Note H - Stockholders' Equity - Stock Option Activity (Details) - USD ($)	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Exercised (in shares)	0	0
Granted (in shares)	0	0
The 2009 Omnibus Stock Incentive Plan [Member]
Vested and exercisable (in shares)	140,000
Vested and exercisable, weighted average exercise price (in dollars per share)	$ 6.36
Exercised (in shares)
Exercised, weighted average exercise price (in dollars per share)
Forfeited (in shares)	(5,000)
Forfeited, weighted average exercise price (in dollars per share)	$ 7.50
Granted (in shares)
Granted, weighted average exercise price (in dollars per share)
Outstanding (in shares)	135,000
Outstanding, weighted average exercise price (in dollars per share)	$ 6.32
Outstanding, weighted average contractual term (Year)	2 years 211 days
Outstanding, aggregate intrinsic value	$ 516,760
Vested and exercisable (in shares)	135,000	140,000
Vested and exercisable, weighted average exercise price (in dollars per share)	$ 6.32	$ 6.36
Vested and exercisable, weighted average contractual term (Year)	2 years 211 days
Vested and exercisable, aggregate intrinsic value	$ 516,760