Note G - Supplemental Cash Flow Information (Details Textual) - USD ($)	3 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Mar. 31, 2017
Income Taxes Paid	$ 8,000	$ 13,500
Interest Paid, Net	0	0
Dividends Payable, Current	70,094	67,994	$ 70,094
Other Significant Noncash Transaction, Value of Consideration Given	$ 246,000	$ 293,000