Note 18 - Quarterly Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2019

Notes Tables

Quarterly Financial Information [Table Text Block]

	Year Ended December 31, 2019
	March 31,		June 30,		September 30,		December 31,
	2019		2019		2019		2019
Sales	$	21,836,087	$	24,514,636	$	22,244,681	$	21,103,124
Gross Profit		4,829,888		5,226,933		4,987,563		4,530,251
Operating Income		2,571,071		2,791,553		2,558,779		2,589,263
Net Income		1,745,458		1,831,479		1,694,868		1,708,058
Net Income per Common Share:
Basic	$	0.63	$	0.66	$	0.59	$	0.58
Diluted	$	0.55	$	0.57	$	0.52	$	0.51

	Year Ended December 31, 2018
	March 31,		June 30,		September 30,		December 31,
	2018		2018		2018		2018
Sales	$	11,878,700	$	13,593,192	$	19,771,137	$	21,135,277
Gross Profit		3,018,441		3,486,578		4,450,389		4,348,726
Operating Income		643,085		1,816,945		2,471,279		2,383,150
Net Income		373,752		394,625		1,497,079		1,348,254
Net Income per Common Share:
Basic	$	0.13	$	0.14	$	0.55	$	0.50
Diluted	$	0.11	$	0.13	$	0.48	$	0.43