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Note 2 - Business Segment Information (Details) - Revenue by Geographic Region - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
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Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2012 | Sep. 30, 2012 | Jun. 30, 2015 | Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2011
Net Sales (a): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  | $ 76,073 | $ 68,603 | $ 84,715 | $ 78,466 | $ 73,858 | $ 68,996 | $ 76,123 | $ 80,486 | $ 68,837 | $ 66,152 | $ 71,082 | $ 74,719 | $ 307,857 | [1] | $ 299,463 | [1] | $ 280,790 | [1] | $ 268,402 | $ 293,501
UNITED STATES |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net Sales (a): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales | [1] |  |  |  |  |  |  |  |  |  |  |  |  | 307,816 |  | 298,089 |  | 279,818 |  |  |
CANADA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net Sales (a): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales | [1] |  |  |  |  |  |  |  |  |  |  |  |  | $ 41 |  | $ 1,374 |  | $ 972 |  |  |
[1] | Net sales are attributed to geographic areas based upon the location of the operation making the sale.

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- Definition Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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