Fair Value Measurements (Details) (Money Market Funds [Member], USD $) In Thousands	Jun. 30, 2011	Sep. 30, 2010
Level 1 [Member]
Fair Value Measurements (Textuals) [Abstract]
Money market funds	$ 0	$ 10,249
Level 2 [Member]
Fair Value Measurements (Textuals) [Abstract]
Money market funds	0	0
Level 3 [Member]
Fair Value Measurements (Textuals) [Abstract]
Money market funds	$ 0	$ 0

This element represents a certain statement of financial position asset caption which represents a class of assets, or which may include an individual asset, measured at fair value on a recurring basis.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 157
-Paragraph 32
-Subparagraph a

Name:	us-gaap_FairValueAssetsMeasuredOnRecurringBasisCashAndCashEquivalents
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant