Income Taxes - Deferred Tax Assets (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Income Taxes [Abstract]
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Allowance for Doubtful Accounts	$ 675	$ 998
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Accrued Liabilities	6,254	5,646
Deferred Tax Assets, Operating Loss Carryforwards	106,004	103,650
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Other	1,085	1,728
Deferred Tax Assets Investments	292	286
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost	2,757	2,676
Deferred Tax Assets, Capital Loss Carryforwards	3,909	3,889
Deferred Tax Assets Property Plant And Equipment	397
Deferred Tax Assets, Other	1,651	1,836
Deferred Tax Assets, Gross	123,024	120,709
Deferred Tax Assets, Valuation Allowance	(121,962)	(119,738)
Deferred Tax Assets, Net	1,062	971
Deferred Tax Liabilities, Property, Plant and Equipment		0
Deferred Tax Liabilities, Other	(196)	(106)
Deferred Income Tax Liabilities	(196)	(106)
Deferred Tax Assets (Liabilities), Net	$ 866	$ 865