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Note 7 - Stock Based Compensation - Summary of Intrinsic Value (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	9 Months Ended
	Sep. 30, 2023	Dec. 31, 2022
Outstanding, number of shares underling options (in shares)	13	13
Outstanding, weighted average exercise price per share (in dollars per share)	$ 5.47	$ 5.47
Outstanding, weighted average remaining contractual life (Year)	4 years 6 months
Outstanding, aggregate intrinsic value	$ 129

X

- Definition

Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

+ References

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-Name Accounting Standards Codification
-Topic 718
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-Section 50
-Paragraph 2
-Publisher FASB
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X

- Definition

Number of options outstanding, including both vested and non-vested options.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
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- Definition

Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
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-Subparagraph (c)(1)(i)
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X

- Definition

Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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