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Note 8 - Per Share Data - Antidilutive Securities Excluded from Computation (Details) - shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Antidilutive securities (in shares)	29,873	1,124,585
Share-based Payment Arrangement, Option [Member]
Antidilutive securities (in shares)			340,284
Stock Appreciation Rights (SARs) [Member]
Antidilutive securities (in shares)			1,666
Restricted Stock Units (Stock Settled) [Member]
Antidilutive securities (in shares)			525,741

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=124432515&loc=d3e3550-109257

+ Details

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- Details

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