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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
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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.

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