Note 15 - Segment Information (Tables)

12 Months Ended

Dec. 31, 2018

Notes Tables

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

	2018		2017
Net sales to external customers
United States	$	27,673,352	$	32,474,797
Australia/New Zealand		732,227		922,594
Canada		718,560		914,775
Mexico		474,372		445,299
Europe (1)		3,972,381		4,578,095
Asia (2)		2,544,849		2,453,222
Total net sales	$	36,115,741	$	41,788,782
Assets by area
United States	$	13,584,424	$	18,100,872
Australia/New Zealand		540,591		572,368
Canada		166,533		265,629
Mexico		179,713		219,501
Europe (1)		867,008		1,032,641
Asia (2)		1,015,596		884,985
Total consolidated assets	$	16,353,865	$	21,075,996

Schedule of Segment Reporting Information by Product [Table Text Block]

	2018		2017
Net sales by product category
Nutritional and dietary supplements	$	32,670,362	$	37,326,863
Sales aids, membership fees, and other		1,247,807		1,424,494
Handling & freight income		2,197,572		3,037,425
Total net sales	$	36,115,741	$	41,788,782