Defined Contribution Plan (Details Textual) (USD $) In Millions, unless otherwise specified	12 Months Ended
Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
Defined Contribution Plan (Textual) [Abstract]
Percentage of employee contributions	50.00%
Percentage of employee eligible compensation	6.00%
Contribution expense	$ 0.2	$ 0.3	$ 0.1

Maximum percentage of employee gross pay, by the terms of the plan, that the employer may contribute to a defined contribution plan.

No definition available.

Name:	us-gaap_DefinedContributionPlanMaximumAnnualContributionPerEmployeePercent
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration