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Note 2 - Income Per Share (Details Textual) - shares	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures, Total (in shares)	167,000	132,000
Restricted Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share Because the Performance Targets Were Not Achieved , Amount (in shares)	153,000
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)	0	0
Share-Based Payment Arrangement, Option [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share Because the Performance Targets Were Not Achieved , Amount (in shares)	196,000
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)	0	0

X

- Definition

Represents antidilutive securities excluded from computation of earnings per share because the performance targets were not achieved.

+ References

No definition available.

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- 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)
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- Definition

Number of shares issued during the period related to Restricted Stock Awards, net of any shares forfeited.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
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-Name Accounting Standards Codification
-Topic 210
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