Schedule of Income Tax Expense (Benefit) on Continuing Operations (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Aug. 31, 2012	Aug. 31, 2011	Aug. 31, 2010
Current:
Federal	$ (162)	$ 34	$ (332)
State	3	137	208
Current Income Tax Expense (Benefit), Total	(159)	171	(124)
Deferred:
Federal	4,582	9	(4,447)
State	383	133	(131)
Deferred income tax expense (benefit)	4,965	142	(4,578)
Total	$ 4,806	$ 313	$ (4,702)