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Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 3 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Condensed Consolidated Statements of Comprehensive Income (Loss) [Abstract]    
Net sales $ 75,962 $ 82,579
Cost of goods sold 34,628 32,640
Gross profit 41,334 49,939
Operating expenses 44,167 46,194
Operating income (loss) (2,833) 3,745
Interest expense (82) (512)
Other income (expense), net (7) 16
Income (loss) from continuing operations before income taxes (2,922) 3,249
Income tax (benefit) expense (1,137) 1,199
Income (loss) from continuing operations (1,785) 2,050
Discontinued operations, net of income taxes (13) (30)
Net income (loss) (1,798) 2,020
Basic income (loss) per share of common stock:    
Continuing operations $ (0.21) $ 0.24
Discontinued operations      
Net income (loss) $ (0.21) $ 0.24
Diluted income (loss) per share of common stock:    
Continuing operations $ (0.21) $ 0.24
Discontinued operations   $ (0.01)
Net income (loss) $ (0.21) $ 0.23
Cash dividends declared per share of common stock $ 0.12 $ 0.12
Basic weighted average shares outstanding: 8,574 8,531
Dilutive effect of stock based compensation   74
Diluted weighted average share outstanding 8,574 8,605
Net comprehensive income (loss) $ (1,371) $ 2,394