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Note 17 - Financial Instruments (Tables) | 12 Months Ended
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Jun. 30, 2015
Notes Tables |
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] |
June 30, 2015 |
|  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Balance |
Cash equivalents |  | $ | 84,192 |  |  | $ | - |  |  | $ | - |  |  | $ | 84,192 |
Available-for-sale securities |  |  | - |  |  |  | 2,198 |  |  |  | - |  |  |  | 2,198 |
Total |  | $ | 84,192 |  |  | $ | 2,198 |  |  | $ | - |  |  | $ | 86,390 |
June 30, 2014 |
|  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Balance |
Cash equivalents |  | $ | 117,683 |  |  | $ | - |  |  | $ | - |  |  | $ | 117,683 |
Available-for-sale securities |  |  | - |  |  |  | 18,153 |  |  |  | - |  |  |  | 18,153 |
Total |  | $ | 117,683 |  |  | $ | 18,153 |  |  | $ | - |  |  | $ | 135,836 |
Schedule of Available-for-sale Securities Reconciliation [Table Text Block] |
|  | Amortized |  |  | Fair |
|  | Cost Basis |  |  | Value |
2015 |  | $ | 2,155 |  |  | $ | 2,198 |
2014 |  | $ | 17,909 |  |  | $ | 18,153 |
Available-for-sale Securities [Table Text Block] |
June 30, 2015 |
|  |  |  |  |  | Estimated |
|  | Cost |  |  | Fair Value |
Due in one year or less |  | $ | 2,296 |  |  | $ | 2,198 |
Due after one year through five years |  | $ | - |  |  | $ | - |
June 30, 2014 |
|  |  |  |  |  | Estimated |
|  | Cost |  |  | Fair Value |
Due in one year or less |  | $ | 16,049 |  |  | $ | 15,863 |
Due after one year through five years |  | $ | 2,296 |  |  | $ | 2,290 |

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- Definition Tabular disclosure of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62557-112803 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27337-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27198-111563 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62586-112803 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27161-111563 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27357-111563 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27290-111563 + Details
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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: 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=36462937&loc=d3e19190-110258 + Details
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