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Note 12 - Fair Value Measurements (Tables) | 9 Months Ended
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Mar. 31, 2014
Fair Value Disclosures [Abstract] |
Fair Value Measurements, Recurring and Nonrecurring [Table Text Block] |
March 31, 2014 |
|  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Balance |
Cash equivalents |  | $ | 104,711 |  |  | $ | - |  |  | $ | - |  |  | $ | 104,711 |
Available-for-sale securities |  |  | - |  |  |  | 20,138 |  |  |  | - |  |  |  | 20,138 |
Total |  | $ | 104,711 |  |  | $ | 20,138 |  |  | $ | - |  |  | $ | 124,849 |
June 30, 2013 |
|  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Balance |
Cash equivalents |  | $ | 88,034 |  |  | $ | - |  |  | $ | - |  |  | $ | 88,034 |
Available-for-sale securities |  |  | - |  |  |  | 15,529 |  |  |  | - |  |  |  | 15,529 |
Total |  | $ | 88,034 |  |  | $ | 15,529 |  |  | $ | - |  |  | $ | 103,563 |
Investments Classified by Contractual Maturity Date [Table Text Block] |
March 31, 2014 |
|  | Cost |  |  | Estimated Fair Value |
Due in one year or less |  | $ | 14,411 |  |  | $ | 14,304 |
Due after one year through five years |  | $ | 5,823 |  |  | $ | 5,834 |
June 30, 2013 |
|  | Cost |  |  | Estimated Fair Value |
Due in one year or less |  | $ | 13,213 |  |  | $ | 13,067 |
Due after one year through five years |  | $ | 2,463 |  |  | $ | 2,462 |

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- Definition Tabular disclosure of financial instruments measured at fair value, including those classified in shareholders' equity measured on a recurring or nonrecurring basis. Disclosures include, but are not limited to, fair value measurements recorded and the reasons for the measurements, level within the fair value hierarchy in which the fair value measurements are categorized and transfers between levels 1 and 2. Nonrecurring fair value measurements are those that are required or permitted in the statement of financial position in particular circumstances. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a,b,bb) -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2C -URI http://asc.fasb.org/extlink&oid=25499696&loc=SL7498348-110258 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19279-110258 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19190-110258 + Details
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- Definition Tabular disclosure of maturities of an entity's investments as well as any other information pertinent to the investments. + References No definition available. + Details
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