Note 6 - Acquisitions (Details Textual) - USD ($) $ in Millions	6 Months Ended
Jul. 04, 2015	Jun. 28, 2014
BGA [Member]
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High	$ 2.6
PCI [Member]
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High	2.0
Payments to Acquire Businesses, Gross	$ 0.1	$ 0.3

The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 13

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3213-108585

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