Major Customers and Foreign Sales (Details)	12 Months Ended
	Sep. 30, 2012 Customer	Sep. 30, 2011 Customer	Sep. 30, 2010 Customer
Revenue, Major Customer [Line Items]
Revenue, number of major customers	1	2	1
Revenues, percentage	100.00%	100.00%	100.00%
United States [Member]
Revenue, Major Customer [Line Items]
Revenues, percentage	13.00%	6.00%	7.00%
Taiwan [Member]
Revenue, Major Customer [Line Items]
Revenues, percentage	9.00%	16.00%	17.00%
China [Member]
Revenue, Major Customer [Line Items]
Revenues, percentage	43.00%	69.00%	64.00%
Other Asia [Member]
Revenue, Major Customer [Line Items]
Revenues, percentage	14.00%	3.00%	3.00%
Asia [Member]
Revenue, Major Customer [Line Items]
Revenues, percentage	66.00%	88.00%	84.00%
Germany [Member]
Revenue, Major Customer [Line Items]
Revenues, percentage	8.00%	3.00%	3.00%
Other Europe [Member]
Revenue, Major Customer [Line Items]
Revenues, percentage	13.00%	3.00%	6.00%
Europe [Member]
Revenue, Major Customer [Line Items]
Revenues, percentage	21.00%	6.00%	9.00%
Customer Number One [Member]
Revenue, Major Customer [Line Items]
Revenue, major customer, percentage	11.00%
Customer Number Two [Member]
Revenue, Major Customer [Line Items]
Revenue, major customer, percentage		14.00%
Yingli [Member]
Revenue, Major Customer [Line Items]
Revenue, major customer, percentage	7.00%	15.00%	28.00%