Stock Based Compensation - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	1 Months Ended		12 Months Ended		12 Months Ended								12 Months Ended			1 Months Ended	12 Months Ended
	Oct. 21, 2011 2005 Stock Incentive Plan	Jun. 30, 2012 2005 Stock Incentive Plan	Jun. 30, 2012 2005 Stock Incentive Plan Maximum	Jun. 30, 2012 Stock Option Plan 1997	Jun. 30, 2012 Stock Option Plan 1997 Maximum	Jun. 30, 2012 Stock Option Plan 1997 Minimum	Jun. 30, 2012 Restricted Stock	Jun. 30, 2011 Restricted Stock	Jun. 30, 2010 Restricted Stock	Jan. 31, 2011 Restricted Stock LNX	Dec. 31, 2011 Restricted Stock KOR Electronics	Jun. 30, 2012 Restricted Stock Stock Option Plan 1997	Jun. 30, 2012 Stock Options	Jun. 30, 2011 Stock Options	Jun. 30, 2010 Stock Options	Oct. 21, 2011 1997 Employee Stock Purchase Plan	Jun. 30, 2012 1997 Employee Stock Purchase Plan	Jun. 30, 2011 1997 Employee Stock Purchase Plan	Jun. 30, 2010 1997 Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized for issuance under stock incentive plan		6,092		8,650								100					1,400
Increase in share authorized under stock incentive plan	1,000															300
Exercise price of stock option, percentage		100.00%		100.00%
Term of stock option			7 years		10 years
Shares available for future grant		2,675															360
Options, vesting period					4 years	0 years
Purchase price as a percentage of the lesser of the market value of such shares at either the beginning or the end of each nine-month offering period																	85.00%
Percentage of employee compensation that may be uses to purchase common stock through payroll deductions, maximum																	10.00%
Number of share options granted														77			104	89	94
Intrinsic value of the options exercised													$ 534	$ 2,979	$ 532
Unrecognized compensation cost related to non-vested options granted													110	1,218
Unrecognized compensation, period of recognition							2 years 4 months 24 days	2 years 7 months 6 days					3 months 18 days	10 months 24 days
Restricted stock granted							585	738		79	144
Total fair value of restricted stock awards vested							5,848	4,175	3,485
Unrecognized compensation cost related to non-vested restricted stock							$ 10,515	$ 10,400