Note 11 - Segment and Enterprise-wide Disclosures (Tables)

12 Months Ended

Dec. 31, 2019

Notes Tables

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

	Year ended December 31,
	2019		2018		2017
	(in thousands)
United States	$	63,130	$	59,078	$	58,470
Germany		12,400		12,445		11,576
Other countries		41,702		34,045		30,821
Net sales	$	117,232	$	105,568	$	100,867

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

	As of December 31,
	2019		2018
	(in thousands)
United States	$	24,885	$	11,006
Australia		1,499		1,460
France		1,089		1,071
Germany		1,405		430
Other countries		1,184		135
Total long-term assets	$	30,062	$	14,102