Note 2 - Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
Apr. 30, 2019	Apr. 30, 2018
Revenues	$ 78,035	$ 86,190
North America [Member]
Revenues	22,509	25,087
EMEA [Member]
Revenues	11,886	12,559
Asia Pacific [Member]
Revenues	5,981	8,519
Latin America [Member]
Revenues	78,035	86,190
Automotive [Member]
Revenues	29,072	37,062
Consumer Products and Food and Beverage [Member]
Revenues	11,978	13,790
High Technology and Industrial Products [Member]
Revenues	25,548	24,995
Life Sciences [Member]
Revenues	$ 11,437	$ 10,343

Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration