Stockholders' Equity (Details Narrative)						5 Months Ended	12 Months Ended
	May 11, 2020 $ / shares shares	Jun. 30, 2019 $ / shares shares	May 22, 2019	Dec. 31, 2018 $ / shares shares	Sep. 24, 2018 USD ($) $ / shares shares	Nov. 20, 2020 shares	Jun. 30, 2020 USD ($) $ / shares shares	Jun. 30, 2019 USD ($) $ / shares shares	Aug. 04, 2020 shares	Aug. 03, 2020 shares	Jul. 14, 2020 shares	Jun. 10, 2020 shares	Jun. 09, 2020 shares	Mar. 31, 2020 shares	Sep. 04, 2019 shares	Aug. 27, 2019 shares	Aug. 26, 2019 shares	Mar. 21, 2019 $ / shares shares	Mar. 20, 2019 shares	Mar. 18, 2019 shares	Mar. 17, 2019 shares	Jan. 11, 2019 shares	Jan. 04, 2019 shares	Jun. 30, 2018 USD ($)
Classes of stock, shares authorized							100,001,000
Common stock, shares authorized		100,000,000					100,000,000	100,000,000				250,000,000	100,000,000		100,000,000	100,000,000	25,000,000	125,000,000,000	25,000,000	25,000,000	125,000,000,000		125,000,000,000
Common stock, par value | $ / shares		$ 0.01					$ 0.01	$ 0.01										$ 0.01
Common stock, shares issued		11,689,078					19,318,679	11,689,078
Common stock, shares outstanding		11,689,078					19,174,492	11,689,078
Common stock to be issued, shares							2,666,666
Preferred stock, shares authorized		1,000					1,000	1,000
Preferred stock, par value | $ / shares		$ 0.01					$ 0.01	$ 0.01
Preferred stock, shares issued		1,000					1,000	1,000
Preferred stock, shares outstanding		1,000					1,000	1,000
Stockholders' equity, reverse stock split			1-for-5,000
Proceeds from sale of common stock | $							$ 347,000	$ 193,000
Share issued price per share | $ / shares	$ 0.3583
Issuance of common stock for services | $							$ 46,500	$ 575,000
Number of shares issued on restricted shares, shares	2,666,666
Issuance of common stock for conversion of related party debts and strategic consultants, shares							294,654	3,898,733
Issuance of common stock for conversion of related party debts and strategic consultants | $							$ 219,517	$ 1,801,057
Coomon stock to be issued for conversion of related party debts and strategic consultants, shares								329,553
Debt conversion, converted instrument, amount | $							$ 477,763
Debt conversion, converted instrument, common stock issued							5,872,362
Common stock, capital shares reserved for future issuance							87,000,000
Treasury stock, common, shares							7,202
Revenue | $							$ 30,276,422	2,500,000
Stock-based compensation | $							$ 16,335,671	$ 3,819,610
Conversion percentage				0.75			0.75
Issuance of common stock for conversions of convertible promissory notes | $							$ 1,054,204
Share-based payment award, options, vested, number of shares							115,818
Share-based payment award, options, nonvested, number of shares							115,817
Officer's And Director - Conversion Share Reserve [Member]
Common stock, capital shares reserved for future issuance		532,040		532,040				532,040
Exercise price of warrants | $ / shares				$ 75
Conversion percentage		0.75
Prior Liabilities - Settlement Reserve [Member]
Common stock, capital shares reserved for future issuance		1,967,960						1,967,960						315,949
Continuing Operations Share Reserve [Member]
Common stock, capital shares reserved for future issuance														185,063
Settlement and New Funding Share Reserves [Member]
Common stock, capital shares reserved for future issuance		3,000,000						3,000,000
Settlement and New Funding Share Reserves [Member] | Settlement Reserve [Member]
Common stock, capital shares reserved for future issuance		1,967,960						1,967,960
Settlement and New Funding Share Reserves [Member] | Funding Reserve [Member]
Common stock, capital shares reserved for future issuance		500,000						500,000
Settlement and New Funding Share Reserves [Member] | Prior Liabilities - Settlement Reserve [Member]
Common stock, capital shares reserved for future issuance														315,949
Settlement and New Funding Share Reserves [Member] | Continuing Operations Share Reserve [Member]
Common stock, capital shares reserved for future issuance														185,063
2014 under an Equity Line of Credit [Member]
Treasury stock, common, shares							8,000
Mr. Biderman [Member]
Issuance of common stock to accredited investors in private placements								200,000
Three Officers [Member]
Share issued price per share | $ / shares					$ 0.50
Issuance of common stock for services, shares					1,150,000
Issuance of common stock for services | $					$ 575,000
Accrued expenses | $																								$ 575,000
Mr. Cutchens [Member]
Number of shares issued on restricted shares, shares							231,635
Share-based compensation arrangement by share-based payment award, award vesting rights description							The restricted shares of common stock vest 25% on the six-month, 1 year, 2 year, and 3 year anniversaries of the Grant Date.
