Note 11 - Financial Information about Geographic Areas (Tables)

6 Months Ended

Jun. 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 Six Months Ended
	June 30,				June 30,
	2019		2018		2019		2018
Net sales by geographic region
United States	$	11,158,000	$	11,861,000	$	23,197,000	$	23,059,000
International		257,000		248,000		521,000		492,000
Consolidated net sales	$	11,415,000	$	12,109,000	$	23,718,000	$	23,551,000

	June 30,		December 31,
	2019		2018
Long-lived assets by geographic region
United States	$	2,474,000	$	2,528,000
International		758,000		716,000
Consolidated total long-lived assets	$	3,232,000	$	3,244,000