Note P - Impact of Accounting Method Change - Adjustment to Financial Statements (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended						9 Months Ended
	Mar. 29, 2024	Dec. 29, 2023	Sep. 29, 2023	Mar. 31, 2023	Dec. 30, 2022	Sep. 30, 2022	Mar. 29, 2024	Mar. 31, 2023	Jun. 30, 2023	Jul. 01, 2022
Net sales	$ 74,161			$ 73,772			$ 210,709	$ 193,036
Gross profit	20,940			19,265			58,233	49,585
Marketing, engineering and administrative expenses	17,199			14,626			51,268	45,688
Restructuring expenses	139			33			207	208
Other operating expense (income)	0			1			0	(4,149)
Income from operations	3,602			4,605			6,758	7,838
Interest expense	263			522			1,049	1,682
Other (income) expense, net	(959)			178			(649)	13
Interest Income (Expense), Nonoperating	(696)			700			400	1,695
Income before income taxes and noncontrolling interest	4,298			3,905			6,358	6,143
Income tax expense	398			548			2,606	2,350
Net income	3,900	$ 935	$ (1,083)	3,357	$ 1,761	$ (1,324)	3,752	3,793
Less: Net earnings attributable to noncontrolling interest, net of tax	(78)			(76)			(173)	(188)
Net income attributable to Twin Disc	$ 3,822			$ 3,281			$ 3,579	$ 3,605
Basic income per share attributable to Twin Disc common shareholders (in dollars per share)	$ 0.28			$ 0.24			$ 0.26	$ 0.27
Diluted income per share attributable to Twin Disc common shareholders (in dollars per share)	$ 0.27			$ 0.24			$ 0.26	$ 0.26
Basic shares outstanding (in shares)	13,742			13,504			13,663	13,455
Diluted shares outstanding (in shares)	13,904			13,662			13,852	13,608
Benefit plan adjustments, net of income taxes of $10, $(1), $2 and $(5), respectively	$ (191)	(108)	(171)	$ (29)	(1,122)	(89)	$ (470)	$ (1,240)
Translation adjustment during the quarter	(3,084)	5,190	(3,036)	1,014	8,392	(6,290)	(930)	3,116
Unrealized gain (loss) on hedges, net of income taxes of $0, $0, $0 and $0, respectively	196	(485)	216	(224)	(595)	793	(73)	(26)
Comprehensive income (loss)	821			4,118			2,279	5,643
Less: Comprehensive income attributable to noncontrolling interest	34			67			224	277
Comprehensive income attributable to Twin Disc	787			4,051			2,055	5,366
Current assets:
Cash	23,843			14,024			23,843	14,024	$ 13,263
Trade accounts receivable, net	40,950			44,438			40,950	44,438	54,760
Inventories	129,845			136,153			129,845	136,153	131,930
Assets held for sale	2,968			2,968			2,968	2,968	2,968
Prepaid expenses	10,471			10,025			10,471	10,025	8,459
Other	10,451			8,341			10,451	8,341	8,326
Total current assets	218,528			215,949			218,528	215,949	219,706
Property, plant and equipment, net	40,606			40,700			40,606	40,700	38,650
Right-of-use assets operating leases	14,498			12,415			14,498	12,415	13,133
Intangible assets, net	10,157			11,239			10,157	11,239	12,637
Deferred income taxes	2,210			2,542			2,210	2,542	2,244
Other assets	2,755			2,668			2,755	2,668	2,811
Total assets	288,754			285,513			288,754	285,513	289,181
Current liabilities:
Current maturities of long-term debt	2,000			2,000			2,000	2,000	2,010
Accounts payable	33,230			29,726			33,230	29,726	36,499
Accrued liabilities	63,406			56,886			63,406	56,886	61,586
Total current liabilities	98,636			88,612			98,636	88,612	100,095
Long-term debt	15,042			29,276			15,042	29,276	16,617
Lease obligations	12,638			9,897			12,638	9,897	10,811
Accrued retirement benefits	6,707			10,315			6,707	10,315	7,608
Deferred income taxes	2,965			3,391			2,965	3,391	3,280
Other long-term liabilities	5,822			5,403			5,822	5,403	5,253
Total liabilities	141,810			146,894			141,810	146,894	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	40,428			42,145			40,428	42,145	42,855
Retained earnings	122,759			113,524			122,759	113,524	120,299
Accumulated Other Comprehensive Income (Loss), Net of Tax	(7,094)			(5,212)			(7,094)	(5,212)	(5,570)
Equity before treasury stock	156,093			150,457			156,093	150,457	157,584
Less treasury stock, at cost (638,712 and 814,734 shares, respectively)	9,797			12,527			9,797	12,527	12,491
Total Twin Disc shareholders' equity	146,296			137,930			146,296	137,930	145,093
Noncontrolling interest	648			689			648	689	424
Total equity	146,944	145,910	140,175	138,619	133,765	124,768	146,944	138,619	145,517
Total liabilities and equity	288,754			285,513			288,754	285,513	289,181
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	3,900	935	(1,083)	3,357	1,761	(1,324)	3,752	3,793
