Note P - Impact of Accounting Method Change - Adjustment to Financial Statements (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended				6 Months Ended
	Dec. 29, 2023	Sep. 29, 2023	Dec. 30, 2022	Sep. 30, 2022	Dec. 29, 2023	Dec. 30, 2022	Jun. 30, 2023	Jul. 01, 2022
Net sales	$ 72,994		$ 63,351		$ 136,547	$ 119,264
Gross profit	20,656		17,023		37,292	30,320
Marketing, engineering and administrative expenses	17,149		15,983		34,068	31,063
Restructuring expenses	69		164		68	174
Other operating income	0		(4,150)		0	(4,150)
Income from operations	3,438		5,026		3,156	3,233
Other expense (income):
Interest expense	392		594		786	1,160
Other expense (income), net	449		182		310	(164)
Interest Income (Expense), Nonoperating, Net	841		776		1,096	996
Income before income taxes and noncontrolling interest	2,597		4,250		2,061	2,237
Income tax expense	1,662		2,489		2,208	1,801
Net (loss) income	935	$ (1,083)	1,761	$ (1,324)	(148)	436
Less: Net earnings attributable to noncontrolling interest, net of tax	(5)		(15)		(95)	(112)
Net income (loss) attributable to Twin Disc	$ 930		$ 1,746		$ (243)	$ 324
Income (loss) per share data:
Basic income (loss) per share attributable to Twin Disc common shareholders (in dollars per share)	$ 0.07		$ 0.13		$ (0.02)	$ 0.02
Diluted income (loss) per share attributable to Twin Disc common shareholders (in dollars per share)	$ 0.07		$ 0.13		$ (0.02)	$ 0.02
Weighted average shares outstanding data:
Basic shares outstanding (in shares)	13,718		13,460		13,629	13,434
Diluted shares outstanding (in shares)	13,923		13,699		13,629	13,649
Net (loss) income	$ 935	(1,083)	$ 1,761	(1,324)	$ (148)	$ 436
Benefit plan adjustments, net of income taxes of $13, $13, $8 and $4, respectively	(108)	(171)	(1,122)	(89)	(279)	(1,211)
Translation adjustment during the quarter	5,190	(3,036)	8,392	(6,290)	2,154	2,102
Unrealized (loss) gain on hedges, net of income taxes of $0, $0, $0 and $0, respectively	(485)	216	(595)	793	(269)	198
Comprehensive income	5,532		8,436		1,458	1,525
Less: Comprehensive income attributable to noncontrolling interest	40		74		190	210
Comprehensive income attributable to Twin Disc	5,492		8,362		1,268	1,315
Current assets:
Cash	21,021		13,528		21,021	13,528	$ 13,263
Trade accounts receivable, net	41,428		39,392		41,428	39,392	54,760
Inventories	131,768		136,810		131,768	136,810	131,930
Assets held for sale	2,968		2,968		2,968	2,968	2,968
Prepaid expenses	10,157		10,871		10,157	10,871	8,459
Other	9,235		7,228		9,235	7,228	8,326
Total current assets	216,577		210,797		216,577	210,797	219,706
Property, plant and equipment, net	40,334		39,683		40,334	39,683	38,650
Right-of-use assets operating leases	12,017		12,807		12,017	12,807	13,133
Intangible assets, net	11,146		11,798		11,146	11,798	12,637
Deferred income taxes	2,371		2,403		2,371	2,403	2,244
Other assets	2,745		2,766		2,745	2,766	2,811
Total assets	285,190		280,254		285,190	280,254	289,181
Current liabilities:
Current maturities of long-term debt	2,000		2,000		2,000	2,000	2,010
Accounts payable	32,611		28,906		32,611	28,906	36,499
Accrued liabilities	62,929		55,939		62,929	55,939	61,586
Total current liabilities	97,540		86,845		97,540	86,845	100,095
Long-term debt	15,698		29,927		15,698	29,927	16,617
Lease obligations	9,988		10,278		9,988	10,278	10,811
Accrued retirement benefits	6,975		10,587		6,975	10,587	7,608
Deferred income taxes	3,162		3,506		3,162	3,506	3,280
Other long-term liabilities	5,917		5,346		5,917	5,346	5,253
Total liabilities	139,280		146,489		139,280	146,489	143,664
Twin Disc shareholders' equity:
Preferred shares authorized: 200,000; issued: none; no par value	0		0		0	0	0
Common shares authorized: 30,000,000; issued: 14,632,802; no par value	39,661		41,444		39,661	41,444	42,855
Retained earnings	119,496		110,243		119,496	110,243	120,299
Accumulated Other Comprehensive Income (Loss), Net of Tax	(4,059)		(5,982)		(4,059)	(5,982)	(5,570)
Equity before treasury stock	155,098		145,705		155,098	145,705	157,584
Less treasury stock, at cost (639,006 and 814,734 shares, respectively)	9,802		12,562		9,802	12,562	12,491
