CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)	3 Months Ended		9 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Revenues:
Total revenues	$ 19,213,000	$ 17,972,000	$ 56,451,000	$ 52,898,000
Costs and operating expenses:
Hotel operating expenses	(11,378,000)	(10,573,000)	(33,424,000)	(31,905,000)
Real estate operating expenses	(2,051,000)	(1,843,000)	(5,929,000)	(5,840,000)
Depreciation and amortization expenses	(1,218,000)	(1,260,000)	(3,710,000)	(3,801,000)
General and administrative expenses	(667,000)	(828,000)	(1,789,000)	(2,389,000)
Total costs and operating expenses	(15,314,000)	(14,504,000)	(44,852,000)	(43,935,000)
Income from operations	3,899,000	3,468,000	11,599,000	8,963,000
Other income (expense):
Interest expense - mortgages	(2,410,000)	(2,360,000)	(7,380,000)	(7,343,000)
Loss on disposal of assets	(398,000)	0	(398,000)	0
Net (loss) gain on marketable securities	681,000	636,000	(999,000)	1,190,000
Net gain (loss) on marketable securities - Comstock	280,000	(744,000)	(182,000)	(3,498,000)
Unrealized loss on other investments	0	(42,000)	0	(42,000)
Impairment loss on other investments	(98,000)	0	(98,000)	(200,000)
Dividend and interest income	194,000	92,000	379,000	223,000
Trading and margin interest expense	(312,000)	(260,000)	(809,000)	(886,000)
Total other expense, net	(2,063,000)	(2,678,000)	(9,487,000)	(10,556,000)
Income (loss) before income taxes	1,836,000	790,000	2,112,000	(1,593,000)
Income tax expense	(501,000)	(11,000)	(771,000)	(430,000)
Net income (loss)	1,335,000	779,000	1,341,000	(2,023,000)
Less: Net (income) loss attributable to the noncontrolling interest	(284,000)	(251,000)	(687,000)	934,000
Net income (loss) attributable to InterGroup Corporation	$ 1,051,000	$ 528,000	$ 654,000	$ (1,089,000)
Net income (loss) per share
Basic	$ 0.57	$ 0.33	$ 0.58	$ (0.86)
Diluted	0.50	0.29	0.50
Net income (loss) per share attributable to InterGroup Corporation
Basic	0.45	0.22	0.28	$ (0.46)
Diluted	$ 0.40	$ 0.20	$ 0.25
Weighted average number of basic common shares outstanding	2,329,207	2,353,073	2,329,883	2,357,289
Weighted average number of diluted common shares outstanding	2,659,602	2,671,073	2,660,278
Hotel [Member]
Revenues:
Total revenues	$ 15,469,000	$ 14,344,000	$ 45,276,000	$ 41,968,000
Real Estate [Member]
Revenues:
Total revenues	$ 3,744,000	$ 3,628,000	$ 11,175,000	$ 10,930,000