Note 7 - Income Tax Expense (Tables)

12 Months Ended

Dec. 31, 2020

Notes Tables

Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]

	Years Ended December 31,
	2020			2019			2018
Current:
Federal	$	12,997		$	3,049		$	3,613
State and local		1,956			1,074			643
Foreign		486			502			789
		15,439			4,625			5,045
Deferred Taxes:
Deferred tax (benefit) provision		(5,009	)		(1,405	)		(625	)
Income tax expense	$	10,430		$	3,220		$	4,420

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

	December 31,
	2020			2019
Deferred income tax assets:
Pension accruals	$	3,742		$	2,588
Operating reserves and other accruals		5,110			2,540
Tax credits		513			923
Valuation allowance on tax credits		-			(923	)
Deferred income tax liabilities:
Book carrying value in excess of tax basis of property		(2,116	)		(1,544	)
Book carrying value in excess of tax basis of intangibles		(5,780	)		(7,024	)
Tax effect of revenue recognition standard ASC 606		(1,021	)		(1,771	)
Deferred expenses		(898	)		(1,831	)
Net deferred income tax liability	$	(450	)	$	(7,042	)

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

	Years Ended December 31,
	2020			2019			2018
Statutory federal income tax rate		21.0	%		21.0	%		21.0	%
State and local income taxes, net of federal income tax benefit		1.3	%		4.8	%		2.0	%
Rate impacts due to foreign operations		(4.5	%)		(3.9	%)		(2.7	%)
Changes in uncertain tax positions		0.2	%		1.7	%		0.4	%
Compensation related		2.3	%		(0.2	%)		1.4	%
R&D tax credits		(0.3	%)		(0.9	%)		(0.4	%)
Other		0.3	%		(1.4	%)		(1.0	%)
Effective income tax rate		20.3	%		21.1	%		20.7	%

Summary of Income Tax Contingencies [Table Text Block]

	December 31,
	2020			2019
Balance at the beginning of year	$	681		$	477
Additions based on tax positions related to the current year		134			128
Additions for tax positions of prior years		286			173
Reductions due to lapse of statute of limitations		(108	)		(97	)
Balance at the end of year	$	993		$	681