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization							7,497	6,936
Gain on sale of assets							(87)	(4,237)
Provision for deferred income taxes							239	(1,462)
Stock compensation expense and other non-cash changes, net							2,242	2,355
Net change in operating assets and liabilities							5,531	(526)
Net cash provided by operating activities							22,273	6,859
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisition of property, plant, and equipment							(7,598)	(6,783)
Proceeds from sale of fixed assets							0	7,177
Proceeds on note receivable								0
Other, net							(167)	199
Net cash (used) provided by investing activities							(7,765)	593
CASH FLOWS FROM FINANCING ACTIVITIES:
Borrowings under revolving loan arrangements							66,661	65,862
Repayments of revolving loan arrangements							(66,661)	(69,823)
Repayments of other long-term debt							(1,510)	(1,534)
Payments of finance lease obligations	(192)			(73)			(663)	(231)
Payments of withholding taxes on stock compensation							(1,791)	(463)
Net cash used by financing activities							(5,083)	(6,189)
Effect of exchange rate changes on cash							1,155	240
Net change in cash							10,580	1,503
Cash:
Beginning of period			13,263			12,521	13,263	12,521
End of period	23,843			14,024			23,843	14,024
Balance	145,910	140,175	145,517	133,765	124,768	131,188	145,517	131,188
Net income attributable to Twin Disc	3,822			3,281			3,579	3,605
Balance	146,944	145,910	140,175	138,619	133,765	124,768	146,944	138,619
Translation adjustment during the quarter	(3,084)	5,190	(3,036)	1,014	8,392	(6,290)	(930)	3,116
Unrealized gain (loss) on hedges, net of income taxes of $0, $0, $0 and $0, respectively	196	(485)	216	(224)	(595)	793	(73)	(26)
Retained Earnings [Member]
Net income	3,822	930	(1,173)	3,281	1,746	(1,422)
Net income attributable to Twin Disc								3,605
Twin Disc shareholders' equity:
Total equity	122,759	119,496	119,126	113,524	110,243	108,497	122,759	113,524	120,299
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	3,822	930	(1,173)	3,281	1,746	(1,422)
Cash:
Balance	119,496	119,126	120,299	110,243	108,497	109,919	120,299	109,919
Net income attributable to Twin Disc								3,605
Balance	122,759	119,496	119,126	113,524	110,243	108,497	122,759	113,524
AOCI Attributable to Parent [Member]
Benefit plan adjustments, net of income taxes of $10, $(1), $2 and $(5), respectively	(191)	(108)	(171)	(29)	(1,122)	(89)
Translation adjustment during the quarter	(3,040)	5,155	(3,096)	1,023	8,333	(6,328)		3,028
Unrealized gain (loss) on hedges, net of income taxes of $0, $0, $0 and $0, respectively	196	(485)	216	(224)	(595)	793		(26)
Twin Disc shareholders' equity:
Total equity	(7,094)	(4,059)	(8,621)	(5,212)	(5,982)	(12,598)	(7,094)	(5,212)	$ (5,570)
Cash:
Balance	(4,059)	(8,621)	(5,570)	(5,982)	(12,598)	(6,974)	(5,570)	(6,974)
Balance	(7,094)	(4,059)	(8,621)	(5,212)	(5,982)	(12,598)	$ (7,094)	(5,212)
Translation adjustment during the quarter	(3,040)	5,155	(3,096)	1,023	8,333	(6,328)		3,028
Benefit plan adjustments, net of tax								(1,240)
Unrealized gain (loss) on hedges, net of income taxes of $0, $0, $0 and $0, respectively	$ 196	$ (485)	$ 216	(224)	$ (595)	793		(26)
Previously Reported [Member]
Net sales				73,772				193,036
Cost of goods sold				54,507				143,451
Gross profit				19,265				49,585
Marketing, engineering and administrative expenses				14,626				45,688
Restructuring expenses				33				208
Other operating expense (income)				1				(4,149)
Income from operations				4,605				7,838
Interest expense				522				1,682
Other (income) expense, net				785				1,834
Interest Income (Expense), Nonoperating				1,307				3,516
Income before income taxes and noncontrolling interest				3,298				4,322
Income tax expense				548				2,350
Net income				2,750				1,972
Less: Net earnings attributable to noncontrolling interest, net of tax				(76)				(188)
Net income attributable to Twin Disc				$ 2,674				$ 1,784
Basic income per share attributable to Twin Disc common shareholders (in dollars per share)				$ 0.2				$ 0.13
Diluted income per share attributable to Twin Disc common shareholders (in dollars per share)				$ 0.2				$ 0.13
Basic shares outstanding (in shares)				13,504,000				13,455,000
Diluted shares outstanding (in shares)				13,662,000				13,608,000
