Nature Of Business And Summary Of Significant Accounting Policies (Narrative) (Detail) (USD $)	12 Months Ended					12 Months Ended				1 Months Ended		12 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2009	Jun. 30, 2012 China	Jun. 30, 2012 Cost Of Goods Sold	Jun. 30, 2012 Selling General And Administrative Expense	Jun. 30, 2012 Doubtful Accounts	Jun. 30, 2012 Warranty Reserve	Mar. 31, 2012 Langfang Haobo Diamond Co., Ltd.	Jul. 31, 2009 Langfang Haobo Diamond Co., Ltd.	Jun. 30, 2012 Guangdong Fuxin Electronic Technology	Jun. 30, 2011 Guangdong Fuxin Electronic Technology	Jun. 30, 2010 Guangdong Fuxin Electronic Technology	Jun. 30, 2012 Minimum	Jun. 30, 2012 Maximum	Jun. 30, 2012 Machinery and Equipment Minimum	Jun. 30, 2012 Machinery and Equipment Maximum	Jun. 30, 2012 Building Improvements and Land Improvements Minimum	Jun. 30, 2012 Building Improvements and Land Improvements Maximum
Significant Accounting Policies [Line Items]
Restricted cash					$ 4,000,000
Accounts receivable factored	12,300,000	8,200,000
Percentage of accounts receivable	12.00%
Inventory reserve amount	6,100,000	5,400,000
Property, plant and equipment estimated useful lives, years																	P3Y	P12Y	P10Y	P20Y
Non-controlling minority interest											40.00%	20.20%
Non-controlling minority interest sold										40.00%
Cash received from sale of equity investments										5,500,000
Proceeds from sale of equity investments	3,478,000									3,500,000
Notes receivable from sale of equity equity investment	2,022,000									2,000,000
Gain on sale of equity investment										1,000,000
Total carrying value of equity method investment	10,661,000	15,458,000										10,700,000	10,100,000
Pro-rata share of loss from equity method investment	1,059,000	579,000	375,000									1,300,000	900,000	700,000
Dividends from equity investment												500,000	400,000
Finite-lived intangible assets useful life, years															7 years	18 years
Minimum likelihood of realization of tax benefits upon ultimate resolution	50.00%
Allowance for doubtful accounts								1,500,000
Allowance for warranty reserve	1,247,000	1,187,000	1,037,000	861,000					1,200,000
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%
Share-based compensation expense	11,584,000	9,972,000	8,790,000
Share-based compensation expense allocated						20.00%	80.00%
Weighted-average fair value of options granted under the stock option plan	$ 9.32	$ 8.45	$ 6.64
Option pre-vesting cancellations estimated rate	16.00%
Accumulated foreign currency translation adjustments, net of income taxes	$ 10,200,000	$ 13,100,000