Note L - Stockholders' Equity (Details Textual) - USD ($)	3 Months Ended
Sep. 30, 2020	Jun. 25, 2020
Stock Repurchase Program, Number of Shares Authorized to be Repurchased (in shares)		1,062,067
Stock Repurchase Program, Percentage of Total Outstanding Shares of Common Stock		15.00%
Treasury Stock, Shares, Acquired (in shares)	67,281
Treasury Stock, Value, Acquired, Cost Method	$ 410,221

Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

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