Note 11 - Financial Information about Geographic Areas (Tables)

9 Months Ended

Sep. 30, 2018

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,
	2018		2017		2018		2017
Net sales by geographic region
United States	$	11,918,000	$	11,739,000	$	34,977,000	$	33,469,000
International		186,000		310,000		678,000		613,000
Consolidated net sales	$	12,104,000	$	12,049,000	$	35,655,000	$	34,082,000

	September 30,		December 31,
	2018		2017
Long-lived assets by geographic region
United States	$	2,554,000	$	2,593,000
International		604,000		565,000
Consolidated total long-lived assets	$	3,158,000	$	3,158,000