Nature of Business and Summary of Significant Accounting Policies - Additional Information (Detail)	12 Months Ended
	Jun. 30, 2015 USD ($) Segment	Jun. 30, 2014 USD ($) Segment	Jun. 30, 2013 USD ($)
Significant Accounting Policies [Line Items]
Number of reporting segments | Segment	3	5
Accounts receivable factored	$ 17,800,000	$ 12,700,000
Inventory reserve amount	22,300,000	12,000,000
Total carrying value of equity method investment	11,914,000	11,589,000
Pro-rata share of earnings from equity method investment	948,000	698,000	$ 1,048,000
Loss contingency liability	0
Warranty reserve	3,251,000	2,859,000
Allowance for doubtful accounts	$ 1,048,000	1,852,000
Maximum percentage of total revenues represented by distributors and agents that are not granted price protection	10.00%
Maximum percentage of contract related revenues	2.00%
Accumulated foreign currency translation adjustments, net of income taxes	$ 9,500,000	18,000,000
Accumulated pension adjustments, net of income taxes	(800,000)	1,400,000
Reclassification recorded amount	$ 3,800,000
Guangdong Fuxin Electronic Technology
Significant Accounting Policies [Line Items]
Non-controlling minority interest	20.20%
Pro-rata share of earnings from equity method investment	$ 900,000	700,000	1,000,000
Dividends from equity investment	$ 600,000	$ 300,000	$ 500,000
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