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Note 3 - Net Loss Per Share (Details Textual) - $ / shares | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jul. 02, 2023 | Jul. 02, 2023 | May 29, 2018
Common Stock [Member] |  |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) |  |  | $ 19.32
Warrants and Rights Outstanding, Maturity Date |  |  | May 29, 2023
Common Stock [Member] | Maximum [Member] |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) |  |  | 386,000
Share-Based Payment Arrangement [Member] |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) | 739 | 536 |

X
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- Definition Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481112/505-10-50-3 + Details
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- Definition Expiration date of outstanding warrant and right embodying unconditional obligation requiring redemption by transferring asset at specified or determinable date or upon event certain to occur, in YYYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 + Details
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