Annual report pursuant to Section 13 and 15(d)

Quarterly Results of Operations (Unaudited) (Details)

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Quarterly Results of Operations (Unaudited) (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended 12 Months Ended
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Quarterly Results of Operations (Unaudited)                      
Net sales $ 89,853 $ 70,462 $ 74,095 $ 65,980 $ 85,447 $ 75,534 $ 69,169 $ 66,907 $ 300,390 $ 297,057 $ 250,169
Gross Profit 7,812 5,265 5,965 5,313 7,037 5,698 5,590 5,567 24,355 23,892 23,241
Net income $ 2,503 $ 1,330 $ 1,540 $ 1,020 $ 1,804 $ 1,352 $ 1,304 $ 1,029 $ 6,393 $ 5,489 $ 5,539
Basic net income per common share (in dollars per share) $ 0.56 $ 0.30 $ 0.35 $ 0.23 $ 0.40 $ 0.30 $ 0.29 $ 0.23 $ 1.44 $ 1.23 $ 1.26
Diluted net income per common share (in dollars per share) $ 0.55 $ 0.29 $ 0.34 $ 0.22 $ 0.39 $ 0.29 $ 0.28 $ 0.22 $ 1.41 $ 1.19 $ 1.20