Acquisitions of and Investments in Businesses and Technologies (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Oct. 31, 2015	Oct. 31, 2014	Oct. 31, 2015	Oct. 31, 2014	Jan. 31, 2012	Jan. 31, 2015
Business Combination, Description [Abstract]
Goodwill	$ 40,712	$ 25,234	$ 40,712	$ 25,234		$ 52,148
Business Combination, Contingent Consideration Arrangements [Abstract]
Acquisition-related contingent consideration liability, Current	448	1,191	448	1,191		1,375
Acquisition-related contingent consideration liability, Noncurrent	1,483	3,587	1,483	3,587		$ 3,631
Payments of acquisition-related contingent liability			(773)	(491)
Cost of sales	50,639	66,953	$ 150,213	206,524
Integra Plastics [Member]
Business Combination, Description [Abstract]
Business Acquisition, Name of Acquired Entity			Integra Plastics, Inc.
Business Combination Cash received for working capital adjustment			$ 351
Business Acquisition, adjustment to consideration transferred			20
Business Combination, Consideration Transferred			48,262
Goodwill	27,422		27,422
Business Acquisition, Goodwill, Expected Tax Deductible Amount	0		$ 0
SBG Innovatie [Member]
Business Combination, Description [Abstract]
Business Acquisition, Name of Acquired Entity			SBG Innovatie BV
Navtronics [Member]
Business Combination, Description [Abstract]
Business Acquisition, Name of Acquired Entity			Navtronics BVBA
SBG Innovatie and Affiliates [Member]
Business Combination, Description [Abstract]
Business Acquisition, Date of Acquisition Agreement			May 01, 2014
Contingent consideration, potential cash payment	2,500		$ 2,500
Contingent Consideration Term in Years			10 years
Business Combination, Contingent Consideration Arrangements [Abstract]
Acquisition-related contingent consideration, total liability	1,338	1,583	$ 1,338	1,583
Acquisition-related contingent consideration liability, Current	329	298	329	298
Acquisition-related contingent consideration liability, Noncurrent	1,009	1,285	1,009	1,285
Payments of acquisition-related contingent liability	38	37	$ 188	37
Vista Research [Member]
Business Combination, Description [Abstract]
Business Acquisition, Date of Acquisition Agreement			Jan. 06, 2012
Contingent consideration, potential cash payment	15,000		$ 15,000
Business acquisition contingent consideration payments period			7 years		7 years
Business Combination, Contingent Consideration Arrangements [Abstract]
Acquisition-related contingent consideration, total liability	550	2,841	$ 550	2,841
Acquisition-related contingent consideration liability, Current	76	539	76	539
Acquisition-related contingent consideration liability, Noncurrent	474	2,302	474	2,302
Payments of acquisition-related contingent liability	0	$ 0	585	$ 454
Cost of Sales [Member] | Vista Research [Member]
Business Combination, Contingent Consideration Arrangements [Abstract]
Reduction in fair value of contingent consideration liability			2,273
Vista Research [Member] | Cost of Sales [Member]
Business Combination, Contingent Consideration Arrangements [Abstract]
Reduction in fair value of contingent consideration liability	2,273
As Previously Reported [Member]
Business Combination, Description [Abstract]
Goodwill	44,796		44,796
Business Combination, Contingent Consideration Arrangements [Abstract]
Cost of sales	51,440		151,014
Restatement Adjustments [Member]
Business Combination, Description [Abstract]
Goodwill	(4,084)		(4,084)
Business Combination, Contingent Consideration Arrangements [Abstract]
Cost of sales	$ (801)		$ (801)