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

9 Months Ended

Sep. 30, 2019

Notes Tables

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

	Three months ended				Nine months ended
	September 30,				September 30,
	2019		2018		2019		2018
	(in thousands)				(in thousands)
United States	$	16,251	$	13,937	$	47,015	$	43,620
Germany		3,074		3,058		9,346		9,421
Other countries		9,775		7,170		30,701		24,138
Net Sales	$	29,100	$	24,165	$	87,062	$	77,179