Note 11 - Financial Information about Geographic Areas (Tables)

9 Months Ended

Sep. 30, 2019

Notes Tables

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

	For the Three Months Ended				For the Nine Months Ended
	September 30,				September 30,
	2019		2018		2019		2018
Net sales by geographic region
United States	$	11,806,000	$	11,918,000	$	35,004,000	$	34,977,000
International		221,000		186,000		741,000		678,000
Consolidated net sales	$	12,027,000	$	12,104,000	$	35,745,000	$	35,655,000

	September 30,		December 31,
	2019		2018
Long-lived assets by geographic region
United States	$	3,240,000	$	2,528,000
International		762,000		716,000
Consolidated total long-lived assets	$	4,002,000	$	3,244,000