Note 3 - Equity - Schedule of Restricted Stock Units (Details) - Share-Based Payment Arrangement, Nonemployee [Member]	3 Months Ended
Mar. 31, 2022 $ / shares shares
Restricted Stock [Member]
Outstanding (in shares) \| shares	897,731
Granted (in shares) \| shares	30,940
Restricted Stock Units (RSUs) [Member]
Outstanding (in dollars per share) \| $ / shares	$ 5.35
Granted (in dollars per share) \| $ / shares	$ 5.16
Vested and issued (in shares) \| shares	(940)
Vested and issued (in dollars per share) \| $ / shares	$ 5.32
Forfeited (in shares) \| shares	(16,873)
Forfeited (in dollars per share) \| $ / shares	$ 5.35
Outstanding (in shares) \| shares	910,858
Outstanding (in dollars per share) \| $ / shares	$ 5.35

Number of non-option equity instruments vested and issued.

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- Definition

Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(i)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(ii)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

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- Definition

The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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- Definition

Number of shares under non-option equity instrument agreements that were cancelled as a result of occurrence of a terminating event.

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Net number of non-option equity instruments granted to participants.

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- Definition

Number of equity instruments other than options outstanding, including both vested and non-vested instruments.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

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