Annual report pursuant to Section 13 and 15(d)

Supplementary Data - Quarterly Financial Data (Details)

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Supplementary Data - Quarterly Financial Data (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended 12 Months Ended
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Supplementary Data - Quarterly Financial Data [Abstract]                      
Net sales $ 48,801 $ 48,742 $ 31,915 $ 46,419 $ 36,339 $ 42,040 $ 28,338 $ 39,058 $ 175,877 $ 145,775 $ 75,912
Gross profit 17,723 18,459 12,466 18,616 14,249 15,997 11,035 15,071 67,264 56,352 23,732
Operating Income (Loss) (2,097) 1,535 (1,991) 4,729 840 2,954 (896) 1,968 2,176 4,866 (16,367)
Net income (loss) $ 544 $ 726 $ (1,908) $ 2,590 $ 3,528 $ 1,007 $ (811) $ 1,168 $ 1,952 $ 4,892 $ 51,190
Earnings (loss) per share:                      
Basic earnings (loss) per share $ 0.02 $ 0.02 $ (0.06) $ 0.10 $ 0.16 $ 0.05 $ (0.04) $ 0.05 $ 0.07 $ 0.22 $ 2.58
Diluted earnings (loss) per share $ 0.02 $ 0.02 $ (0.06) $ 0.10 $ 0.16 $ 0.05 $ (0.04) $ 0.05 $ 0.06 $ 0.22 $ 2.56