Note 5 - Changes in the Carrying Amount of Goodwill (Details) $ in Thousands	6 Months Ended
Jun. 30, 2016 USD ($)
Package Testing Segment [Member]
Balance	$ 4,967
Foreign currency translation	101
Sale of business
Balance	5,068
Permeation Segment [Member]
Balance	1,860
Foreign currency translation	27
Sale of business	(57)
Balance	1,830
Industrial Analyzers and Other Segment [Member]
Balance	610
Foreign currency translation
Sale of business
Balance	610
Balance	7,437
Foreign currency translation	128
Sale of business	(57)
Balance	$ 7,508

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=64834752&loc=SL49117168-202975

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Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

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