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Quarterly Financial Data (Unaudited) (Tables) | 12 Months Ended
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Mar. 31, 2013
Quarterly Financial Data [Abstract] |
Summary of the Company's unaudited quarterly results |
Year ended March 31, 2013 |  | First Quarter |  |  | Second Quarter |  |  | Third Quarter |  |  | Fourth Quarter |  |  | Total Year |
Net sales |  | $ | 22,533 |  |  | $ | 25,902 |  |  | $ | 25,633 |  |  | $ | 30,905 |  |  | $ | 104,973 |
Gross profit |  |  | 6,236 |  |  |  | 7,913 |  |  |  | 7,128 |  |  |  | 10,545 |  |  |  | 31,822 |
Net income |  |  | 1,390 |  |  |  | 2,615 |  |  |  | 3,047 |  |  |  | 4,096 |  |  |  | 11,148 |
Per share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | .14 |  |  | $ | .26 |  |  | $ | .30 |  |  | $ | .41 |  |  | $ | 1.11 |
Diluted |  | $ | .14 |  |  | $ | .26 |  |  | $ | .30 |  |  | $ | .41 |  |  | $ | 1.11 |
Market price range of common stock |  | $ | 17.02-23.13 |  |  | $ | 16.20-$20.00 |  |  | $ | 16.45-21.22 |  |  | $ | 19.60-24.80 |  |  | $ | 16.20-24.80 |
Year ended March 31, 2012 |  | First Quarter |  |  | Second Quarter |  |  | Third Quarter |  |  | Fourth Quarter |  |  | Total Year |
Net sales |  | $ | 25,012 |  |  | $ | 33,595 |  |  | $ | 24,329 |  |  | $ | 20,250 |  |  | $ | 103,186 |
Gross profit |  |  | 8,197 |  |  |  | 12,800 |  |  |  | 6,462 |  |  |  | 5,176 |  |  |  | 32,635 |
Net income |  |  | 3,016 |  |  |  | 5,468 |  |  |  | 1,640 |  |  |  | 429 |  |  |  | 10,553 |
Per share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | .30 |  |  | $ | .55 |  |  | $ | .16 |  |  | $ | .04 |  |  | $ | 1.06 |
Diluted |  | $ | .30 |  |  | $ | .55 |  |  | $ | .16 |  |  | $ | .04 |  |  | $ | 1.06 |
Market price range of common stock |  | $ | 17.74-26.30 |  |  | $ | 15.00-21.24 |  |  | $ | 14.36-24.98 |  |  | $ | 19.26-25.04 |  |  | $ | 14.36-26.30 |

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- Definition Tabular disclosure of the quarterly financial data in the annual financial statements. The disclosure includes financial information for each fiscal quarter for the current and previous year, including revenues, gross profit, income (loss) before extraordinary items and cumulative effect of a change in accounting principle and earnings per share data. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a)-(j) -URI http://asc.fasb.org/extlink&oid=20225539&loc=d3e1280-108306 + Details
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