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Note 9 - Per Share Data (Tables)

3 Months Ended

Mar. 31, 2022

Notes Tables

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

		Three Months Ended March 31,
		2022				2021
Net loss for basic earnings per share		$	(361,049	)		$	(812,105	)
Less: Gain from change in fair value of warrants			351,104				918,801
Net loss, adjusted for change in fair value of warrants for diluted earnings per share		$	(712,153	)		$	(1,730,906	)
Weighted-average shares			73,070,565				76,757,010
Effect of potential common shares			812,493				815,577
Weighted-average shares: diluted			73,883,058				77,572,587
Loss per share: basic		$	(0.00	)		$	(0.01	)
Loss per share: diluted		$	(0.01	)		$	(0.02	)

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]

		Three Months Ended March 31,
		2022				2021
Warrants			—				—
Stock options			150,000				186,191
Restricted stock units (1)			325,903				163,946

X

- Definition

Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI https://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257

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X

- Definition

Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
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