Income Taxes (Details 2) (USD $)	Sep. 30, 2012	Sep. 30, 2011
Summary of Deferred Tax Asset
Net operating loss carryforwards	$ 20,350,000	$ 20,928,000
Research and development credit	2,206,000	2,094,000
Share-based compensation	600,000	1,761,000
Equipment		90,000
Patents	229,000	252,000
Accruals and other	509,000	490,000
State tax deduction	(2,000)	4,000
Federal AMT Credit	49,000	155,000
Allowances	184,000	213,000
Gross deferred tax asset	24,125,000	25,987,000
Less valuation allowance	(24,125,000)	(25,987,000)
Deferred tax assets, Net