Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2022	Jun. 30, 2021
Consolidated Balance Sheets [Abstract]
Trade receivables, allowance for doubtful accounts	$ 2,980	$ 3,240
Common stock, par value	$ 1	$ 1
Common stock, authorized	15,000,000	15,000,000
Common stock, issued	8,190,000	8,133,000
Common stock, outstanding	5,300,000	6,848,000
Treasury stock, shares	2,890,453	1,284,000