Note H - Employee Benefit Plans - Defined Benefit Pension Plan's Funded Status and Amount Recognized (Details) - USD ($)	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Change in Benefit Obligation:
Benefit obligation at beginning of year	$ 2,035,000	$ 1,615,000
Interest cost	39,000	46,000
Actuarial loss	(43,000)	380,000
Benefits paid	(211,000)	(6,000)
Benefit obligation at end of year	1,820,000	2,035,000
Change in Plan Assets:
Fair value of plan assets at beginning of year	1,339,000	1,369,000
Actual return on plan assets	294,000	(24,000)
Defined Benefit Plan, Plan Assets, Contributions by Employer	7,000	0
Benefits paid	(211,000)	(6,000)
Plan expenses
Fair value of plan assets at end of year	1,429,000	1,339,000
Reconciliation of Funded Status:
Difference between benefit obligation and fair value of plan assets	(391,000)	(696,000)
Unrecognized net actuarial loss in accumulated other comprehensive income	626,000	1,087,000
Net amount recognized	235,000	391,000
Projected benefit obligation	1,820,000	2,035,000
Accumulated benefit obligation	1,820,000	2,035,000
Fair value of plan assets	$ 1,429,000	$ 1,339,000