Note K - Business Segments and Foreign Operations - Segment Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Net Sales	$ 340,738	$ 295,127
Intra-segment sales	0	0
Inter-segment sales	0	0
Total consolidated net sales	340,738	295,127
Cost of goods sold	419,548	421,260
Intra-segment cost of goods sold	(56,512)	(45,270)
Inter-segment cost of goods sold	(115,024)	(164,182)
Total consolidated cost of goods sold	248,012	211,808
Gross profit	92,726	83,319
Marketing, engineering and administrative expenses	82,431	71,622
Restructuring expenses	408	218
Income from operations	9,887	11,479
Interest income	(67)	(64)
Interest expense	2,646	1,443
Other (income) expense	5,539	(5,267)
Total consolidated other (income) expense	8,118	(3,888)
Pretax earnings (loss)	1,769	15,367
Income tax expense (benefit)	3,368	4,121
Net (loss) income	(1,599)	11,246
Minority interest	(295)	(258)
Net (loss) income attributable to Twin Disc, Incorporated	(1,894)	10,988
Total consolidated assets	355,562	312,058
Depreciation and amortization	14,899	9,981
Expenditures for segment assets	15,157	8,707
Operating Segments [Member] | Manufacturing Segment [Member]
Net Sales	295,550	250,934
Intra-segment sales	(7,213)	(6,974)
Inter-segment sales	(52,691)	(77,978)
Total consolidated net sales	235,646	165,982
Cost of goods sold	229,807	196,140
Intra-segment cost of goods sold	(7,213)	(6,974)
Inter-segment cost of goods sold	(52,691)	(77,978)
Total consolidated cost of goods sold	169,903	111,188
Gross profit	65,743	54,794
Marketing, engineering and administrative expenses	41,388	31,801
Restructuring expenses	252	149
Income from operations	24,103	22,844
Interest income	(1,045)	(335)
Interest expense	5,900	1,987
Other (income) expense	14,725	(4,285)
Total consolidated other (income) expense	19,580	(2,633)
Pretax earnings (loss)	4,523	25,477
Income tax expense (benefit)	1,476	1,244
Net (loss) income	3,047	24,233
Minority interest	0	0
Net (loss) income attributable to Twin Disc, Incorporated	3,047	24,233
Total consolidated assets	487,114	456,731
Depreciation and amortization	13,282	8,606
Expenditures for segment assets	11,590	7,304
Operating Segments [Member] | Distribution Segment [Member]
Net Sales	130,956	148,919
Intra-segment sales	(21,043)	(15,661)
Inter-segment sales	(4,821)	(4,113)
Total consolidated net sales	105,092	129,145
Cost of goods sold	104,165	122,505
Intra-segment cost of goods sold	(21,043)	(15,661)
Inter-segment cost of goods sold	(4,821)	(4,113)
Total consolidated cost of goods sold	78,301	102,731
Gross profit	26,791	26,414
Marketing, engineering and administrative expenses	14,796	15,340
Restructuring expenses	93	41
Income from operations	11,902	11,033
Interest income	(550)	(344)
Interest expense	7	11
Other (income) expense	6,537	1,341
Total consolidated other (income) expense	5,994	1,008
Pretax earnings (loss)	5,908	10,025
Income tax expense (benefit)	2,151	2,164
Net (loss) income	3,757	7,861
Minority interest	(295)	(258)
Net (loss) income attributable to Twin Disc, Incorporated	3,462	7,603
Total consolidated assets	66,087	58,351
Depreciation and amortization	353	341
Expenditures for segment assets	1,902	730
Segment Reporting, Reconciling Item, Corporate Nonsegment [Member]
Net Sales	0	0
Intra-segment sales	0	0
Inter-segment sales	0	0
Total consolidated net sales	0	0
Cost of goods sold	0	0
Intra-segment cost of goods sold	0	0
Inter-segment cost of goods sold	0	0
Total consolidated cost of goods sold	0	0
Gross profit	0	0
Marketing, engineering and administrative expenses	26,247	24,481
Restructuring expenses	63	28
Income from operations	(26,310)	(24,509)
Interest income	(1,801)	0
Interest expense	68	60
Other (income) expense	(15,818)	(3,812)
Total consolidated other (income) expense	(17,551)	(3,752)
Pretax earnings (loss)	(8,759)	(20,757)
Income tax expense (benefit)	(228)	311
Net (loss) income	(8,531)	(21,068)
Minority interest	0	0
Net (loss) income attributable to Twin Disc, Incorporated	(8,531)	(21,068)
Total consolidated assets	(186,291)	(194,730)
Depreciation and amortization	1,264	1,034
Expenditures for segment assets	1,665	673
Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment [Member]
Net Sales	(85,768)	(104,726)
Intra-segment sales	28,256	22,635
Inter-segment sales	57,512	82,091
Total consolidated net sales	0	0
Cost of goods sold	85,576	102,615
Intra-segment cost of goods sold	(28,256)	(22,635)
Inter-segment cost of goods sold	(57,512)	(82,091)
Total consolidated cost of goods sold	(192)	(2,111)
Gross profit	192	2,111
Marketing, engineering and administrative expenses	0	0
Restructuring expenses	0	0
Income from operations	192	2,111
Interest income	3,329	615
Interest expense	(3,329)	(615)
Other (income) expense	95	1,489
Total consolidated other (income) expense	95	1,489
Pretax earnings (loss)	97	622
Income tax expense (benefit)	(31)	402
Net (loss) income	128	220
Minority interest	0	0
Net (loss) income attributable to Twin Disc, Incorporated	128	220
Total consolidated assets	(11,348)	(8,296)
Depreciation and amortization	0	0
Expenditures for segment assets	$ 0	$ 0