Trade Accounts Receivable (Narrative) (Details) (USD $)	12 Months Ended
Aug. 31, 2012
Trade Accounts Receivable [Abstract]
Recoveries of previously written off accounts	$ 72,000

Amount of recoveries of receivables doubtful of collection that were previously charged off.

No definition available.

Name:	us-gaap_AllowanceForDoubtfulAccountsReceivableRecoveries
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration