Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2020	Jun. 30, 2019
Statement of Financial Position [Abstract]
Accounts receivable, allowances	$ 905	$ 923
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	60,000,000	60,000,000
Common stock, shares issued	27,888,217	27,888,217
Common stock, shares outstanding	26,141,528	26,807,203
Treasury stock, shares	1,746,689	1,081,014