Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2022	Jun. 30, 2021
Condensed Consolidated Balance Sheets [Abstract]
Property, plant and equipment, accumulated depreciation	$ 37,708	$ 38,535
Common stock, shares authorized	200,000,000	200,000,000
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares issued	57,921,062	56,716,620
Common stock, shares outstanding	57,921,062	56,716,620
Preferred stock, shares authorized	50,000,000	50,000,000
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Treasury shares, shares outstanding	24,891,292	24,891,292