Note 15 - Quarterly Financial Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2013

Quarterly Financial Information Disclosure [Abstract]

Schedule of Quarterly Financial Information [Table Text Block]

	First		Second		Third		Fourth
2013	Quarter		Quarter		Quarter		Quarter
Net sales	$	19,237,827	$	18,973,013	$	18,524,604	$	21,549,141
Gross profit		11,930,829		11,920,121		11,700,943		13,776,131
Net income from continuing operations		1,586,321		1,629,353		1,561,832		2,488,211
Net income		1,586,321		1,629,353		1,561,832		2,488,211
Net income from continuing operations per common share:
Basic	$	0.16	$	0.16	$	0.15	$	0.24
Diluted	$	0.16	$	0.16	$	0.15	$	0.24
Net income per common share:
Basic	$	0.16	$	0.16	$	0.15	$	0.24
Diluted	$	0.16	$	0.16	$	0.15	$	0.24
Weighted average number of common shares outstanding:
Basic		10,162,442		10,167,649		10,176,744		10,198,733
Diluted		10,194,219		10,216,535		10,221,512		10,233,009

	First		Second		Third		Fourth
2012	Quarter		Quarter		Quarter		Quarter
Net sales	$	18,177,078	$	16,904,254	$	17,000,728	$	20,638,564
Gross profit		11,365,633		10,940,201		10,404,770		13,195,070
Net income from continuing operations		1,574,105		1,539,639		280,770		2,201,556
Net income		1,574,105		1,539,639		280,770		2,201,556
Net income from continuing operations per common share:
Basic		0.15		0.15		0.03		0.22
Diluted		0.15		0.15		0.03		0.22
Net income per common share:
Basic		0.15		0.15		0.03		0.22
Diluted		0.15		0.15		0.03		0.22
Weighted average number of common shares outstanding:
Basic		10,156,442		10,156,442		10,156,442		10,159,877
Diluted		10,172,950		10,172,171		10,177,466		10,178,759