Note 11 - Segment Information (Tables)

12 Months Ended

Dec. 31, 2018

Notes Tables

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

	North America			International			Total
For the year ended December 31, 2018
Net Sales	$	79,553,353		$	3,544,834		$	83,098,187
Gross Profit		48,375,877			2,204,314			50,580,191
Operating earnings		4,182,969			(354,506	)		3,828,463
Interest expense		304,957			-			304,957
Other (income) expense, net		(150,067	)		(30,124	)		(180,191	)
Income before income taxes		4,028,079			(324,382	)		3,703,697
Depreciation and amortization		1,696,656			100,625			1,797,281
Fixed asset additions		1,000,263			91,170			1,091,433
Total assets	$	71,578,634		$	4,561,500		$	76,140,134
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

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

	201 8		201 7		201 6
United States	$	71,443,246	$	70,453,773	$	70,886,401
Canada		7,120,452		7,224,894		7,199,155
All other countries		4,534,489		4,642,601		4,838,436
	$	83,098,187	$	82,321,268	$	82,923,992