Note 3 - Cash, Cash Equivalents and Investments (Details Textual) |
3 Months Ended |
|---|---|
Dec. 31, 2017 | |
| Maximum [Member] | |
| Held-to-maturity Securities, Investment Term | 5 years |
| X | ||||||||||
- Definition Represents information about the Company's investment term in money market accounts and bank certificates of deposit. No definition available.
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| X | ||||||||||
- Details
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