CytoDyn Inc. Annual report pursuant to Section 13 and 15(d)

Annual report pursuant to Section 13 and 15(d)

Related Party Transactions (Details)

Related Party Transactions (Details)																														1 Months Ended		2 Months Ended		12 Months Ended
Related Party Transactions (Details)	Apr. 02, 2021 USD ($) $ / shares shares	Mar. 18, 2021 USD ($) shares	Jan. 28, 2021 USD ($) shares	Dec. 08, 2020 USD ($) $ / shares shares	Dec. 04, 2020 USD ($) $ / shares shares	Nov. 30, 2020 USD ($) $ / shares shares	Nov. 17, 2020 USD ($) $ / shares shares	Oct. 26, 2020 USD ($) shares	Oct. 14, 2020 USD ($) $ / shares shares	Jun. 17, 2020 USD ($) shares	Mar. 13, 2020 $ / shares shares	Mar. 04, 2020 USD ($) $ / shares shares	Feb. 28, 2020 USD ($) shares	Feb. 26, 2020 USD ($) $ / shares shares	Jan. 31, 2020 USD ($) $ / shares shares	Dec. 30, 2019 USD ($) $ / shares shares	Dec. 23, 2019 USD ($) shares	Dec. 20, 2019 USD ($) shares	Dec. 13, 2019 USD ($) shares	Oct. 08, 2019 USD ($) shares	Oct. 07, 2019 item $ / shares shares	Sep. 30, 2019 USD ($) shares	Sep. 12, 2019 $ / shares shares	Jul. 31, 2019 USD ($) $ / shares shares	Jul. 15, 2019 item	Dec. 19, 2018 USD ($) shares	Dec. 18, 2018 USD ($)	Nov. 16, 2018 shares	Jul. 10, 2018 shares	Jul. 31, 2021 USD ($)	Jan. 31, 2020 USD ($) $ / shares shares	Jul. 23, 2021 shares	Nov. 14, 2019 USD ($)	May 31, 2021 USD ($) $ / shares shares	May 31, 2020 USD ($) $ / shares shares	May 31, 2019 USD ($) $ / shares shares	Aug. 31, 2019 $ / shares shares	Jun. 12, 2019 $ / shares shares	May 08, 2019 shares	Jan. 08, 2019 USD ($) $ / shares shares
Related Party Transaction [Line Items]
Common stock, outstanding																																		625,680,000	518,976,000
Shares restricted from transfer																																		8,300,000
Warrants to purchase common shares, shares											300,000																										2,600,000
Exercise price of warrants, per share \| $ / shares											$ 1.00																										$ 0.50
Inducement shares, percentage																																						50.00%
Debt instrument converted into equity value \| $																																		$ 77,703,000	$ 15,092,000	$ 1,680,000
Stock price, in dollars per share \| $ / shares																																		$ 1.50		$ 0.50
Common Stock, Par or Stated Value Per Share \| $ / shares					$ 0.001				$ 0.001															$ 0.001										$ 0.001	$ 0.001
Subsequent Event
Related Party Transaction [Line Items]
Stock issued during the period new issues																																600,000
Series D Convertible Preferred Stock
Related Party Transaction [Line Items]
Stock issued during the period new issues											882				7,570
Stock price, in dollars per share \| $ / shares											$ 1,000.00				$ 1,000.00																$ 1,000.00
ProstaGene, LLC
Related Party Transaction [Line Items]
Common stock, outstanding																												13,300,000
Shares held in escrow																												5,400,000
Restricted shares, release interval																												6 months
Restricted shares, period of restriction																												18 months
Private Warrant Exchange [Member]
Related Party Transaction [Line Items]
Warrants to purchase common shares, shares																																		37,100,000
Exercise price of warrants, per share \| $ / shares	$ 0.45			$ 0.30	$ 0.45	$ 0.75						$ 0.75			$ 0.50	$ 0.50															$ 0.50
Stock issued during the period new issues	1,100,000	200,000	3,600,000	2,000,000.0	300,000	500,000		5,000,000.0	7,000,000.0	16,500,000		88,000	8,600,000			2,700,000		4,700,000						11,300,000							4,400,000
Proceeds from issuance of common shares \| $	$ 700,000	$ 100,000	$ 2,900,000	$ 400,000	$ 100,000	$ 300,000		$ 1,600,000	$ 2,700,000	$ 7,400,000		$ 36,000	$ 2,200,000			$ 1,100,000		$ 800,000						$ 3,000,000.0							$ 1,900,000
Stock price, in dollars per share \| $ / shares	$ 0.90			$ 0.24	$ 0.36	$ 0.60						$ 0.45				$ 0.50								$ 0.40
Private Warrant Exchange, Inducement Shares [Member]
Related Party Transaction [Line Items]
Stock issued during the period new issues	300,000	100,000										8,000	800,000			500,000		1,300,000						3,800,000							400,000
Private Warrant Exchange, Non-Inducement Shares [Member]
Related Party Transaction [Line Items]
Stock issued during the period new issues	800,000	100,000										80,000	7,800,000			2,200,000		3,400,000						7,500,000							4,000,000.0
Two Thousand And Nineteen Short Term Convertible Notes [Member]
Related Party Transaction [Line Items]
Convertible notes, interest rate																																				10.00%
Convertible note, aggregate principal \| $																																			$ 5,460,000	$ 5,460,000
Warrants to purchase common shares, shares																																				5,460,000
Exercise price of warrants, per share \| $ / shares																																				$ 0.30
Principal amount of debt converted \| $																																	$ 200,000		5,154,000
Denis R. Burger, Ph D [Member]
Related Party Transaction [Line Items]
Shares covered by accelerated vesting																													500,000
A Bruce Montgomery
Related Party Transaction [Line Items]
Shares covered by accelerated vesting																													100,000
Anthony D Caracciolo
Related Party Transaction [Line Items]
Monthly salary \| $																										$ 5,000	$ 16,667
