Note 11 - Financial Information about Geographic Areas (Tables)

3 Months Ended

Mar. 31, 2019

Notes Tables

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

	For the Three Months Ended
	March 31,
	2019		2018
Net sales by geographic region
United States	$	12,040,000	$	11,198,000
International		264,000		244,000
Consolidated net sales	$	12,304,000	$	11,442,000

	March 31,		December 31,
	2019		2018
Long-lived assets by geographic region
United States	$	2,538,000	$	2,528,000
International		733,000		716,000
Consolidated total long-lived assets	$	3,271,000	$	3,244,000