Note K - Earnings Per Share - Earnings Per Share (Details) - USD ($)	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Net (Loss) Income	$ (255,727)	$ 12,378
Dividend requirements on preferred stock	(17,710)	13,315
Numerator for basic earnings per share-Net income available to common stockholders	(273,437)	25,693
Numerator for diluted earnings per share- Net income available to common stockholder	$ (273,437)	$ 25,693
Weighted average number of common shares outstanding (in shares)	8,077,388	8,062,536
Stock options (in shares)		40,068
Weighted-average Dilutive potential common shares (in shares)		177,100
Denominator for dilutive earnings per share-Adjusted weighted-average shares and assumed conversions (in shares)	8,077,388	8,279,704
Basic net (loss) income per common share (in dollars per share)	$ (0.03)	$ 0
Diluted net (loss) income per common share (in dollars per share)	$ (0.03)	$ 0