Note 12 - Segment Information (Tables)

12 Months Ended

Dec. 31, 2017

Notes Tables

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

	North America			International			Total
For the year ended December 31, 2017
Net Sales	$	78,568,219		$	3,753,049		$	82,321,268
Gross Profit		49,889,888			2,223,941			52,113,829
Operating earnings		7,498,817			(256,995	)		7,241,822
Interest expense		205,555			-			205,555
Other expense, net		(135,011	)		8,154			(126,857	)
Income before income taxes		7,428,370			(265,246	)		7,163,124
Depreciation and amortization		1,790,421			84,681			1,875,102
Fixed asset additions		1,666,171			23,474			1,689,645
Total assets	$	70,302,116		$	4,612,480		$	74,914,596
For the year ended December 31, 2016
Net Sales	$	79,041,920		$	3,882,072		$	82,923,992
Gross Profit		49,315,003			2,398,239			51,713,242
Operating earnings		10,224,773			75,958			10,300,731
Interest expense		155,189			-			155,189
Other expense, net		(35,290	)		(21,997	)		(57,287	)
Income before income taxes		10,104,873			97,956			10,202,829
Depreciation and amortization		1,631,534			87,620			1,719,154
Fixed asset additions		1,609,829			87,875			1,697,704
Total assets	$	66,502,432		$	4,150,288		$	70,652,720
For the year ended December 31, 2015
Net Sales	$	80,468,597		$	3,692,603		$	84,161,200
Gross Profit		49,838,455			2,232,605			52,071,060
Operating earnings		10,353,404			121,296			10,474,700
Interest expense		330,004			-			330,004
Other expense, net		(63,230	)		(11,127	)		(74,357	)
Income before income taxes		10,086,630			132,423			10,219,053
Depreciation and amortization		1,509,592			57,580			1,567,172
Fixed asset additions		1,878,229			285,811			2,164,040
Total assets	$	59,894,498		$	4,716,578		$	64,611,076

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

	201 7		201 6		201 5
United States	$	70,453,773	$	70,886,401	$	72,061,009
Canada		7,224,894		7,199,155		7,543,468
All other countries		4,642,601		4,838,436		4,556,723
	$	82,321,268	$	82,923,992	$	84,161,200