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Note 15 - Income Taxes - Reconciliation of Statutory and Effective Tax Rates (Details)		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
U.S. statutory rate		21.00%	21.00%	21.00%
State taxes		4.00%	4.00%	4.30%
State tax rate differential		0.00%	(0.30%)	0.00%
Research and development credits		(2.40%)	(1.10%)	(1.00%)
State credits		(0.90%)	(1.50%)	(1.10%)
Share-based compensation	[1]	(0.40%)	(2.70%)	(3.80%)
Nondeductible U.S. compensation		1.00%	1.60%	1.50%
Foreign tax deduction		0.00%	(0.40%)	(1.50%)
Foreign deferred tax rate change		0.00%	0.00%	1.20%
Uncertain tax positions reserve		0.90%	0.00%	0.00%
Global intangible low tax income		1.70%	0.20%	0.00%
Other		0.30%	(1.20%)	(1.10%)
Effective tax rate		25.20%	19.60%	19.50%
[1] With the adoption of ASU 2016-09 in 2017, excess tax benefits from equity awards are reflected within the provision for income taxes rather than within the consolidated balance sheet.

X

- Definition

Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to foreign deferred tax rate change.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to state tax credit.

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Percentage of reported income tax expense from difference to expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operations, attributable to global intangible low-taxed income (GILTI).

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to research tax credit.

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