Stockholders' Equity - Common Shares Outstanding (Detail)	12 Months Ended
	Aug. 31, 2013	Aug. 31, 2012	Aug. 31, 2011
Statement Of Stockholders Equity [Abstract]
Balance, beginning of year	14,280,718	13,243,385	13,189,581
Series B preferred stock converted to common shares		1,000,000
Exercise of stock options	121,226
Issuance of restricted stock, net	52,237	37,333	53,804
Balance, end of year	14,454,181	14,280,718	13,243,385