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Quarterly Results (Unaudited) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified | 3 Months Ended | 12 Months Ended
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Jan. 31, 2015 | Oct. 31, 2014 | Jul. 31, 2014 | Apr. 30, 2014 | Jan. 31, 2014 | Oct. 31, 2013 | Jul. 31, 2013 | Apr. 30, 2013 | Jan. 31, 2015 | Jan. 31, 2014 | Jan. 31, 2013
Quarterly Financial Information Disclosure [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales | $ 25,354 us-gaap_SalesRevenueGoodsNet | [1] | $ 62,273 us-gaap_SalesRevenueGoodsNet | [1] | $ 53,042 us-gaap_SalesRevenueGoodsNet | [1] | $ 23,383 us-gaap_SalesRevenueGoodsNet | [1] | $ 19,480 us-gaap_SalesRevenueGoodsNet | [1] | $ 59,055 us-gaap_SalesRevenueGoodsNet | [1] | $ 56,794 us-gaap_SalesRevenueGoodsNet | [1] | $ 19,713 us-gaap_SalesRevenueGoodsNet | [1] | $ 164,052 us-gaap_SalesRevenueGoodsNet |  | $ 155,042 us-gaap_SalesRevenueGoodsNet |  | $ 157,913 us-gaap_SalesRevenueGoodsNet |
Gross profit | 6,000 us-gaap_GrossProfit | [1] | 20,672 us-gaap_GrossProfit | [1] | 20,696 us-gaap_GrossProfit | [1] | 8,030 us-gaap_GrossProfit | [1] | 4,113 us-gaap_GrossProfit | [1] | 20,762 us-gaap_GrossProfit | [1] | 21,447 us-gaap_GrossProfit | [1] | 6,232 us-gaap_GrossProfit | [1] | 55,398 us-gaap_GrossProfit |  | 52,554 us-gaap_GrossProfit |  | 50,609 us-gaap_GrossProfit |
Net income (loss) | $ (5,131)us-gaap_NetIncomeLoss |  | $ 4,632 us-gaap_NetIncomeLoss |  | $ 5,203 us-gaap_NetIncomeLoss |  | $ (3,855)us-gaap_NetIncomeLoss |  | $ (6,901)us-gaap_NetIncomeLoss |  | $ 3,408 us-gaap_NetIncomeLoss |  | $ 6,210 us-gaap_NetIncomeLoss |  | $ (4,447)us-gaap_NetIncomeLoss |  | $ 849 us-gaap_NetIncomeLoss |  | $ (1,730)us-gaap_NetIncomeLoss |  | $ (3,830)us-gaap_NetIncomeLoss |
Per common share |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic (dollar per share) | $ (0.35)us-gaap_EarningsPerShareBasic | [2] | $ 0.31 us-gaap_EarningsPerShareBasic | [2] | $ 0.35 us-gaap_EarningsPerShareBasic | [2] | $ (0.26)us-gaap_EarningsPerShareBasic | [2] | $ (0.47)us-gaap_EarningsPerShareBasic | [2] | $ 0.23 us-gaap_EarningsPerShareBasic | [2] | $ 0.43 us-gaap_EarningsPerShareBasic | [2] | $ (0.31)us-gaap_EarningsPerShareBasic | [2] | $ 0.06 us-gaap_EarningsPerShareBasic | [3] | $ (0.12)us-gaap_EarningsPerShareBasic | [3] | $ (0.27)us-gaap_EarningsPerShareBasic | [3]
Assuming dilution (dollar per share) | $ (0.35)us-gaap_EarningsPerShareDiluted | [2] | $ 0.31 us-gaap_EarningsPerShareDiluted | [2] | $ 0.35 us-gaap_EarningsPerShareDiluted | [2] | $ (0.26)us-gaap_EarningsPerShareDiluted | [2] | $ (0.47)us-gaap_EarningsPerShareDiluted | [2] | $ 0.23 us-gaap_EarningsPerShareDiluted | [2] | $ 0.42 us-gaap_EarningsPerShareDiluted | [2] | $ (0.31)us-gaap_EarningsPerShareDiluted | [2] | $ 0.06 us-gaap_EarningsPerShareDiluted | [3] | $ (0.12)us-gaap_EarningsPerShareDiluted | [3] | $ (0.27)us-gaap_EarningsPerShareDiluted | [3]
[1] | The Company revised the presentation of previously reported amounts to be consistent with the presentation for the year ended January 31, 2015. The changes resulted in decreases to net sales, gross margin and selling, general, and administrative expenses for the quarters ended January 31, 2015 and 2014, respectively.
[2] | Net loss per share was calculated based on basic shares outstanding due to the anti-dilutive effect on the inclusion of common stock equivalent shares.
[3] | Net loss per share for fiscal years 2013 and 2012 were calculated based on basic shares outstanding due to the anti-dilutive effect on the inclusion of common stock equivalent shares.

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