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Note 15 - Employee Benefit Plans - Weighted Average Asset Allocations (Details)	12 Months Ended
	Jan. 01, 2017	Jan. 03, 2016
Percentage of Plan Assets at Year End	100.00%	100.00%
Maximum [Member]
Target Allocation	100.00%
Equity Securities [Member]
Target Allocation	50.00%
Percentage of Plan Assets at Year End	43.00%	49.00%
Equity Securities [Member] | Minimum [Member]
Target Allocation	40.00%
Debt Securities [Member]
Target Allocation	45.00%
Percentage of Plan Assets at Year End	36.00%	41.00%
Debt Securities [Member] | Minimum [Member]
Target Allocation	35.00%
Other Securities [Member]
Target Allocation	20.00%
Percentage of Plan Assets at Year End	21.00%	10.00%
Other Securities [Member] | Minimum [Member]
Target Allocation	10.00%

X

- Definition

Target allocation of investments of this type to total plan assets presented on a weighted average basis.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 5
-Subparagraph (c)(i)
-URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e2446-114920

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)(i)
-URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Percentage of fair value of investments (categorized by debt securities, equity securities, real estate and other plan assets) to the fair value of plan assets held.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 5
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e2446-114920

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)(1)
-URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920

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