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Debt (Details)
€ in Thousands, $ in Thousands
3 Months Ended
Dec. 31, 2016
USD ($)
Dec. 31, 2016
EUR (€)
Sep. 30, 2016
USD ($)
Annual principal payments on long term debt [Abstract]      
Total $ 14,584   $ 15,512
Banca Monte dei Paschi di Siena S.p.A. ("MPS") [Member] | Secured Revolving Credit Facility [Member]      
Line of Credit Facility [Line Items]      
Line of credit facility, maximum borrowing capacity $ 14,778 € 14,000  
Line of credit facility, expiration date Jan. 27, 2021    
Line of credit facility, interest rate 3.00% 3.00%  
Line of credit facility, amount outstanding $ 14,778 € 14,000  
Euros per dollar exchange rate 1.0553 1.0553  
Annual principal payments on long term debt [Abstract]      
2018 $ 1,108    
2019 1,477    
2020 1,477    
2021 10,716    
Total 14,778    
Less: debt issuance costs (194)    
Total $ 14,584    
Banca Monte dei Paschi di Siena S.p.A. ("MPS") [Member] | Secured Revolving Credit Facility [Member] | Maximum [Member]      
Line of Credit Facility [Line Items]      
Ratio of net debt to EBITDA, Current fiscal year 3.5    
Ratio of net debt to EBITDA, year two 3.5    
Ratio of net debt to EBITDA, thereafter 3.0    
Banca Monte dei Paschi di Siena S.p.A. ("MPS") [Member] | Secured Revolving Credit Facility [Member] | Controls and Capacitor [Member] | United Kingdom [Member]      
Line of Credit Facility [Line Items]      
Line of credit facility, maximum borrowing capacity $ 1,100    
Banca Monte dei Paschi di Siena S.p.A. ("MPS") [Member] | Secured Revolving Credit Facility [Member] | EuroLIBOR [Member]      
Line of Credit Facility [Line Items]      
Margin interest rate 3.00%    
Banca Monte dei Paschi di Siena S.p.A. ("MPS") [Member] | Secured Revolving Credit Facility [Member] | EuroLIBOR [Member] | Minimum [Member]      
Line of Credit Facility [Line Items]      
Margin interest rate 0.00%