Note M - Earnings Per Share - Components of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Sep. 24, 2021	Sep. 25, 2020	Sep. 24, 2020
Net income (loss)	$ 1,980	$ (3,937)	$ (3,937)
Less: Net earnings attributable to noncontrolling interest	(60)	(42)
Less: Undistributed earnings attributable to unvested shares	0	0
Net income (loss) available to Twin Disc shareholders	$ 1,920	$ (3,979)
Weighted average shares outstanding - basic (in shares)	13,283	13,197
Basic income (loss) per share attributable to Twin Disc common shareholders (in dollars per share)	$ 0.14	$ (0.30)
Net income (loss) available to Twin Disc shareholders	$ 1,920	$ (3,979)
Effect of dilutive stock awards (in shares)	67	0
Weighted average shares outstanding - diluted (in shares)	13,350	13,197
Net income (loss) per share - diluted (in dollars per share)	$ 0.14	$ (0.30)