Note 8 - Segment and Enterprise-wide Disclosures (Tables)

6 Months Ended

Jun. 30, 2019

Notes Tables

Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block]

	Three months ended				Six months ended
	June 30,				June 30,
	2019		2018		2019		2018
	(in thousands)				(in thousands)
United States	$	16,006	$	14,864	$	30,764	$	29,684
Germany		3,192		3,257		6,272		6,364
Other countries		10,285		8,899		20,926		16,966
Net Sales	$	29,483	$	27,020	$	57,962	$	53,014