Income Taxes (Schedule of Deferred Tax Assets and Liabilities) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Sep. 30, 2011
Deferred tax assets:
Depreciation	$ 215	$ 87
Inventory and other valuation reserves	1,136	788
Accrued expenses	6,255	2,608
Federal, state and foreign credit carryforwards	7,695	11,143
Federal, state and foreign net operating loss carryforwards	27,041	31,466
Non-deductible stock options	2,714	2,850
Other, net	2,444	2,484
Subtotal	47,500	51,426
Valuation allowance	(24,887)	(22,228)
Total deferred tax assets	22,613	29,198
Deferred tax liabilities:
Purchased intangibles	(1,500)	(1,649)
Net deferred tax assets	21,113	27,549
Reported as:
Current deferred tax assets	8,940	10,044
Non-current deferred tax assets	13,588	19,028
Non-current deferred tax liabilities	$ (1,415)	$ (1,523)