Note 11 - Treasury Stock Transactions (Details Textual) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
Apr. 02, 2022	Apr. 03, 2021	Nov. 12, 2021	Jan. 13, 2021
Treasury Stock, Shares, Acquired (in shares)	406,480	344,172
Treasury Stock Acquired, Average Cost Per Share (in dollars per share)	$ 6.84	$ 2.65
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 7.3
Maximum [Member]
Stock Repurchase Program, Authorized Amount			$ 19.1	$ 7.5

Number of shares that have been repurchased during the period and are being held in treasury.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI https://asc.fasb.org/extlink&oid=126973232&loc=d3e21463-112644

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI https://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration