Note 4 - Property and Equipment (Tables)

12 Months Ended

Dec. 31, 2018

Notes Tables

Property, Plant and Equipment [Table Text Block]

	As of December 31,
	2018			2017
	(in thousands)
Computers and equipment	$	4,077		$	3,204
Machinery and equipment		13,718			12,223
Building and leasehold improvements		11,651			10,843
Gross property and equipment		29,446			26,270
Less accumulated depreciation		(15,344	)		(13,892	)
Property and equipment, net	$	14,102		$	12,378

Depreciation Expense [Table Text Block]

	Year ended December 31,
	2018		2017		2016
			(in thousands)
Depreciation expense	$	2,564	$	2,266	$	1,986