Summary of Stock Option Plans (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended		12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2011	Dec. 31, 2012 Stock Options	Jun. 30, 2012 Stock Options	Jun. 30, 2011 Stock Options
Number of Shares
Outstanding at beginning of period				2,185	2,293
Granted				271
Exercised				(40)	(72)
Cancelled				(232)	(36)
Outstanding at end of period				2,184	2,185	2,293
Weighted Average Exercise Price
Outstanding at beginning of period				$ 14.46	$ 14.35
Granted				$ 4.75
Exercised				$ 6.65	$ 6.48
Cancelled				$ 15.98	$ 23.70
Outstanding at end of period				$ 13.23	$ 14.46	$ 14.35
Weighted Average Remaining Contractual Term (Years)
Outstanding at end of period				3 years 15 days	2 years 10 months 21 days	3 years 10 months 17 days