Total Twin Disc shareholders' equity	145,296		133,143		145,296	133,143	145,093
Noncontrolling interest	614		622		614	622	424
Total equity	145,910	140,175	133,765	124,768	145,910	133,765	145,517
Total liabilities and equity	285,190		280,254		285,190	280,254	289,181
CASH FLOWS FROM OPERATING ACTIVITIES:
Net (loss) income	935	(1,083)	1,761	(1,324)	(148)	436
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation and amortization					5,023	4,266
Gain on sale of assets					(42)	(4,203)
Provision for deferred income taxes					280	(1,105)
Stock compensation expense and other non-cash changes, net					1,413	1,565
Net change in operating assets and liabilities					6,422	(927)
Net cash provided by operating activities					16,047	32
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisition of property, plant, and equipment					(5,419)	(4,734)
Proceeds from sale of fixed assets					0	7,152
Proceeds on note receivable						0
Other, net					(252)	385
Net cash (used) provided by investing activities					(5,671)	2,803
CASH FLOWS FROM FINANCING ACTIVITIES:
Borrowings under revolving loan arrangements					50,632	42,898
Repayments of revolving loan arrangements					(50,632)	(46,628)
Repayments of other long-term debt					(1,010)	(707)
Payments of finance lease obligations	(207)		(67)		(471)	(132)
Payments of withholding taxes on stock compensation					(1,772)	(463)
Net cash used by financing activities					(3,813)	(5,032)
Effect of exchange rate changes on cash					1,195	3,204
Net change in cash					7,758	1,007
Cash:
Beginning of period		13,263		12,521	13,263	12,521
End of period	21,021		13,528		21,021	13,528
Balance	140,175	145,517	124,768	131,188	145,517	131,188
Net income (loss) attributable to Twin Disc	930		1,746		(243)	324
Balance	145,910	140,175	133,765	124,768	145,910	133,765
Translation adjustment during the quarter	5,190	(3,036)	8,392	(6,290)	2,154	2,102
Unrealized (loss) gain on hedges, net of income taxes of $0, $0, $0 and $0, respectively	(485)	216	(595)	793	(269)	198
Retained Earnings [Member]
Other expense (income):
Net (loss) income	930	(1,173)	1,746	(1,422)
Net income (loss) attributable to Twin Disc						324
Weighted average shares outstanding data:
Net (loss) income	930	(1,173)	1,746	(1,422)
Twin Disc shareholders' equity:
Total equity	119,496	119,126	110,243	108,497	119,496	110,243	120,299
CASH FLOWS FROM OPERATING ACTIVITIES:
Net (loss) income	930	(1,173)	1,746	(1,422)
Cash:
Balance	119,126	120,299	108,497	109,919	120,299	109,919
Net income (loss) attributable to Twin Disc						324
Balance	119,496	119,126	110,243	108,497	119,496	110,243
AOCI Attributable to Parent [Member]
Weighted average shares outstanding data:
Benefit plan adjustments, net of income taxes of $13, $13, $8 and $4, respectively	(108)	(171)	(1,122)	(89)
Translation adjustment during the quarter	5,155	(3,096)	8,333	(6,328)		2,005
Unrealized (loss) gain on hedges, net of income taxes of $0, $0, $0 and $0, respectively	(485)	216	(595)	793		198
Twin Disc shareholders' equity:
Total equity	(4,059)	(8,621)	(5,982)	(12,598)	(4,059)	(5,982)	$ (5,570)
Cash:
Balance	(8,621)	(5,570)	(12,598)	(6,974)	(5,570)	(6,974)
Balance	(4,059)	(8,621)	(5,982)	(12,598)	$ (4,059)	(5,982)
Translation adjustment during the quarter	5,155	(3,096)	8,333	(6,328)		2,005
Benefit plan adjustments, net of tax						(1,211)
Unrealized (loss) gain on hedges, net of income taxes of $0, $0, $0 and $0, respectively	$ (485)	$ 216	(595)	793		198
Previously Reported [Member]
Net sales			63,351			119,264
Cost of goods sold			46,328			88,944
Gross profit			17,023			30,320
Marketing, engineering and administrative expenses			15,983			31,063
Restructuring expenses			164			174
Other operating income			(4,150)			(4,150)
Income from operations			5,026			3,233
Other expense (income):
Interest expense			594			1,160
Other expense (income), net			789			1,050
Interest Income (Expense), Nonoperating, Net			1,383			2,210
Income before income taxes and noncontrolling interest			3,643			1,023
Income tax expense			2,489			1,801
