Note 3 - Cash, Cash Equivalents, and Investments (Tables) |
3 Months Ended | ||||||||||||||||||||||||||||||||||||
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Dec. 31, 2021 | |||||||||||||||||||||||||||||||||||||
| Notes Tables | |||||||||||||||||||||||||||||||||||||
| Investments Classified by Contractual Maturity Date [Table Text Block] |
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| X | ||||||||||
- Definition Tabular disclosure of maturities of an entity's investments as well as any other information pertinent to the investments. No definition available.
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| X | ||||||||||
- References No definition available.
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