Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2022	Jun. 30, 2022
Statement of Financial Position [Abstract]
Accounts receivable, net of allowance for doubtful accounts	$ 1.7	$ 1.6
Preferred stock, par value	$ 1.00	$ 1.00
Preferred stock, shares authorized	200,000	200,000
Preferred stock, shares issued
Preferred stock, shares outstanding
Common stock, par value	$ 0.025	$ 0.025
Common stock, shares authorized	20,000,000	20,000,000
Common stock, shares issued	12,650,126	12,650,126
Treasury stock, shares	127,801	127,801