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Deconsolidation (Details) - USD ($)
$ in Thousands
12 Months Ended
Sep. 30, 2015
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2013
Sep. 16, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Proceeds from partial sale of subsidiary   $ 700 $ 0 $ 0  
Gain on deconsolidation of Kingstone   8,814 $ 0 $ 0  
Kingstone          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Proceeds from partial sale of subsidiary $ 700        
Deconsolidation, amount to be received 7,100 7,100      
Gain on deconsolidation of Kingstone   8,800      
Sale of Shares | Kingstone          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Deconsolidation, amount to be received 3,600 3,600      
Repayment of Loan | Kingstone          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Deconsolidation, amount to be received 3,500 3,500      
Exclusive Sales and Service Rights in Solar Ion Implant Equipment | Kingstone          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Deconsolidation, amount to be received 5,600 5,600      
Deconsolidation, amount to be received, net of tax (by March 31, 2016) $ 3,100 $ 3,100      
Kingstone Holding Company | Kingstone          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Ownership percentage         15.00%
Shanghai Operating Entity | Kingstone          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Ownership percentage         10.00%
Loan | Kingstone          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Interest rate 1.00% 1.00%