Note 15 - Income Taxes - Tax Rate Reconciliation (Details)	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
U.S. federal statutory rate in effect	21.00%	21.00%	21.00%
State and local taxes, net of federal benefit	4.50%	4.50%	1.00%
Meals and entertainment	0.20%	0.10%	(1.80%)
Tax credits	(0.10%)	(0.10%)	2.00%
Stock based compensation	0.00%	0.00%	(3.40%)
All other, net	0.80%	1.00%	0.20%
Effective income tax rate	26.40%	26.50%	19.00%

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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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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 meals and entertainment expense.

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Percentage of difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operation, attributable to expense for award under share-based payment arrangement. Excludes expense determined to be nondeductible upon grant or after for award under share-based payment arrangement.

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