Income Taxes (Narrative) (Details) (USD $)	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2009
Income Taxes [Line Items]
Alternative minimum tax credits	$ 154,000	$ 164,000	$ 164,000
Research and development credits	778,000	624,000	571,000
Period of tax losses	3 years
Federal statutory tax rate	34.00%	34.00%
Cumulative tax liability	200,000			125,000
Increase in tax liability	25,000	25,000	25,000
Benefit for uncertain tax position	9,000	2,000	9,000
Gross unrecognized tax benefits	866,000	850,000	826,000
Deferred tax liability, net
Federal [Member]
Income Taxes [Line Items]
Tax loss carryforward	6,900,000
State [Member]
Income Taxes [Line Items]
Tax loss carryforward	1,700,000
United Kingdom [Member]
Income Taxes [Line Items]
Tax loss carryforward	7,400,000
Australia [Member]
Income Taxes [Line Items]
Tax loss carryforward	3,700,000
Germany [Member]
Income Taxes [Line Items]
Tax loss carryforward	691,000
Mergence [Member]
Income Taxes [Line Items]
Tax loss carryforward	$ 182,000