Net (loss) income			1,154			(778)
Less: Net earnings attributable to noncontrolling interest, net of tax			(15)			(112)
Net income (loss) attributable to Twin Disc			$ 1,139			$ (890)
Income (loss) per share data:
Basic income (loss) per share attributable to Twin Disc common shareholders (in dollars per share)			$ 0.08			$ (0.07)
Diluted income (loss) per share attributable to Twin Disc common shareholders (in dollars per share)			$ 0.08			$ (0.07)
Weighted average shares outstanding data:
Basic shares outstanding (in shares)			13,460			13,434
Diluted shares outstanding (in shares)			13,699			13,434
Net (loss) income			$ 1,154			$ (778)
Benefit plan adjustments, net of income taxes of $13, $13, $8 and $4, respectively			(515)			3
Translation adjustment during the quarter			8,392			2,005
Unrealized (loss) gain on hedges, net of income taxes of $0, $0, $0 and $0, respectively			(595)			198
Comprehensive income			8,436			1,428
Less: Comprehensive income attributable to noncontrolling interest			74			210
Comprehensive income attributable to Twin Disc			8,362			1,218
Current assets:
Cash			13,528			13,528
Trade accounts receivable, net			39,392			39,392
Inventories			136,810			136,810
Assets held for sale			2,968			2,968
Prepaid expenses			10,871			10,871
Other			7,228			7,228
Total current assets			210,797			210,797
Property, plant and equipment, net			39,683			39,683
Right-of-use assets operating leases			12,807			12,807
Intangible assets, net			11,798			11,798
Deferred income taxes			2,403			2,403
Other assets			2,766			2,766
Total assets			280,254			280,254
Current liabilities:
Current maturities of long-term debt			2,000			2,000
Accounts payable			28,906			28,906
Accrued liabilities			55,939			55,939
Total current liabilities			86,845			86,845
Long-term debt			29,927			29,927
Lease obligations			10,278			10,278
Accrued retirement benefits			10,587			10,587
Deferred income taxes			3,506			3,506
Other long-term liabilities			5,346			5,346
Total liabilities			146,489			146,489
Twin Disc shareholders' equity:
Preferred shares authorized: 200,000; issued: none; no par value			0			0
Common shares authorized: 30,000,000; issued: 14,632,802; no par value			41,444			41,444
Retained earnings			134,141			134,141
Accumulated Other Comprehensive Income (Loss), Net of Tax			(29,880)			(29,880)
Equity before treasury stock			145,705			145,705
Less treasury stock, at cost (639,006 and 814,734 shares, respectively)			12,562			12,562
Total Twin Disc shareholders' equity			133,143			133,143
Noncontrolling interest			622			622
Total equity			133,765			133,765
Total liabilities and equity			280,254			280,254
CASH FLOWS FROM OPERATING ACTIVITIES:
Net (loss) income			1,154			(778)
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation and amortization						4,266
Gain on sale of assets						(4,203)
Provision for deferred income taxes						(1,105)
Stock compensation expense and other non-cash changes, net						1,565
Net change in operating assets and liabilities						287
Net cash provided by operating activities						32
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisition of property, plant, and equipment						(4,734)
Proceeds from sale of fixed assets						7,152
Proceeds on note receivable						0
Other, net						385
Net cash (used) provided by investing activities						2,803
CASH FLOWS FROM FINANCING ACTIVITIES:
Borrowings under revolving loan arrangements						42,898
Repayments of revolving loan arrangements						(46,628)
Repayments of other long-term debt						(839)
Payments of finance lease obligations
Payments of withholding taxes on stock compensation						(463)
Net cash used by financing activities						(5,032)
Effect of exchange rate changes on cash						3,204
Net change in cash						1,007
Cash:
Beginning of period				12,521		12,521
End of period			13,528			13,528
Net income (loss) attributable to Twin Disc			1,139			(890)
Balance			133,765			133,765
Translation adjustment during the quarter			8,392			2,005
Unrealized (loss) gain on hedges, net of income taxes of $0, $0, $0 and $0, respectively			(595)			198
