Income Taxes (Schedule of Deferred Tax Assets and Liabilities) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Deferred tax assets:
Depreciation	$ 217	$ 215
Inventory and other valuation reserves	532	1,136
Accrued expenses	5,312	6,255
Federal, state and foreign credit carryforwards	4,310	7,695
Federal, state and foreign net operating loss carryforwards	20,388	27,041
Non-deductible stock options	3,064	2,714
Other, net	38	2,444
Subtotal	33,861	47,500
Valuation allowance	(24,928)	(24,887)
Total deferred tax assets	8,933	22,613
Deferred tax liabilities:
Purchased intangibles	(1,144)	(1,500)
Net deferred tax assets	7,789	21,113
Reported as:
Current deferred tax assets	2,326	8,940
Non-current deferred tax assets	9,942	13,588
Non-current deferred tax liabilities	$ (4,479)	$ (1,415)