Note 7 - Fair Value of Assets and Liabilities (Details Textual) - USD ($) $ in Millions	Apr. 02, 2016	Jan. 02, 2016
Monolith [Member]
Cost Method Investments, Fair Value Disclosure	$ 3.5	$ 3.5

Fair value portion of investments accounted under the cost method.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 325
-SubTopic 20
-Section 25
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=29638263&loc=d3e39828-111592

Name:	us-gaap_CostMethodInvestmentsFairValueDisclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant