Note 4 - Property and Equipment (Tables)

12 Months Ended

Dec. 31, 2021

Notes Tables

Property, Plant and Equipment [Table Text Block]

	As of December 31,
	2021			2020
	(in thousands)
Computers and equipment	$	5,667		$	5,046
Machinery and equipment		18,439			17,266
Building and leasehold improvements		15,884			12,809
Gross property and equipment		39,990			35,121
Less accumulated depreciation		(22,931	)		(20,085	)
Property and equipment, net	$	17,059		$	15,036

Depreciation Expense [Table Text Block]

	Year ended December 31,
	2021		2020		2019
			(in thousands)
Depreciation expense	$	3,280	$	3,181	$	2,979