Note 8 - Acquisition of Business (Details) - Pro Forma Results of Operations (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Condensed Income Statements, Captions [Line Items]
Net sales	$ 44,184,000	$ 30,599,000	$ 106,023,000	$ 88,442,000
Income before taxes on income	2,128,000	1,692,000	5,945,000	3,796,000
Net income	1,508,000	1,242,000	4,175,000	2,546,000
(Basic) (in Shares)	6,346,260	6,063,269	6,197,921	6,051,795
(Diluted) (in Shares)	6,403,893	6,148,012	6,247,830	6,143,871
Basic
Net income (in Dollars per share)	$ 0.24	$ 0.20	$ 0.67	$ 0.42
Diluted
Net income (in Dollars per share)	$ 0.24	$ 0.20	$ 0.67	$ 0.41
Scenario, Actual [Member]
Condensed Income Statements, Captions [Line Items]
Net sales	44,184,000
Income before taxes on income	2,893,000
Net income	2,003,000
(Basic) (in Shares)	6,346,260
(Diluted) (in Shares)	6,403,893
Basic
Net income (in Dollars per share)	$ 0.32
Diluted
Net income (in Dollars per share)	$ 0.31
Pro Forma [Member]
Condensed Income Statements, Captions [Line Items]
Net sales		37,971,000	123,365,000	110,029,000
Income before taxes on income		1,899,000	7,133,000	2,869,000
Net income		$ 1,379,000	$ 4,943,000	$ 1,949,000
(Basic) (in Shares)		6,271,886	6,337,694	6,260,412
(Diluted) (in Shares)		6,356,629	6,387,603	6,352,488
Basic
Net income (in Dollars per share)		$ 0.22	$ 0.78	$ 0.31
Diluted
Net income (in Dollars per share)		$ 0.22	$ 0.77	$ 0.31