Note Q - Earnings Per Share - Components of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Net loss	$ (29,519)	$ (39,571)
Less: Net earnings attributable to noncontrolling interest	(200)	(246)
Less: Undistributed earnings attributable to unvested shares	0	0
Net loss available to Twin Disc shareholders	$ (29,719)	$ (39,817)
Weighted average shares outstanding - basic (in shares)	13,247	13,153
Basic loss per share attributable to Twin Disc common shareholders (in dollars per share)	$ (2.24)	$ (3.03)
Net loss available to Twin Disc shareholders	$ (29,719)	$ (39,817)
Effect of dilutive stock awards (in shares)	0	0
Weighted average shares outstanding - diluted (in shares)	13,247	13,153
Net loss per share - diluted (in dollars per share)	$ (2.24)	$ (3.03)