Note I - Supplemental Cash Flow Information (Details Textual) - USD ($)	3 Months Ended
Jun. 30, 2018	Jun. 30, 2017
Income Taxes Paid	$ 0	$ 8,000
Interest Paid, Excluding Capitalized Interest, Operating Activities	0	0
Dividends Payable	$ 210,283	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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The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income.

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