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Note J - Economic Dependency - Substantial Net Sales to Certain Customers (Details) - USD ($) $ in Thousands | 12 Months Ended
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Jun. 30, 2017 | Jun. 30, 2016
Net sales | $ 121,946 |  | $ 114,201
Customer Concentration Risk [Member] | Sales Revenue, Goods, Net [Member] |  |  |
Net sales | 60,532 |  | 63,394
Customer Concentration Risk [Member] | Sales Revenue, Goods, Net [Member] | Customer 1 [Member] |  |  |
Net sales | 60,532 |  | 49,442
Customer Concentration Risk [Member] | Sales Revenue, Goods, Net [Member] | Customer 2 [Member] |  |  |
Net sales |  | [1] | $ 13,952
[1] | Sales were less than 10% of the respective period's consolidated net sales.

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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=63488584&loc=d3e20235-122688 + Details
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