Acquisitions of and Investments in Businesses and Technologies (Details) (USD $) In Thousands, except Share data, unless otherwise specified	9 Months Ended		0 Months Ended			3 Months Ended	9 Months Ended		0 Months Ended
	Oct. 31, 2014	Oct. 31, 2013	May 01, 2014 SBG Innovatie [Member]	May 01, 2014 Navtronics [Member]	May 01, 2014 SBG Innovatie and Affiliates [Member]	Oct. 31, 2014 SBG Innovatie and Affiliates [Member]	Oct. 31, 2014 SBG Innovatie and Affiliates [Member]	May 01, 2014 SBG Innovatie and Affiliates [Member]	Nov. 03, 2014 Subsequent Event [Member] Integra Plastics [Member]
Business Combination, Description [Abstract]
Business Acquisition, Date of Acquisition Agreement					May 01, 2014				Nov. 03, 2014
Business Acquisition, Name of Acquired Entity			SBG Innovatie BV	Navtronics BVBA					Integra Plastics, Inc.
Business Combination, Consideration Transferred					$ 5,000				$ 48,600
Payments to Acquire Businesses, Gross									9,400
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares									1,541,696
Working Capital Adjustment Term in Days									90 days
Contingent consideration, potential cash payment								2,500
Contingent Consideration Term in Years					10 years
Business Combination, Contingent Consideration Arrangements [Abstract]
Acquisition-related contingent consideration						1,255	1,255
Business Combination, Contingent Consideration, Liability, Current						236	236
Business Combination, Contingent Consideration, Liability, Noncurrent						1,019	1,019
Payments of acquisition-related contingent liability	(491)	(353)				37	37
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets [Abstract]
Goodwill, Acquired During Period							3,250
Finite-lived Intangible Assets Acquired							2,104
Acquisition-related debt outstanding balance						$ 0	$ 0