Income Taxes (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended			6 Months Ended
	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012	Mar. 31, 2013	Mar. 31, 2012	Sep. 30, 2012
Income Tax Disclosure [Abstract]
Provision for income taxes	$ (6)		$ 27	$ 3	$ 65
Potential cash payments related to cash exposures						200
Tax liability for uncertain tax postions	6	6	6		12
Benefit for uncertain tax position	$ 2			$ 4