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				6 Months Ended
	Dec. 31, 2021	Sep. 24, 2021	Dec. 25, 2020	Sep. 25, 2020	Dec. 31, 2021	Dec. 25, 2020
Net loss	$ (3,750)	$ 1,980	$ (4,280)	$ (3,937)	$ (1,770)	$ (8,217)
Less: Net earnings attributable to noncontrolling interest, net of tax	(86)		(33)		(144)	(75)
Less: Undistributed earnings attributable to unvested shares	0		0		0	0
Net (loss) income attributable to Twin Disc	$ (3,836)		$ (4,313)		$ (1,914)	$ (8,292)
Weighted average shares outstanding - basic (in shares)	13,296		13,255		13,288	13,227
Basic loss per share attributable to Twin Disc common shareholders (in dollars per share)	$ (0.29)		$ (0.33)		$ (0.14)	$ (0.63)
Net loss	$ (3,750)	$ 1,980	$ (4,280)	$ (3,937)	$ (1,770)	$ (8,217)
Net (loss) income attributable to Twin Disc	$ (3,836)		$ (4,313)		$ (1,914)	$ (8,292)
Effect of dilutive stock awards (in shares)	0		0		0	0
Weighted average shares outstanding - diluted (in shares)	13,296		13,255		13,288	13,227
Diluted loss per share attributable to Twin Disc common shareholders (in dollars per share)	$ (0.29)		$ (0.33)		$ (0.14)	$ (0.63)