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Note 3 - Cash, Cash Equivalents and Investments - Maturity Date of CDs (Details) - USD ($)	Dec. 31, 2018	Sep. 30, 2018
Less than one year	$ 8,490,225	$ 8,930,225
1-5 years	18,292,000	17,974,000
Total	$ 26,782,225	$ 26,904,225

X

- Definition

Amount of investment in debt security measured at amortized cost (held-to-maturity).

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- Definition

Amount of investment in debt security measured at amortized cost (held-to-maturity), with single maturity date and allocated without single maturity date, maturing in next fiscal year through fifth fiscal year following latest fiscal year. Excludes interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.

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Amount of investment in debt security measured at amortized cost (held-to-maturity), with single maturity date and allocated without single maturity date, maturing in next fiscal year following latest fiscal year. Excludes interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.

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