Stock Based Compensation - Additional Information (Detail) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended			1 Months Ended		6 Months Ended		6 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2011	Dec. 31, 2012 1997 Employee Stock Purchase Plan	Dec. 31, 2011 1997 Employee Stock Purchase Plan	Oct. 17, 2012 2005 Stock Incentive Plan	Dec. 31, 2012 2005 Stock Incentive Plan	Dec. 31, 2012 2005 Stock Incentive Plan Maximum	Dec. 31, 2012 Stock Option Plan 1997	Dec. 31, 2012 Stock Option Plan 1997 Maximum	Dec. 31, 2012 Stock Option Plan 1997 Minimum	Dec. 31, 2012 Stock Option Plan 1997 Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized for issuance under stock incentive plan				1,400		7,592	7,764		8,650			100
Exercise price of stock option, percentage							100.00%		100.00%
Term of stock option								7 years		10 years
Shares available for future grant				307			2,223
Increase in share authorized under stock incentive plan						1,500
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				52	58