CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)	3 Months Ended		6 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Revenues:
Total revenues	$ 17,749,000	$ 16,812,000	$ 37,238,000	$ 34,926,000
Costs and operating expenses:
Hotel operating expenses	(11,236,000)	(10,743,000)	(22,046,000)	(21,332,000)
Real estate operating expenses	(1,866,000)	(2,102,000)	(3,878,000)	(3,997,000)
Depreciation and amortization expenses	(1,249,000)	(1,267,000)	(2,492,000)	(2,541,000)
General and administrative expenses	(479,000)	(730,000)	(1,122,000)	(1,561,000)
Total costs and operating expenses	(14,830,000)	(14,842,000)	(29,538,000)	(29,431,000)
Income from operations	2,919,000	1,970,000	7,700,000	5,495,000
Other income (expense):
Interest expense - mortgages	(2,405,000)	(2,490,000)	(4,970,000)	(4,983,000)
Net (loss) gain on marketable securities	(1,945,000)	907,000	(1,680,000)	554,000
Net loss on marketable securities - Comstock	(26,000)	(2,085,000)	(462,000)	(2,754,000)
Impairment loss on other investments	0	(200,000)	0	(200,000)
Dividend and interest income	88,000	48,000	185,000	131,000
Trading and margin interest expense	(193,000)	(313,000)	(497,000)	(626,000)
Total other expense, net	(4,481,000)	(4,133,000)	(7,424,000)	(7,878,000)
Income (loss) before income taxes	(1,562,000)	(2,163,000)	276,000	(2,383,000)
Income tax benefit (expense)	440,000	(344,000)	(270,000)	(419,000)
Net income (loss)	(1,122,000)	(2,507,000)	6,000	(2,802,000)
Less: Net (income) loss attributable to the noncontrolling interest	95,000	1,302,000	(403,000)	1,185,000
Net loss attributable to InterGroup Corporation	$ (1,027,000)	$ (1,205,000)	$ (397,000)	$ (1,617,000)
Net income (loss) per share
Basic and diluted	$ (0.48)	$ (1.06)
Basic			$ 0.003	$ (1.18)
Diluted			0.002	(1.18)
Net loss per share attributable to InterGroup Corporation
Basic and diluted	$ (0.44)	$ (0.51)	$ (0.17)	$ (0.68)
Weighted average number of basic common shares outstanding			2,330,213	2,371,445
Weighted average number of diluted common shares outstanding	2,327,007	2,371,125	2,657,008	2,371,445
Hotel [Member]
Revenues:
Total revenues	$ 13,997,000	$ 13,187,000	$ 29,807,000	$ 27,624,000
Real Estate [Member]
Revenues:
Total revenues	$ 3,752,000	$ 3,625,000	$ 7,431,000	$ 7,302,000