CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' DEFICIT - USD ($)	Total	Common Stock [Member]	Retained Earnings (Accumulated Deficit) [Member]	Total Portsmouth Shareholders' Deficit [Member]	Noncontrolling Interest [Member]
Balance at Jun. 30, 2017	$ (81,542,000)	$ 2,092,000	$ (77,120,000)	$ (75,028,000)	$ (6,514,000)
Balance (in shares) at Jun. 30, 2017		734,183
Net income (loss)	407,000		334,000	334,000	73,000
Balance at Sep. 30, 2017	(81,135,000)	$ 2,092,000	(76,786,000)	(74,694,000)	(6,441,000)
Balance (in shares) at Sep. 30, 2017		734,183
Balance at Jun. 30, 2017	(81,542,000)	$ 2,092,000	(77,120,000)	(75,028,000)	(6,514,000)
Balance (in shares) at Jun. 30, 2017		734,183
Net income (loss)	(3,539,000)
Balance at Dec. 31, 2017	(85,081,000)	$ 2,092,000	(80,711,000)	(78,619,000)	(6,462,000)
Balance (in shares) at Dec. 31, 2017		734,183
Balance at Sep. 30, 2017	(81,135,000)	$ 2,092,000	(76,786,000)	(74,694,000)	(6,441,000)
Balance (in shares) at Sep. 30, 2017		734,183
Net income (loss)	(3,946,000)		(3,925,000)	(3,925,000)	(21,000)
Balance at Dec. 31, 2017	(85,081,000)	$ 2,092,000	(80,711,000)	(78,619,000)	(6,462,000)
Balance (in shares) at Dec. 31, 2017		734,183
Balance at Jun. 30, 2018	(77,082,000)	$ 2,092,000	(73,475,000)	(71,383,000)	(5,699,000)
Balance (in shares) at Jun. 30, 2018		734,183
Net income (loss)	1,482,000		1,321,000	1,321,000	161,000
Balance at Sep. 30, 2018	(75,600,000)	$ 2,092,000	(72,154,000)	(70,062,000)	(5,538,000)
Balance (in shares) at Sep. 30, 2018		734,183
Balance at Jun. 30, 2018	(77,082,000)	$ 2,092,000	(73,475,000)	(71,383,000)	(5,699,000)
Balance (in shares) at Jun. 30, 2018		734,183
Net income (loss)	1,443,000
Balance at Dec. 31, 2018	(75,639,000)	$ 2,092,000	(72,202,000)	(70,110,000)	(5,529,000)
Balance (in shares) at Dec. 31, 2018		734,183
Balance at Sep. 30, 2018	(75,600,000)	$ 2,092,000	(72,154,000)	(70,062,000)	(5,538,000)
Balance (in shares) at Sep. 30, 2018		734,183
Net income (loss)	(39,000)		(48,000)	(48,000)	9,000
Balance at Dec. 31, 2018	$ (75,639,000)	$ 2,092,000	$ (72,202,000)	$ (70,110,000)	$ (5,529,000)
Balance (in shares) at Dec. 31, 2018		734,183