Note 10 - Quarterly Results for 2012 and 2013 (Tables)

12 Months Ended

Dec. 31, 2013

Quarterly Financial Information Disclosure [Abstract]

Schedule of Quarterly Financial Information [Table Text Block]

	Quarter Ended
	March 31, 2012		June 30, 2012		September 30, 2012		December 31, 2012
Net sales	$	28,508,000	$	29,335,000	$	30,599,000	$	31,044,000
Gross profit	$	9,462,000	$	9,662,000	$	10,032,000	$	10,607,000
Income before taxes on income	$	537,000	$	1,567,000	$	1,692,000	$	825,000
Net income	$	327,000	$	977,000	$	1,242,000	$	485,000
Per Share Data:
Basic
Net income	$	0.05	$	0.16	$	0.20	$	0.08
Diluted
Net income	$	0.05	$	0.16	$	0.20	$	0.08
Average Outstanding Shares (Basic)		6,025,874		6,066,244		6,063,269		6,091,377
Average Outstanding Shares (Diluted)		6,142,616		6,140,986		6,148,012		6,140,372

	Quarter Ended
	March 31, 2013		June 30, 2013		September 30, 2013		December 31, 2013
Net sales	$	30,985,000	$	30,854,000	$	44,184,000	$	45,473,000
Gross profit	$	11,313,000	$	11,178,000	$	15,040,000	$	15,027,000
Income before taxes on income	$	1,749,000	$	2,068,000	$	2,128,000	$	2,545,000
Net income	$	1,229,000	$	1,438,000	$	1,508,000	$	1,675,000
Per Share Data:
Basic
Net income	$	0.20	$	0.23	$	0.24	$	0.26
Diluted
Net income	$	0.20	$	0.23	$	0.24	$	0.25
Average Outstanding Shares (Basic)		6,121,180		6,126,323		6,346,260		6,452,587
Average Outstanding Shares (Diluted)		6,169,475		6,170,121		6,403,893		6,630,926