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Summary of Unaudited Quarterly Results of Operations Summary of Unaudited Quarterly Results of Operations (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Selected Quarterly Financial Information [Abstract]                      
Net sales $ 64,961 $ 70,243 $ 70,726 $ 69,904 $ 70,281 $ 74,128 $ 72,080 $ 69,204 $ 275,834 $ 285,693 $ 269,503
Gross profit 39,091 43,342 43,808 42,883 42,935 44,533 43,803 41,278 169,124 172,549 161,295
Income (loss) from continuing operations (3,688) 2,430 [1] 2,926 [1] (1,371) [1] (2,997) [2] 460 [2] 798 [2] (4,322) [2] 297 (6,061) (6,981)
Income (loss) from discontinued operations 0 0 0 0 325 0 0 1,367 0 1,692 1,861
Net income (loss) $ (3,688) $ 2,430 $ 2,926 $ (1,371) $ (2,672) $ 460 $ 798 $ (2,955) $ 297 $ (4,369) $ (5,120)
Income (Loss) from Continuing Operations, Per Basic Share $ (0.42) $ 0.28 $ 0.34 $ (0.16)              
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share 0.00 0.00 0.00 0.00              
Earnings Per Share, Basic (0.42) 0.28 0.34 (0.16)              
Income (Loss) from Continuing Operations, Per Diluted Share (0.42) 0.27 0.33 $ (0.16)         $ 0.03 $ (0.70) $ (0.81)
Loss from Continuing Operations, Per Basic and Diluted Share         $ (0.34) $ 0.05 $ 0.09 $ (0.50)      
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic and Diluted Share         0.03 0.00 0.00 0.16      
Earnings Per Share, Basic and Diluted         $ (0.31) $ 0.05 $ 0.09 $ (0.34)      
Other Disclosures [Abstract]                      
Impairment of long-lived assets       $ 2,900         $ 0 $ 3,046 $ 0
Loss on sub-lease                 $ 0 $ 0 $ 2,928
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share 0.00 0.00 0.00 $ 0.00         $ 0.00 $ 0.20 $ 0.22
Earnings Per Share, Diluted $ (0.42) $ 0.27 $ 0.33 $ (0.16)         $ 0.03 $ (0.50) $ (0.59)
[1] Loss from continuing operations for the three months ended March 31, 2014 includes a $2.9 million impairment charge related to the Reno, Nevada distribution center.
[2] )Loss from continuing operations for the three months ended March 31, 2014 includes a $2.9 million impairment charge related to the Reno, Nevada distribution center.