Note 4 - Property and Equipment (Tables)

12 Months Ended

Dec. 31, 2020

Notes Tables

Property, Plant and Equipment [Table Text Block]

	As of December 31,
	2020			2019
	(in thousands)
Computers and equipment	$	5,046		$	4,623
Machinery and equipment		17,266			16,245
Building and leasehold improvements		12,809			11,758
Gross property and equipment		35,121			32,626
Less accumulated depreciation		(20,085	)		(17,772	)
Property and equipment, net	$	15,036		$	14,854

Depreciation Expense [Table Text Block]

	Year ended December 31,
	2020		2019		2018
			(in thousands)
Depreciation expense	$	3,181	$	2,979	$	2,564