Note 11 - Financial Information about Geographic Areas (Tables)

6 Months Ended

Jun. 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 Six Months Ended
	June 30,				June 30,
	2018		2017		2018		2017
Net sales by geographic region
United States	$	11,861,000	$	11,131,000	$	23,059,000	$	21,729,000
International		248,000		151,000		492,000		303,000
Consolidated net sales	$	12,109,000	$	11,282,000	$	23,551,000	$	22,032,000

	June 30,		December 31,
	2018		2017
Long-lived assets by geographic region
United States	$	2,581,000	$	2,593,000
International		530,000		565,000
Consolidated total long-lived assets	$	3,111,000	$	3,158,000