Note I - Supplemental Cash Flow Information (Details Textual) - USD ($)	3 Months Ended	6 Months Ended
Jun. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Income Taxes Paid		$ 721,000	$ 8,000
Interest Paid, Excluding Capitalized Interest, Operating Activities	$ 0	15,753	0
Dividends Payable		$ 630,850	70,094
Other Significant Noncash Transaction, Value of Consideration Given			$ 246,000

Carrying value as of the balance sheet date of dividends declared but unpaid on equity securities issued by the entity and outstanding.

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