Condensed Consolidated Statements of Shareholders' Deficit (Unaudited) - USD ($)	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Treasury Stock [Member]	InterGroup Shareholder' Deficit [Member]	Noncontrolling Interest [Member]	Total
Beginning balance at Jun. 30, 2019	$ 33,000	$ 10,342,000	$ (39,760,000)	$ (14,347,000)	$ (43,732,000)	$ (24,697,000)	$ (68,429,000)
Beginning balance, shares at Jun. 30, 2019	3,404,982
Net income (loss)			336,000		336,000	308,000	644,000
Stock options expense		8,000			8,000		8,000
Investment in Santa Fe		(147,000)			(147,000)	74,000	(73,000)
Purchase of treasury stock				(156,000)	(156,000)		(156,000)
Ending balance at Sep. 30, 2019	$ 33,000	10,203,000	(39,424,000)	(14,503,000)	(43,691,000)	(24,315,000)	(68,006,000)
Ending balance, shares at Sep. 30, 2019	3,404,982
Beginning balance at Jun. 30, 2019	$ 33,000	10,342,000	(39,760,000)	(14,347,000)	(43,732,000)	(24,697,000)	(68,429,000)
Beginning balance, shares at Jun. 30, 2019	3,404,982
Net income (loss)							(2,035,000)
Distribution to NCI
Ending balance at Mar. 31, 2020	$ 33,000	6,797,000	(41,756,000)	(14,915,000)	(49,841,000)	(21,225,000)	(71,066,000)
Ending balance, shares at Mar. 31, 2020	3,404,982
Beginning balance at Sep. 30, 2019	$ 33,000	10,203,000	(39,424,000)	(14,503,000)	(43,691,000)	(24,315,000)	(68,006,000)
Beginning balance, shares at Sep. 30, 2019	3,404,982
Net income (loss)			248,000		248,000	132,000	380,000
Stock options expense		9,000			9,000		9,000
Investment in Santa Fe		(46,000)			(46,000)	22,000	(24,000)
Purchase of treasury stock				(190,000)	(190,000)		(190,000)
Ending balance at Dec. 31, 2019	$ 33,000	10,166,000	(39,176,000)	(14,693,000)	(43,670,000)	(24,161,000)	(67,831,000)
Ending balance, shares at Dec. 31, 2019	3,404,982
Net income (loss)			(2,580,000)		(2,580,000)	(479,000)	(3,059,000)
Stock options expense		121,000			121,000		121,000
Investment in Santa Fe		(4,279,000)			(4,279,000)	3,353,000	(926,000)
Investment in Portsmouth		(124,000)			(124,000)	62,000	(62,000)
Investment in Woodland		913,000			913,000		913,000
Purchase of treasury stock				(222,000)	(222,000)		(222,000)
Ending balance at Mar. 31, 2020	$ 33,000	6,797,000	(41,756,000)	(14,915,000)	(49,841,000)	(21,225,000)	(71,066,000)
Ending balance, shares at Mar. 31, 2020	3,404,982
Beginning balance at Jun. 30, 2020	$ 33,000	6,626,000	(43,541,000)	(14,995,000)	(51,877,000)	(22,370,000)	(74,247,000)
Beginning balance, shares at Jun. 30, 2020	3,404,982
Net income (loss)			4,550,000		4,550,000	269,000	4,819,000
Stock options expense		5,000			5,000		5,000
Purchase of treasury stock				(140,000)	(140,000)		(140,000)
Ending balance at Sep. 30, 2020	$ 33,000	6,631,000	(38,991,000)	(15,135,000)	(47,462,000)	(22,101,000)	(69,563,000)
Ending balance, shares at Sep. 30, 2020	3,404,982
Beginning balance at Jun. 30, 2020	$ 33,000	6,626,000	(43,541,000)	(14,995,000)	(51,877,000)	(22,370,000)	(74,247,000)
Beginning balance, shares at Jun. 30, 2020	3,404,982
Net income (loss)							5,155,000
Distribution to NCI							979,000
Ending balance at Mar. 31, 2021	$ 33,000	6,638,000	(37,574,000)	(16,333,000)	(47,236,000)	(24,367,000)	(71,603,000)
Ending balance, shares at Mar. 31, 2021	3,404,982
Beginning balance at Sep. 30, 2020	$ 33,000	6,631,000	(38,991,000)	(15,135,000)	(47,462,000)	(22,101,000)	(69,563,000)
Beginning balance, shares at Sep. 30, 2020	3,404,982
Net income (loss)			(65,000)		(65,000)	(998,000)	(1,063,000)
Stock options expense		5,000			5,000		5,000
Purchase of treasury stock				(116,000)	(116,000)		(116,000)
Ending balance at Dec. 31, 2020	$ 33,000	6,636,000	(39,056,000)	(15,251,000)	(47,638,000)	(23,099,000)	(70,737,000)
Ending balance, shares at Dec. 31, 2020	3,404,982
Net income (loss)			1,110,000		1,110,000	289,000	1,399,000
Stock options expense		2,000			2,000		2,000
Reclassify NCI to INTG			372,000		372,000	(372,000)
Investment in Justice						(206,000)	(206,000)
Distribution to NCI						(979,000)	(979,000)
Purchase of treasury stock				(1,082,000)	(1,082,000)		(1,082,000)
Ending balance at Mar. 31, 2021	$ 33,000	$ 6,638,000	$ (37,574,000)	$ (16,333,000)	$ (47,236,000)	$ (24,367,000)	$ (71,603,000)
Ending balance, shares at Mar. 31, 2021	3,404,982