Consolidated Statements of Operations - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Income Statement [Abstract]
Net sales	$ 29,188,400	$ 24,343,600
Operating costs and expenses:
Cost of sales	16,808,600	13,691,700
Advertising	1,532,600	812,700
Selling	5,311,200	4,848,900
General and administrative	3,258,200	2,876,000
Total operating costs and expenses	26,910,600	22,229,300
Income from operations	2,277,800	2,114,300
Other income	26,900	52,200
Interest expense	(29,300)	(29,200)
Income before income taxes	2,275,400	2,137,300
Income tax benefit (expense)	2,504,500	(43,900)
Net income	$ 4,779,900	$ 2,093,400
Net income per common share :
Basic	$ 0.41	$ 0.18
Diluted	$ 0.40	$ 0.18
Weighted average shares outstanding:
Basic	11,634,515	11,507,944
Diluted	11,916,038	11,781,839