	744,000	29,000	$ 948,000
Loss contingency liability	$ 0
Maximum percentage of total revenues represented by distributors and agents that are not granted price protection	10.00%
Maximum percentage of contract related revenues	1.00%
Accumulated foreign currency translation adjustments, net of income taxes	$ (8,400,000)	(6,200,000)
Accumulated pension adjustments, net of income taxes	$ (5,400,000)	(7,800,000)
ASU 2015-03
Significant Accounting Policies [Line Items]
Reclassification as unamortized debt issuance costs		600,000
ASU 2014-09 | Military Related Contracts | Consolidated Revenues | Product Concentration Risk
Significant Accounting Policies [Line Items]
Percentage of consolidated revenues	10.00%
Guangdong Fuxin Electronic Technology
Significant Accounting Policies [Line Items]
Non-controlling minority interest	20.20%
Pro-rata share of earnings from equity method investment	$ 700,000	100,000	900,000
Dividends from equity investment	$ 400,000	$ 600,000	$ 600,000
Minimum
Significant Accounting Policies [Line Items]
Finite-lived intangible assets useful life, years	5 years
Maximum
Significant Accounting Policies [Line Items]
Finite-lived intangible assets useful life, years	20 years
Building improvements and land improvements | Minimum
Significant Accounting Policies [Line Items]
Property, plant and equipment estimated useful lives, years	10 years
Building improvements and land improvements | Maximum
Significant Accounting Policies [Line Items]
Property, plant and equipment estimated useful lives, years	20 years
Machinery and Equipment | Minimum
Significant Accounting Policies [Line Items]
Property, plant and equipment estimated useful lives, years	3 years
Machinery and Equipment | Maximum
Significant Accounting Policies [Line Items]
Property, plant and equipment estimated useful lives, years	20 years