Previously Reported [Member] | Retained Earnings [Member]
Other expense (income):
Net income (loss) attributable to Twin Disc						(890)
Twin Disc shareholders' equity:
Total equity			134,141			134,141
Cash:
Balance				135,031		135,031
Net income (loss) attributable to Twin Disc						(890)
Balance			134,141			134,141
Previously Reported [Member] | AOCI Attributable to Parent [Member]
Weighted average shares outstanding data:
Translation adjustment during the quarter						2,005
Unrealized (loss) gain on hedges, net of income taxes of $0, $0, $0 and $0, respectively						198
Twin Disc shareholders' equity:
Total equity			(29,880)			(29,880)
Cash:
Balance				(32,086)		(32,086)
Balance			(29,880)			(29,880)
Translation adjustment during the quarter						2,005
Benefit plan adjustments, net of tax						3
Unrealized (loss) gain on hedges, net of income taxes of $0, $0, $0 and $0, respectively						198
Revision of Prior Period, Change in Accounting Principle, Adjustment [Member]
Net sales			0			0
Cost of goods sold			0			0
Gross profit			0			0
Marketing, engineering and administrative expenses			0			0
Restructuring expenses			0			0
Other operating income			0			0
Income from operations			0			0
Other expense (income):
Interest expense			0			0
Other expense (income), net			(607)			(1,214)
Interest Income (Expense), Nonoperating, Net			(607)			(1,214)
Income before income taxes and noncontrolling interest			607			1,214
Income tax expense			0			0
Net (loss) income			607			1,214
Less: Net earnings attributable to noncontrolling interest, net of tax			0			0
Net income (loss) attributable to Twin Disc			$ 607			$ 1,214
Income (loss) per share data:
Basic income (loss) per share attributable to Twin Disc common shareholders (in dollars per share)			$ 0.05			$ 0.09
Diluted income (loss) per share attributable to Twin Disc common shareholders (in dollars per share)			$ 0.05			$ 0.09
Weighted average shares outstanding data:
Basic shares outstanding (in shares)			0			0
Diluted shares outstanding (in shares)			0			0
Net (loss) income			$ 607			$ 1,214
Benefit plan adjustments, net of income taxes of $13, $13, $8 and $4, respectively			(607)			(1,214)
Translation adjustment during the quarter			0			0
Unrealized (loss) gain on hedges, net of income taxes of $0, $0, $0 and $0, respectively			0			0
Comprehensive income			0			0
Less: Comprehensive income attributable to noncontrolling interest			0			0
Comprehensive income attributable to Twin Disc			0			0
Current assets:
Cash			0			0
Trade accounts receivable, net			0			0
Inventories			0			0
Assets held for sale			0			0
Prepaid expenses			0			0
Other			0			0
Total current assets			0			0
Property, plant and equipment, net			0			0
Right-of-use assets operating leases			0			0
Intangible assets, net			0			0
Deferred income taxes			0			0
Other assets			0			0
Total assets			0			0
Current liabilities:
Current maturities of long-term debt			0			0
Accounts payable			0			0
Accrued liabilities			0			0
Total current liabilities			0			0
Long-term debt			0			0
Lease obligations			0			0
Accrued retirement benefits			0			0
Deferred income taxes			0			0
Other long-term liabilities			0			0
Total liabilities			0			0
Twin Disc shareholders' equity:
Preferred shares authorized: 200,000; issued: none; no par value			0			0
Common shares authorized: 30,000,000; issued: 14,632,802; no par value			0			0
Retained earnings			(23,898)			(23,898)		$ (25,100)
Accumulated Other Comprehensive Income (Loss), Net of Tax			23,898			23,898		$ 25,100
Equity before treasury stock			0			0
Less treasury stock, at cost (639,006 and 814,734 shares, respectively)			0			0
Total Twin Disc shareholders' equity			0			0
Noncontrolling interest			0			0
Total equity			0			0
Total liabilities and equity			0			0
CASH FLOWS FROM OPERATING ACTIVITIES:
Net (loss) income			607			1,214
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation and amortization						0
Gain on sale of assets						0
Provision for deferred income taxes						0
