Note 1 - Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2018

Notes Tables

Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block]

	March 31, 2018
	Balance at			Adjustments			Balance at
	December 31			Due to			January 1
	2017			ASU 2014-09			2018
Liabilities and stockholders' equity
Accumulated deficit	$	(10,040,229	)	$	(367,568	)	$	(10,407,797	)
Deferred revenue		-			367,568			367,568

	Three Months Ended March 31, 2018
				Without			Effect of
				Adoption of			Change
	As Reported			ASU 2014-09			Higher/(Lower)
Operating results
Net sales	$	10,003,239		$	9,991,047		$	12,192
Net income (loss)		(238,305	)		(250,497	)		12,192

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

	Three months ended March 31
	2018		2017
Net sales to external customers
United States	$	7,670,061	$	10,258,939
Australia/New Zealand		231,928		259,427
Canada		242,120		264,303
Mexico		107,371		157,317
Europe (1)		1,164,884		1,200,774
Asia (2)		586,875		637,022
Total net sales	$	10,003,239	$	12,777,782

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

	Three months ended March 31
	2018		2017
Net sales by product category
Nutritional and dietary supplements	$	9,069,356	$	11,419,619
Sales aids and other		322,025		415,497
Handling & freight income		611,858		942,666
Total net sales	$	10,003,239	$	12,777,782