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Related Party Receivables (Details) - USD ($)
$ in Thousands
3 Months Ended
Nov. 30, 2016
Mar. 11, 2014
Jan. 31, 2017
Jan. 31, 2016
Oct. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Related-party accounts receivable     $ 1,639   $ 1,235
Total marketable securities, net of tax     114 $ (140)  
Suzhou Sanji Foundry Equipment Co., LTD. [Member] | Joint Venture [Member]          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Common Stock, Percentage Owned by Related Party 55.00%        
Proceeds from divestiture of interest in joint venture $ 1,170        
MTD Holdings Inc. [Member] | Significant Shareholder [Member]          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Revenue from Related Parties     1,598 $ 33  
Related-party accounts receivable     $ 1,639   $ 1,235
Velocys [Member] | Investee [Member]          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Payments to Acquire Marketable Securities   $ 2,000      
Marketable Securities   1,527      
Premium Paid, Investments   $ 473