Nature of Business and Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Significant Accounting Policies [Line Items]
Accounts receivable factored	$ 12,700,000	$ 8,500,000
Inventory reserve amount	12,000,000	7,100,000
Total carrying value of equity method investment	11,589,000	11,203,000
Pro-rata share of loss from equity method investment	698,000	1,048,000	1,059,000
Loss contingency liability	0
Allowance for doubtful accounts	1,852,000	1,479,000
Allowance for warranty reserve	2,859,000	1,661,000
Maximum percentage of total revenues represented by distributors and agents that are not granted price protection	10.00%
Maximum percentage of contract related revenues	5.00%
Accumulated foreign currency translation adjustments, net of income taxes	18,000,000	15,600,000
Accumulated pension adjustments, net of income taxes	1,400,000
Guangdong Fuxin Electronic Technology
Significant Accounting Policies [Line Items]
Non-controlling minority interest	20.20%
Pro-rata share of loss from equity method investment	700,000	1,000,000	1,300,000
Dividends from equity investment	$ 300,000	$ 500,000
Minimum
Significant Accounting Policies [Line Items]
Finite-lived intangible assets useful life, years	7 years
Maximum
Significant Accounting Policies [Line Items]
Finite-lived intangible assets useful life, years	18 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	12 years