Note 7 - Segment Information (Tables)

3 Months Ended

Mar. 31, 2018

Notes Tables

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

	North America			International			Total
For the quarter ended March 31, 20 1 8
Net sales	$	19,317,260		$	971,658		$	20,288,918
Gross profit		12,226,002			616,960			12,842,962
Operating income (loss)		1,830,659			(61,698	)		1,768,961
Interest expense		64,642			-			64,642
Other (income) expense, net		(35,184	)		(3,688	)		(38,872	)
Income (loss) before income taxes		1,801,201			(58,010	)		1,743,191
Depreciation and amortization		441,552			23,970			465,522
Fixed asset additions		237,658			2,362			240,020
Total assets	$	70,292,225		$	4,755,762		$	75,047,987
For the quarter ended March 31, 20 1 7
Net sales	$	19,231,714		$	918,131		$	20,149,845
Gross profit		11,752,957			533,088			12,286,045
Operating income (loss)		1,811,563			(74,072	)		1,737,491
Interest expense		36,344			-			36,344
Other (income) expense, net		(17,654	)		15,003			(2,651	)
Income before income taxes		1,792,873			(89,075	)		1,703,798
Depreciation and amortization		436,281			21,837			458,118
Fixed asset additions		597,826			1,931			599,757
Total assets	$	67,016,728		$	4,252,046		$	71,268,774

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

	201 8		201 7
United States	$	17,348,173	$	17,282,664
Canada		1,743,174		1,773,510
All other countries		1,197,571		1,093,671
	$	20,288,918	$	20,149,845