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Note 12 - Treasury Stock Transactions (Details Textual) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Apr. 03, 2021	Mar. 28, 2020	Jan. 13, 2021
Treasury Stock, Shares, Acquired (in shares)	344,172	0
Treasury Stock Acquired, Average Cost Per Share (in dollars per share)	$ 2.65
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 6.6
Maximum [Member]
Stock Repurchase Program, Authorized Amount			$ 7.5

X

- Definition

Amount of stock repurchase plan authorized.

+ References

No definition available.

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X

- Definition

Amount remaining of a stock repurchase plan authorized.

+ References

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X

- Definition

Total cost of shares repurchased divided by the total number of shares repurchased.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 30
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655

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- Definition

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

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
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-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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