Note 12 - Segment and Enterprise-wide Disclosures (Tables)

12 Months Ended

Dec. 31, 2020

Notes Tables

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

	Year ended December 31,
	2020		2019		2018
	(in thousands)
United States	$	75,222	$	63,130	$	59,078
Germany		12,365		12,400		12,445
Other countries		41,779		41,702		34,045
Net sales	$	129,366	$	117,232	$	105,568

Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block]

	As of December 31,
	2020		2019
	(in thousands)
United States	$	27,660	$	24,885
Australia		115		1,499
France		1,140		1,089
Germany		1,138		1,405
Other countries		1,049		1,184
Total long-term assets	$	31,102	$	30,062