CytoDyn Inc. Quarterly report pursuant to Section 13 or 15(d)

Quarterly report pursuant to Section 13 or 15(d)

Related Party Transactions - Additional Information (Detail)

Related Party Transactions - Additional Information (Detail) - USD ($)											1 Months Ended
	Feb. 26, 2020	Feb. 21, 2020	Jan. 18, 2020	Dec. 23, 2019	Dec. 19, 2019	Dec. 13, 2019	Oct. 08, 2019	Oct. 07, 2019	Sep. 12, 2019	Jul. 15, 2019	Jan. 31, 2020	Sep. 30, 2019	Jan. 28, 2020	Dec. 30, 2019	Nov. 30, 2019	Jul. 31, 2019	Jun. 12, 2019
Related Party Transaction [Line Items]
Warrants to purchase common shares, shares															200,000
Warrant exercise price															$ 0.45
Stock option granted, Shares		265,000	296,986		7,300,000
Stock options, term		10 years	10 years					10 years	10 years
Percentage of Shares Issuable Upon Exercise Of Original Warrants																	50.00%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Exercise Price		$ 1.10
Series D Convertible Preferred Stock
Related Party Transaction [Line Items]
Share Price													$ 1,000
Private Warrant Exchange [Member]
Related Party Transaction [Line Items]
Share Price											$ 0.50			$ 0.50
Two Thousand And Nineteen Short Term Convertible Notes [Member]
Related Party Transaction [Line Items]
Convertible note, aggregate principal												$ 200,000
Convertible Promissory Notes [Member]
Related Party Transaction [Line Items]
Warrants to purchase common shares, shares															4,750,000
Jordan G. Naydenov \| Direct Equity Offering [Member]
Related Party Transaction [Line Items]
Warrants to purchase common shares, shares						625,000
Number of shares issued						833,333
Proceeds from non controlling interest holders due to sale of stock						$ 250,000
DrKelly [Member]
Related Party Transaction [Line Items]
Warrant exercise price																	$ 0.40
Stock option granted, Shares								187,500	750,000
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Exercise Price								$ 0.39	$ 0.385
DrKelly [Member] \| Additional Shares [Member]
Related Party Transaction [Line Items]
Warrants to purchase common shares, shares																	25,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized																	50,000
DrWelch [Member]
Related Party Transaction [Line Items]
Stock option granted, Shares								187,500	250,000
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Exercise Price								$ 0.39	$ 0.385
DrWelch [Member] \| Two Thousand And Nineteen Short Term Convertible Notes [Member]
Related Party Transaction [Line Items]
Accrued but unpaid interest												75,343
DrWelch [Member] \| Two Thousand And Nineteen Short Term Convertible Notes [Member] \| Tranche Two [Member]
Related Party Transaction [Line Items]
Convertible note, aggregate principal												$ 1,000,000
DrWelch [Member] \| Convertible Promissory Notes [Member]
Related Party Transaction [Line Items]
Warrants to purchase common shares, shares												1,000,000
Convertible note, aggregate principal												$ 1,075,343
DavidF Welch [Member]
Related Party Transaction [Line Items]
Warrants to purchase common shares, shares											500,000					1,000,000
Proceeds from non controlling interest holders due to sale of stock											$ 1,000,000
DavidF Welch [Member] \| Series D Convertible Preferred Stock
Related Party Transaction [Line Items]
Number of shares issued											1,000
DavidF Welch [Member] \| Private Warrant Exchange [Member]
Related Party Transaction [Line Items]
Warrants to purchase common shares, shares	2,001,639
Warrant exercise price	$ 0.30
Number of shares issued	1,819,672
Proceeds from non controlling interest holders due to sale of stock	$ 330,000
Share Price	$ 0.18
DavidF Welch [Member] \| Additional Shares [Member]
Related Party Transaction [Line Items]
Warrants to purchase common shares, shares																500,000
DavidF Welch [Member] \| Additional Shares [Member] \| Private Warrant Exchange [Member]
Related Party Transaction [Line Items]
Stock issued during period shares warrant exercise	181,967
DavidF Welch [Member] \| Direct Equity Offering [Member]
Related Party Transaction [Line Items]
Warrants to purchase common shares, shares				819,672
Number of shares issued				1,639,344
Proceeds from non controlling interest holders due to sale of stock				$ 500,000
DrKelly And DrWelch [Member]
Related Party Transaction [Line Items]
Stock option granted, Shares										1,375,000
Mr Klump [Member] \| Two Thousand And Nineteen Short Term Convertible Notes [Member]
Related Party Transaction [Line Items]
Accrued but unpaid interest							$ 37,397
Mr Klump [Member] \| Two Thousand And Nineteen Short Term Convertible Notes [Member] \| Tranche Two [Member]
Related Party Transaction [Line Items]
Accrued but unpaid interest							$ 500,000
Mr Klump [Member] \| Convertible Promissory Notes [Member]
Related Party Transaction [Line Items]
Warrants to purchase common shares, shares							500,000
Convertible note, aggregate principal							$ 537,397