Note 13 - Options - Options Activity (Details) - $ / shares	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021
Options outstanding (in shares)	541,187	459,524
Options outstanding, exercise price (in dollars per share)	$ 6.77	$ 8.7
Options granted (in shares)	137,597	257,975
Options granted, exercise price (in dollars per share)	$ 2.99	$ 4.36
Options cancelled (in shares)	(87,793)	(176,312)
Options cancelled, exercise price (in dollars per share)	$ (7.11)	$ (12.66)
Options outstanding (in shares)	590,991	541,187
Options outstanding, exercise price (in dollars per share)	$ 4.53	$ 6.77
Options Exercisable (in shares)	160,199
Weighted Average Exercise Price Exercisable (in dollars per share)	$ 5.02

The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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- Definition

The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

+ References

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- Definition

Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements.

+ References

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Gross number of share options (or share units) granted during the period.

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- 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
-Subparagraph (c)(1)(i)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(ii)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

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- Definition

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

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- Definition

Weighted average price at which grantees could have acquired the underlying shares with respect to stock options of the plan that expired.

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- Definition

Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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