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Note 11 - Stockholders' Equity and Stock Incentive Plans (Details Textual) - USD ($)
$ in Thousands

1 Months Ended

3 Months Ended

12 Months Ended

Apr. 30, 2020

Mar. 31, 2023

Mar. 31, 2022

Mar. 31, 2021

Dec. 31, 2023

Dec. 31, 2022

Dec. 31, 2021

Dec. 31, 2020

May 04, 2023

Jun. 01, 2022

Oct. 21, 2021

Stock Repurchased and Retired During Period, Shares (in shares)

^[1],[2]

6,537,000

9,424,000

1,310,000

Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period, Intrinsic Value

$ 1,700

$ 6,800

$ 17,900

Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested in Period, Fair Value

0

$ 0

$ 0

Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount

0

Restricted Stock Units (RSUs) [Member]

Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount

$ 8,100

Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)

1 year 9 months 18 days

Performance Shares [Member]

Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)

3 years

Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount

$ 1,600

Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)

1 year 8 months 12 days

Share Based Compensation Arrangement By Share Based Payment Award, Awards if Only Threshhold Performance Met, Percentage

50.00%

Share Based Compensation Arrangement By Share Based Payment Award, Awards for Target Performance, Percentage

100.00%

Share Based Compensation Arrangement By Share Based Payment Award, Awards for Maximum Performance, Percentage

200.00%

Share-Based Compensation Arrangement by Share-Based Payment Award, Shares Issued in Period (in shares)

519,782

408,609

90,444

Shares Issued Per Unit (in shares)

2

1.58

0.33

Share-Based Payment Arrangement, Shares Withheld for Tax Withholding Obligation (in shares)

200,904

114,265

30,129

Share Based Payment Arrangement, Shares Issued In Period, Net of Tax Withholdings (in shares)

318,878

294,344

60,315

Shares to be Issued to Settle PSUs (in shares)

500,000

Career Shares [Member]

Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount

$ 1,400

Career Shares [Member] | Executive Officer [Member]

Share Based Compensation Arrangement By Share Based Payment Award, Award Eligibility Minimum Age (Year)

55 years

Share-based Compensation Arrangement by Share-based Payment Award, Award Requisite Service Period (Year)

10 years

Career Shares [Member] | Executive Officer [Member] | Share-Based Payment Arrangement, Tranche One [Member]

Share Based Compensation Arrangement By Share Based Payment Award, Service Period (Year)

10 years

Career Shares [Member] | Executive Officer [Member] | Share-Based Payment Arrangement, Tranche Two [Member]

Share Based Compensation Arrangement By Share Based Payment Award, Service Period (Year)

15 years

Career Shares [Member] | Executive Officer [Member] | Share-Based Payment Arrangement, Tranche Three [Member]

Share Based Compensation Arrangement By Share Based Payment Award, Service Period (Year)

20 years

The 2020 Plan [Member]

Share Based Compensation Arrangement By Share Based Payment Award Expiration of Plan (Year)

10 years

Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares)

3,300,000

Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares)

6,700,000

Common Stock, Capital Shares Reserved for Future Issuance (in shares)

9,000,000

The 2020 Plan [Member] | Share-Based Payment Arrangement, Option [Member]

Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)

3 years

The 2021 Program [Member]

Stock Repurchase Program, Authorized Amount

$ 500,000

$ 300,000

Stock Repurchase Program, Increase in Authorized Amount

$ 500,000

Stock Repurchase Program, Remaining Authorized Repurchase Amount

$ 326,300

[1]	All shares repurchased have been retired and constitute authorized but unissued shares.
[2]	Shares repurchased reflect repurchases settled during the twelve months ended December 31, 2023, 2022 and 2021. These amounts exclude repurchases, if any, traded but not yet settled on or before December 31 of each year.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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