Major Customers and Foreign Sales (Details) - Customer	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Revenue, Major Customer [Line Items]
Revenue, number of major customers	2	2	1
Revenues, percentage	100.00%	100.00%	100.00%
United States
Revenue, Major Customer [Line Items]
Revenues, percentage	24.00%	21.00%	20.00%
Other
Revenue, Major Customer [Line Items]
Revenues, percentage	2.00%	0.00%	0.00%
Total Americas
Revenue, Major Customer [Line Items]
Revenues, percentage	26.00%	21.00%	20.00%
Taiwan
Revenue, Major Customer [Line Items]
Revenues, percentage	13.00%	16.00%	14.00%
China
Revenue, Major Customer [Line Items]
Revenues, percentage	26.00%	14.00%	39.00%
Other
Revenue, Major Customer [Line Items]
Revenues, percentage	8.00%	12.00%	8.00%
Total Asia
Revenue, Major Customer [Line Items]
Revenues, percentage	60.00%	45.00%	64.00%
Germany
Revenue, Major Customer [Line Items]
Revenues, percentage	5.00%	16.00%	5.00%
Other
Revenue, Major Customer [Line Items]
Revenues, percentage	9.00%	18.00%	11.00%
Total Europe
Revenue, Major Customer [Line Items]
Revenues, percentage	14.00%	34.00%	16.00%
Customer Number One
Revenue, Major Customer [Line Items]
Revenue, major customer, percentage	15.00%	18.00%	20.00%
Customer Number Two
Revenue, Major Customer [Line Items]
Revenue, major customer, percentage	11.00%	11.00%