Benefit plan adjustments, net of income taxes of $10, $(1), $2 and $(5), respectively				$ 578				$ 581
Translation adjustment during the quarter				1,014
Unrealized gain (loss) on hedges, net of income taxes of $0, $0, $0 and $0, respectively				(224)				(26)
Comprehensive income (loss)				4,118				5,643
Less: Comprehensive income attributable to noncontrolling interest				67
Comprehensive income attributable to Twin Disc				4,051				5,366
Current assets:
Cash				14,024				14,024
Trade accounts receivable, net				44,438				44,438
Inventories				136,153				136,153
Assets held for sale				2,968				2,968
Prepaid expenses				10,025				10,025
Other				8,341				8,341
Total current assets				215,949				215,949
Property, plant and equipment, net				40,700				40,700
Right-of-use assets operating leases				12,415				12,415
Intangible assets, net				11,239				11,239
Deferred income taxes				2,542				2,542
Other assets				2,668				2,668
Total assets				285,513				285,513
Current liabilities:
Current maturities of long-term debt				2,000				2,000
Accounts payable				29,726				29,726
Accrued liabilities				56,886				56,886
Total current liabilities				88,612				88,612
Long-term debt				29,276				29,276
Lease obligations				9,897				9,897
Accrued retirement benefits				10,315				10,315
Deferred income taxes				3,391				3,391
Other long-term liabilities				5,403				5,403
Total liabilities				146,894				146,894
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				42,145				42,145
Retained earnings				136,815				136,815
Accumulated Other Comprehensive Income (Loss), Net of Tax				(28,503)				(28,503)
Equity before treasury stock				150,457				150,457
Less treasury stock, at cost (638,712 and 814,734 shares, respectively)				12,527				12,527
Total Twin Disc shareholders' equity				137,930				137,930
Noncontrolling interest				689				689
Total equity				138,619				138,619
Total liabilities and equity				285,513				285,513
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income				2,750				1,972
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization								6,936
Gain on sale of assets								(4,237)
Provision for deferred income taxes								(1,462)
Stock compensation expense and other non-cash changes, net								2,355
Net change in operating assets and liabilities								1,295
Net cash provided by operating activities								6,859
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisition of property, plant, and equipment								(6,783)
Proceeds from sale of fixed assets								7,177
Proceeds on note receivable								0
Other, net								199
Net cash (used) provided by investing activities								593
CASH FLOWS FROM FINANCING ACTIVITIES:
Borrowings under revolving loan arrangements								65,862
Repayments of revolving loan arrangements								(69,823)
Repayments of other long-term debt								(1,534)
Payments of finance lease obligations								(231)
Payments of withholding taxes on stock compensation								(463)
Net cash used by financing activities								(6,189)
Effect of exchange rate changes on cash								240
Net change in cash								1,503
Cash:
Beginning of period						12,521		12,521
End of period				14,024				14,024
Net income attributable to Twin Disc				2,674				1,784
Balance				138,619				138,619
Translation adjustment during the quarter				1,014
Unrealized gain (loss) on hedges, net of income taxes of $0, $0, $0 and $0, respectively				(224)				(26)
Previously Reported [Member] | Retained Earnings [Member]
Net income attributable to Twin Disc								1,784
Twin Disc shareholders' equity:
Total equity				136,815				136,815
Cash:
Balance						135,031		135,031
Net income attributable to Twin Disc								1,784
Balance				136,815				136,815
Previously Reported [Member] | AOCI Attributable to Parent [Member]
Translation adjustment during the quarter								3,028
Unrealized gain (loss) on hedges, net of income taxes of $0, $0, $0 and $0, respectively								(26)
Twin Disc shareholders' equity:
Total equity				(28,503)				(28,503)
Cash:
Balance						(32,086)		(32,086)
Balance				(28,503)				(28,503)
Translation adjustment during the quarter								3,028
Benefit plan adjustments, net of tax								581
Unrealized gain (loss) on hedges, net of income taxes of $0, $0, $0 and $0, respectively								(26)
