Note 5 - Goodwill and Other Intangibles (Tables)

12 Months Ended

Dec. 31, 2020

Notes Tables

Schedule of Goodwill [Table Text Block]

	As of December 31,
	2020			2019
Balance at beginning of year	$	39,951		$	29,868
Additions for acquisitions		27,115			10,092
Purchase accounting adjustments		(1,345	)		-
Effects of currency exchange		224			(9	)
Balance at end of year	$	65,945		$	39,951

Schedule of Finite-Lived Intangible Assets [Table Text Block]

	December 31, 2020						December 31, 2019
	Gross				Net		Gross				Net
	Carrying		Accumulated		Carrying		Carrying		Accumulated		Carrying
	Value		Amortization		Value		Value		Amortization		Value
	(in thousands)
Product technology and intellectual property	$	29,951	$	7,947	$	22,004	$	13,502	$	5,722	$	7,780
Trademarks, tradenames and licenses		4,000		1,094		2,906		1,807		702		1,105
Customer relationships		38,525		5,424		33,101		18,215		3,364		14,851
Other intangible assets		1,767		873		894		1,725		568		1,157
Total identifiable intangible assets	$	74,243	$	15,338	$	58,905	$	35,249	$	10,356	$	24,893

Finite-lived Intangible Assets Amortization Expense [Table Text Block]

	Year ended December 31,
	2020		2019		2018
			(in thousands)
Amortization expense	$	5,043	$	2,437	$	1,760

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]

	Year ended December 31,
	2021		2022		2023		2024		2025
	(in thousands)
Amortization expense	$	6,179	$	5,975	$	5,902	$	5,706	$	5,467