Stock compensation expense and other non-cash changes, net						0
Net change in operating assets and liabilities						(1,214)
Net cash provided by operating activities						0
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisition of property, plant, and equipment						0
Proceeds from sale of fixed assets						0
Proceeds on note receivable						0
Other, net						0
Net cash (used) provided by investing activities						0
CASH FLOWS FROM FINANCING ACTIVITIES:
Borrowings under revolving loan arrangements						0
Repayments of revolving loan arrangements						0
Repayments of other long-term debt						132
Payments of finance lease obligations						(132)
Payments of withholding taxes on stock compensation						0
Net cash used by financing activities						0
Effect of exchange rate changes on cash						0
Net change in cash						0
Cash:
Beginning of period				0		0
End of period			0			0
Net income (loss) attributable to Twin Disc			607			1,214
Balance			0			0
Translation adjustment during the quarter			0			0
Unrealized (loss) gain on hedges, net of income taxes of $0, $0, $0 and $0, respectively			0			0
Revision of Prior Period, Change in Accounting Principle, Adjustment [Member] | Retained Earnings [Member]
Other expense (income):
Net income (loss) attributable to Twin Disc						1,214
Twin Disc shareholders' equity:
Total equity			(23,898)			(23,898)
Cash:
Balance				(25,112)		(25,112)
Net income (loss) attributable to Twin Disc						1,214
Balance			(23,898)			(23,898)
Revision of Prior Period, Change in Accounting Principle, Adjustment [Member] | AOCI Attributable to Parent [Member]
Weighted average shares outstanding data:
Translation adjustment during the quarter						0
Unrealized (loss) gain on hedges, net of income taxes of $0, $0, $0 and $0, respectively						0
Twin Disc shareholders' equity:
Total equity			23,898			23,898
Cash:
Balance				$ 25,112		25,112
Balance			23,898			23,898
Translation adjustment during the quarter						0
Benefit plan adjustments, net of tax						(1,214)
Unrealized (loss) gain on hedges, net of income taxes of $0, $0, $0 and $0, respectively						0
As Reported Under New Method [Member]
Net sales			63,351			119,264
Cost of goods sold			46,328			88,944
Gross profit			17,023			30,320
Marketing, engineering and administrative expenses			15,983			31,063
Restructuring expenses			164			174
Other operating income			(4,150)			(4,150)
Income from operations			5,026			3,233
Other expense (income):
Interest expense			594			1,160
Other expense (income), net			182			(164)
Interest Income (Expense), Nonoperating, Net			776			996
Income before income taxes and noncontrolling interest			4,250			2,237
Income tax expense			2,489			1,801
Net (loss) income			1,761			436
Less: Net earnings attributable to noncontrolling interest, net of tax			(15)			(112)
Net income (loss) attributable to Twin Disc			$ 1,746			$ 324
Income (loss) per share data:
Basic income (loss) per share attributable to Twin Disc common shareholders (in dollars per share)			$ 0.13			$ 0.02
Diluted income (loss) per share attributable to Twin Disc common shareholders (in dollars per share)			$ 0.13			$ 0.02
Weighted average shares outstanding data:
Basic shares outstanding (in shares)			13,460			13,434
Diluted shares outstanding (in shares)			13,699			13,434
Net (loss) income			$ 1,761			$ 436
Benefit plan adjustments, net of income taxes of $13, $13, $8 and $4, respectively			(1,122)			(1,211)
Translation adjustment during the quarter			8,392			2,005
Unrealized (loss) gain on hedges, net of income taxes of $0, $0, $0 and $0, respectively			(595)			198
Comprehensive income			8,436			1,428
Less: Comprehensive income attributable to noncontrolling interest			74			210
Comprehensive income attributable to Twin Disc			8,362			1,218
CASH FLOWS FROM OPERATING ACTIVITIES:
Net (loss) income			1,761			436
Cash:
Net income (loss) attributable to Twin Disc			1,746			324
Translation adjustment during the quarter			8,392			2,005
Unrealized (loss) gain on hedges, net of income taxes of $0, $0, $0 and $0, respectively			$ (595)			$ 198