Options with extended expiration																										150,000
Options term																										10 years
Dr Kelly And Dr Welch
Related Party Transaction [Line Items]
Options term																					10 years		10 years
Number of vesting installments \| item																					4
Number of directors \| item																									2
Scott A Kelly
Related Party Transaction [Line Items]
Warrants to purchase common shares, shares																																						50,000
Exercise price of warrants, per share \| $ / shares																																						$ 0.40
Stock options aggregate awarded shares																					200,000		750,000
Stock option granted, exercise price \| $ / shares																					$ 0.39		$ 0.385
Scott A Kelly \| Private Warrant Exchange, Inducement Shares [Member]
Related Party Transaction [Line Items]
Warrants to purchase common shares, shares																																						25,000
David F Welch
Related Party Transaction [Line Items]
Warrants to purchase common shares, shares														2,000,000.0	500,000		800,000							1,000,000.0							500,000
Exercise price of warrants, per share \| $ / shares														$ 0.30
Stock options aggregate awarded shares																					200,000		250,000
Stock option granted, exercise price \| $ / shares																					$ 0.39		$ 0.385
Stock issued during the period new issues														1,800,000			1,600,000
Proceeds from issuance of common shares \| $														$ 330,000			$ 500,000
Proceeds from issuance of preferred stock and warrants \| $															$ 1,000,000.0
Stock price, in dollars per share \| $ / shares														$ 0.18
David F Welch \| Series D Convertible Preferred Stock
Related Party Transaction [Line Items]
Stock issued during the period new issues															1,000
David F Welch \| Private Warrant Exchange, Inducement Shares [Member]
Related Party Transaction [Line Items]
Warrants to purchase common shares, shares																								500,000															800,000
Stock issued during the period new issues														200,000
David F Welch \| Private Warrant Exchange, Non-Inducement Shares [Member]
Related Party Transaction [Line Items]
Warrants to purchase common shares, shares																																							1,700,000
David F Welch \| Two Thousand And Nineteen Short Term Convertible Notes [Member]
Related Party Transaction [Line Items]
Principal amount of debt converted \| $																						$ 1,000,000.0
Accrued but unpaid interest \| $																						75,343
Debt instrument converted into equity value \| $																						$ 1,100,000
Warrants issued in debt conversion																						1,000,000.0
Dr Richard G Pestell \| ProstaGene, LLC
Related Party Transaction [Line Items]
Percentage of outstanding equity interest																												77.20%
Common stock, outstanding																												8,600,000
Shares held in escrow																												4,200,000
Shares restricted from transfer																												8,300,000
Jordan G. Naydenov
Related Party Transaction [Line Items]
Warrants to purchase common shares, shares																			600,000
Stock issued during the period new issues																			800,000
Proceeds from issuance of common shares \| $																			$ 250,000
Michael A Klump [Member]
Related Party Transaction [Line Items]
Warrants to purchase common shares, shares																																								500,000
Exercise price of warrants, per share \| $ / shares																																								$ 0.30
Michael A Klump [Member] \| Private Warrant Exchange, Inducement Shares [Member]
Related Party Transaction [Line Items]
Warrants to purchase common shares, shares																																							1,800,000
Michael A Klump [Member] \| Private Warrant Exchange, Non-Inducement Shares [Member]
Related Party Transaction [Line Items]
Warrants to purchase common shares, shares																																							3,600,000
Michael A Klump [Member] \| Long Term Convertible Note January 2019
Related Party Transaction [Line Items]
Convertible notes, interest rate																																								10.00%
Convertible note, aggregate principal \| $																																								$ 500,000
Michael A Klump [Member] \| Two Thousand And Nineteen Short Term Convertible Notes [Member]
Related Party Transaction [Line Items]
Principal amount of debt converted \| $																				$ 500,000
Accrued but unpaid interest \| $																				37,397
Debt instrument converted into equity value \| $																				$ 500,000
Warrants issued in debt conversion																				500,000
Christopher Recknor [Member]
Related Party Transaction [Line Items]
Stock issued during the period new issues							700,000
Proceeds from issuance of common shares \| $							$ 1,000,000.0
Stock price, in dollars per share \| $ / shares							$ 1.50
Immediate Family Member of Management or Principal Owner [Member]
Related Party Transaction [Line Items]
Related party transactions, amount \| $																																		$ 900,000	$ 0
Accounts Payable, Related Parties \| $																																		$ 900,000
Immediate Family Member of Management or Principal Owner [Member] \| Subsequent Event
Related Party Transaction [Line Items]
Related party transactions, amount \| $																														$ 100,000