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 expense (income)				0				0
Income from operations				0				0
Interest expense				0				0
Other (income) expense, net				(607)				(1,821)
Interest Income (Expense), Nonoperating				(607)				(1,821)
Income before income taxes and noncontrolling interest				607				1,821
Income tax expense				0				0
Net income				607				1,821
Less: Net earnings attributable to noncontrolling interest, net of tax				0				0
Net income attributable to Twin Disc				$ 607				$ 1,821
Basic income per share attributable to Twin Disc common shareholders (in dollars per share)				$ 0.04				$ 0.14
Diluted income per share attributable to Twin Disc common shareholders (in dollars per share)				$ 0.04				$ 0.13
Basic shares outstanding (in shares)				0				0
Diluted shares outstanding (in shares)				0				0
Benefit plan adjustments, net of income taxes of $10, $(1), $2 and $(5), respectively				$ (607)				$ (1,821)
Unrealized gain (loss) on hedges, net of income taxes of $0, $0, $0 and $0, respectively				0				0
Comprehensive income (loss)				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				(23,291)				(23,291)		$ (25,100)
Accumulated Other Comprehensive Income (Loss), Net of Tax				23,291				23,291		$ 25,100
Equity before treasury stock				0				0
Less treasury stock, at cost (638,712 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 income				607				1,821
Adjustments to reconcile net 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								(1,821)
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								0
Payments of finance lease obligations								0
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 attributable to Twin Disc				607				1,821
Balance				0				0
Unrealized gain (loss) 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]
Net income attributable to Twin Disc								1,821
Twin Disc shareholders' equity:
Total equity				(23,291)				(23,291)
Cash:
Balance						(25,112)		(25,112)
Net income attributable to Twin Disc								1,821
Balance				(23,291)				(23,291)
Revision of Prior Period, Change in Accounting Principle, Adjustment [Member] | AOCI Attributable to Parent [Member]
Translation adjustment during the quarter								0
Unrealized gain (loss) on hedges, net of income taxes of $0, $0, $0 and $0, respectively								0
Twin Disc shareholders' equity:
Total equity				23,291				23,291
Cash:
Balance						$ 25,112		25,112
Balance				23,291				23,291
Translation adjustment during the quarter								0
Benefit plan adjustments, net of tax								(1,821)
Unrealized gain (loss) on hedges, net of income taxes of $0, $0, $0 and $0, respectively								0
As Reported Under New Method [Member]
Net sales				73,772				193,036
Cost of goods sold				54,507				143,451
Gross profit				19,265				49,585
Marketing, engineering and administrative expenses				14,626				45,688
Restructuring expenses				33				208
Other operating expense (income)				1				(4,149)
Income from operations				4,605				7,838
Interest expense				522				1,682
Other (income) expense, net				178				13
Interest Income (Expense), Nonoperating				700				1,695
Income before income taxes and noncontrolling interest				3,905				6,143
Income tax expense				548				2,350
Net income				3,357				3,793
Less: Net earnings attributable to noncontrolling interest, net of tax				(76)				(188)
Net income attributable to Twin Disc				$ 3,281				$ 3,605
Basic income per share attributable to Twin Disc common shareholders (in dollars per share)				$ 0.24				$ 0.27
Diluted income per share attributable to Twin Disc common shareholders (in dollars per share)				$ 0.24				$ 0.26
Basic shares outstanding (in shares)				13,504,000				13,455,000
Diluted shares outstanding (in shares)				13,662,000				13,608,000
Benefit plan adjustments, net of income taxes of $10, $(1), $2 and $(5), respectively				$ (29)				$ (1,240)
Unrealized gain (loss) on hedges, net of income taxes of $0, $0, $0 and $0, respectively				(224)				(26)
Comprehensive income (loss)				4,118				5,643
Comprehensive income attributable to Twin Disc				4,051				5,366
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income				3,357				3,793
Cash:
Net income attributable to Twin Disc				3,281				3,605
Unrealized gain (loss) on hedges, net of income taxes of $0, $0, $0 and $0, respectively				$ (224)				$ (26)