Note 14 - Quarterly Financial Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2016

Notes Tables

Quarterly Financial Information [Table Text Block]

	First		Second		Third		Fourth
20 16	Quarter		Quarter		Quarter		Quarter
Net sales	$	20,672,227	$	19,552,905	$	18,628,362	$	24,100,498
Gross profit		12,652,746		12,895,790		11,644,871		14,519,835
Net income		1,520,997		1,820,915		1,000,350		2,059,997
Net income per common share:
Basic	$	0.16	$	0.19	$	0.11	$	0.23
Diluted	$	0.16	$	0.19	$	0.11	$	0.23
Weighted average number of common shares outstanding:
Basic		9,698,951		9,209,446		9,188,483		9,188,483
Diluted		9,718,453		9,227,941		9,206,382		9,301,867

	First		Second		Third		Fourth
20 15	Quarter		Quarter		Quarter		Quarter
Net sales	$	20,788,764	$	19,773,528	$	19,355,937	$	24,292,971
Gross profit		12,582,927		12,814,382		11,832,697		14,841,054
Net income		1,444,407		1,507,896		1,111,344		2,338,758
Net income per common share:
Basic	$	0.14	$	0.15	$	0.11	$	0.24
Diluted	$	0.14	$	0.15	$	0.11	$	0.24
Weighted average number of common shares outstanding:
Basic		10,211,333		10,212,933		10,175,650		9,692,860
Diluted		10,241,096		10,241,164		10,199,092		9,712,571