Share-based compensation arrangement by share-based payment award, award vesting rights, percentage							25.00%
Stock-based compensation expense related to award vested | $							$ 133,142	$ 16,464
Mr. Bhatnagar [Member]
Issuance of common stock to accredited investors in private placements								2,620,899
Stock-based compensation expense related to award vested | $								$ 1,310,449
Class of warrant number of securities called by warrants		4,985,394					32,405,058	4,985,394
Mr. Bhatnagar [Member] | Warrant Agreement - Earned Warrants [Member]
Purchase price of common stock, percent							4.00%
Revenue | $							$ 1,000,000
Exercise price of warrants | $ / shares							$ 0.50
Warrants exceed percentage of fully diluted common stock							80.00%
Stock-based compensation | $							$ 16,202,529
Mr. Bhatnagar [Member] | Warrant Agreement - Accelerated Warrants [Member]
Revenue | $								$ 2,500,000
Warrants exceed percentage of fully diluted common stock							80.00%
Acquire maximum percentage of outstanding fully diluted common stock, upon certain condition description							Mr. Bhatnagar, the Company's President and CEO, shall immediately receive the remaining amount of warrants necessary to acquire up to 80% of the outstanding fully diluted common stock of the Company ("Accelerated Warrants") when either of the following occur: a) the Company completes a stock or asset purchase of Scepter Commodities, LLC; or b) the Company completes a stock or asset purchase of any other entity, either of which, in the aggregate, together with prior revenue increases achieved by the Company, results in the consolidated revenues of the Company being not less than $15,000,000; or c) the Company grows a similar business organically within mPhase to include contracts generating revenues in excess of $15,000,000; or d) the Company meets the listing requirements of either the NYSE or NASDAQ
Stock-based compensation | $								$ 2,492,697
Mr. Bhatnagar [Member] | Warrant Agreement - Accelerated Warrants [Member] | Maximum [Member]
Issuance of common stock to accredited investors in private placements							37,390,452
Revenue | $							$ 30,000,000
Former Officers [Member]
Issuance of common stock for conversion of related party debts and strategic consultants, shares							62,000
Issuance of common stock for conversion of related party debts and strategic consultants | $							$ 46,500
Officers [Member]
Share issued price per share | $ / shares		$ 0.50						$ 0.50
Issuance of common stock for conversion of related party debts and strategic consultants | $							$ 1,883,445
Coomon stock to be issued for conversion of related party debts and strategic consultants, shares							329,553
Common Stock [Member]
Issuance of common stock to accredited investors in private placements							1,129,577	640,000
Issuance of common stock for services, shares							62,000	1,150,000
Issuance of common stock for services | $							$ 620	$ 11,500
Number of shares issued on restricted shares, shares							115,818
Issuance of common stock for conversion of related party debts and strategic consultants, shares								3,898,733
Issuance of common stock for conversion of related party debts and strategic consultants | $								$ 38,987
Issuance of common stock for conversions of convertible promissory notes | $							$ 58,724
Common Stock [Member] | Messrs Durando, Dotoli and Smiley [Member]
Issuance of common stock for services, shares								800,000
Issuance of common stock for services | $								$ 400,000
Common Stock [Member] | Mr. Biderman [Member]
Issuance of common stock for services, shares								200,000
Issuance of common stock for services | $								$ 100,000
Common Stock [Member] | Strategic Consultants [Member]
Issuance of common stock for services, shares								150,000
Issuance of common stock for services | $								$ 75,000
Private Placement [Member]
Proceeds from sale of common stock | $							$ 347,000	$ 193,000
Issuance of common stock to accredited investors in private placements							1,129,577	640,000
Private placement, finder fees, shares							11,003
Private placement, finder fees | $							$ 11,250
Private Placement [Member] | Continuing Operations Share Reserve [Member]
Common stock, capital shares reserved for future issuance							500,000
Exercise price of warrants | $ / shares							$ 0.25
Private Placement [Member] | Common Stock [Member]
Issuance of common stock to accredited investors in private placements								132,000
Subsequent Event [Member]
Common stock, shares authorized									500,000,000	250,000,000	250,000,000
Debt conversion, converted instrument, common stock issued						16,331,766
Series A Preferred Stock [Member]
Preferred stock, shares authorized							1,000
Series A Preferred Stock [Member] | Mr. Bhatnagar [Member]
Preferred stock, shares issued																						1,000