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Note 7 - Share-based Compensation - RSU and PSA Activity (Details) - Restricted Stock Units and Performance Stock Awards [Member]

9 Months Ended

Sep. 30, 2021

$ / shares

shares

Unvested RSUs and PSAs (in shares) | shares

129,572

^[1]

Unvested RSUs and PSAs, weighted average grant date fair value (in dollars per share) | $ / shares

$ 25.86

RSUs and PSAs granted (in shares) | shares

90,368

^[1]

RSUs and PSAs granted, weighted average grant date fair value (in dollars per share) | $ / shares

$ 33.30

RSUs and PSAs vested (2) (in shares) | shares

(58,809)

^[1],[2]

RSUs and PSAs vested (2) (in dollars per share) | $ / shares

$ 25.53

^[2]

Unvested RSUs and PSAs (in shares) | shares

161,131

^[1]

Unvested RSUs and PSAs, weighted average grant date fair value (in dollars per share) | $ / shares

$ 30.26

[1]	The number of PSAs disclosed in this table are at the target level of 100%.
[2]	For the PSAs vested on March 31, 2021, the actual number of common shares that were issued was determined by multiplying the PSAs by a payout percentage based on the performance-based conditions achieved. The payout percentage was 126% for the 2019-2020 performance period and 200% for the 2020 performance period.

X

- Definition

The number of grants made 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).

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(1)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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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).

+ References

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-Paragraph 2
-Subparagraph (c)(2)(iii)(1)
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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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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.

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-Publisher FASB
-Name Accounting Standards Codification
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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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