Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2020	Jun. 30, 2020
Statement of Financial Position [Abstract]
Accounts receivable, net of allowance for doubtful accounts	$ 931	$ 820
Preferred stock, par value	$ 1.00	$ 1.00
Preferred stock, shares authorized	200,000	200,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.025	$ 0.025
Common stock, shares authorized	20,000,000	20,000,000
Common stock, shares issued	12,340,591	12,029,910
Treasury stock, shares	105,635	95,396