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Major Customers and Foreign Sales (Details)
 12 Months Ended
Sep. 30, 2013
Customer
Sep. 30, 2012
Customer
Sep. 30, 2011
Customer
Revenue, Major Customer [Line Items]      
Revenue, number of major customers 1 1 2
Revenues, percentage 100.00% 100.00% 100.00%
United States
      
Revenue, Major Customer [Line Items]      
Revenues, percentage 20.00% 13.00% 6.00%
Taiwan
      
Revenue, Major Customer [Line Items]      
Revenues, percentage 14.00% 9.00% 16.00%
China
      
Revenue, Major Customer [Line Items]      
Revenues, percentage 39.00% 43.00% 69.00%
Other
      
Revenue, Major Customer [Line Items]      
Revenues, percentage 11.00% 14.00% 3.00%
Total Asia
      
Revenue, Major Customer [Line Items]      
Revenues, percentage 64.00% 66.00% 88.00%
Germany
      
Revenue, Major Customer [Line Items]      
Revenues, percentage 5.00% 8.00% 3.00%
Other
      
Revenue, Major Customer [Line Items]      
Revenues, percentage 11.00% 13.00% 3.00%
Total Europe
      
Revenue, Major Customer [Line Items]      
Revenues, percentage 16.00% 21.00% 6.00%
Customer Number One
      
Revenue, Major Customer [Line Items]      
Revenue, major customer, percentage 20.00% 11.00% 15.00%
Customer Number Two
      
Revenue, Major Customer [Line Items]      
Revenue, major customer, percentage     14.00%
Yingli
      
Revenue, Major Customer [Line Items]      
Revenue, major customer, percentage 20.00% 7.00% 15.00%