Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies (Intangibles) (Details)

v3.5.0.2
Summary of Significant Accounting Policies (Intangibles) (Details) - USD ($)
$ in Thousands
12 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2014
Jan. 30, 2015
Dec. 24, 2014
Acquired Finite and Indefinite-Lived Intangible Assets [Line Items]          
Amortization of intangible assets $ 800 $ 1,200 $ 700    
Amortization in fiscal year 2017 700        
Amortization in fiscal year 2018 600        
Amortization in fiscal year 2019 600        
Amortization in fiscal year 2020 600        
Amortization in fiscal year 2021 400        
Gross Carrying Amount 7,378 7,391      
Accumulated Amortization (3,278) (2,452)      
Net Carrying Amount $ 4,100 4,939      
Customer lists          
Acquired Finite and Indefinite-Lived Intangible Assets [Line Items]          
Useful Life (in years) 10 years        
Gross Carrying Amount $ 2,432 2,434      
Accumulated Amortization (1,164) (808)      
Net Carrying Amount $ 1,268 1,626      
Customer lists | Minimum          
Acquired Finite and Indefinite-Lived Intangible Assets [Line Items]          
Useful Life (in years) 6 years        
Technology          
Acquired Finite and Indefinite-Lived Intangible Assets [Line Items]          
Gross Carrying Amount $ 3,214 3,223      
Accumulated Amortization (1,678) (1,368)      
Net Carrying Amount $ 1,536 1,855      
Technology | Minimum          
Acquired Finite and Indefinite-Lived Intangible Assets [Line Items]          
Useful Life (in years) 5 years        
Technology | Maximum          
Acquired Finite and Indefinite-Lived Intangible Assets [Line Items]          
Useful Life (in years) 10 years        
Trade names          
Acquired Finite and Indefinite-Lived Intangible Assets [Line Items]          
Gross Carrying Amount $ 1,455 1,456      
Accumulated Amortization (219) (72)      
Net Carrying Amount $ 1,236 1,384      
Trade names | Minimum          
Acquired Finite and Indefinite-Lived Intangible Assets [Line Items]          
Useful Life (in years) 10 years        
Trade names | Maximum          
Acquired Finite and Indefinite-Lived Intangible Assets [Line Items]          
Useful Life (in years) 15 years        
Other          
Acquired Finite and Indefinite-Lived Intangible Assets [Line Items]          
Gross Carrying Amount $ 277 278      
Accumulated Amortization (217) (204)      
Net Carrying Amount $ 60 74      
Other | Minimum          
Acquired Finite and Indefinite-Lived Intangible Assets [Line Items]          
Useful Life (in years) 2 years        
Other | Maximum          
Acquired Finite and Indefinite-Lived Intangible Assets [Line Items]          
Useful Life (in years) 10 years        
SoLayTec, B.V.          
Acquired Finite and Indefinite-Lived Intangible Assets [Line Items]          
Percentage of voting interests acquired         51.00%
Finite-lived intangibles acquired         $ 2,000
SoLayTec, B.V. | Technology          
Acquired Finite and Indefinite-Lived Intangible Assets [Line Items]          
Finite-lived intangibles acquired         1,800
SoLayTec, B.V. | Trade names          
Acquired Finite and Indefinite-Lived Intangible Assets [Line Items]          
Finite-lived intangibles acquired         $ 200
BTU International, Inc (BTU)          
Acquired Finite and Indefinite-Lived Intangible Assets [Line Items]          
Finite-lived intangibles acquired       $ 2,900  
BTU International, Inc (BTU) | Customer lists          
Acquired Finite and Indefinite-Lived Intangible Assets [Line Items]          
Finite-lived intangibles acquired       1,700  
BTU International, Inc (BTU) | Trade names          
Acquired Finite and Indefinite-Lived Intangible Assets [Line Items]          
Finite-lived intangibles acquired       $ 1,200  
Kingstone          
Acquired Finite and Indefinite-Lived Intangible Assets [Line Items]          
Intangible assets derecognized   3,200      
Accumulated amortization derecognized   $ 1,900