Income Taxes (Schedule Of Net Deferred Tax Assets) (Details) (USD $)	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
Income Taxes [Abstract]
Prepaid expenses	$ (47,000)	$ (91,000)	$ (37,000)
Acquired intangibles		(40,000)	(43,000)
Deferred tax liabilities	(47,000)	(131,000)	(80,000)
Net operating loss carryforwards	5,493,000	5,146,000	4,793,000
Research and development credits	778,000	624,000	571,000
Alternative minimum tax credits	154,000	164,000	164,000
Accounts and notes receivable reserves	105,000	27,000	48,000
Depreciation and amortization	1,446,000	1,241,000	1,412,000
Deferred rent			21,000
Other	(300,000)	165,000	122,000
Deferred tax assets	7,676,000	7,367,000	7,131,000
Total	7,629,000	7,236,000	7,051,000
Valuation allowance	(7,629,000)	(7,236,000)	(7,051,000)
Deferred tax liability, net