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Note 2 - Income Per Share - Antidilutive Securities Excluded from Calculation of Diluted Income (Loss) Per Share (Details) - shares	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Total anti-dilutive securities (in shares)	8,183,592	5,971,847
Restricted Stock Units (RSUs) [Member]
Total anti-dilutive securities (in shares)	3,216,816	2,164,404
Share-based Payment Arrangement, Option [Member]
Total anti-dilutive securities (in shares)	2,568,000	2,142,000
Warrant [Member]
Total anti-dilutive securities (in shares)	2,398,776	1,665,443

X

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

+ Details

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