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

Quarterly report pursuant to Section 13 or 15(d)

Subsequent Events (Detail)

Subsequent Events (Detail) - USD ($) $ / shares in Units, $ in Thousands, shares in Millions				1 Months Ended		3 Months Ended
	Oct. 05, 2021	Sep. 29, 2021	Aug. 31, 2021	Oct. 01, 2021	Sep. 23, 2021	Aug. 31, 2021	May 31, 2021	Apr. 02, 2021
Long-term Convertible Note - April 2, 2021 Note
Subsequent Event [Line Items]
Convertible note, aggregate principal								$ 28,500
Outstanding balance of convertible note including accrued unpaid interest			$ 26,906			$ 26,906	$ 25,715
Private Warrant Exchange [Member]
Subsequent Event [Line Items]
Stock issued during the period new issues						1.3
Private Warrant Exchange [Member] \| Maximum
Subsequent Event [Line Items]
Class of warrants, exercise price			$ 0.75			$ 0.75
Private Warrant Exchange [Member] \| Minimum
Subsequent Event [Line Items]
Class of warrants, exercise price			0.45			$ 0.45
Private Warrant Exchange, Inducement Shares [Member]
Subsequent Event [Line Items]
Stock issued during the period new issues						0.7
Private Warrant Exchange, Non-Inducement Shares [Member]
Subsequent Event [Line Items]
Stock issued during the period new issues						0.7
Private Placement [Member]
Subsequent Event [Line Items]
Stock price, in dollars per share			1.00			$ 1.00
Stock Subscription Agreements [Member]
Subsequent Event [Line Items]
Stock price, in dollars per share			1.00			1.00
Class of warrants, exercise price			$ 1.00			$ 1.00
Stock issued during the period new issues			2.9
Proceeds from issuance of common stock			$ 2,900
Common stock warrants to purchase shares			0.7			0.7
Term of warrants			5 years			5 years
Subsequent Event \| Long-term Convertible Note - April 2, 2021 Note
Subsequent Event [Line Items]
Outstanding balance of convertible note including accrued unpaid interest	$ 24,800
Subsequent Event \| October 2021 Partitioned Notes [Member]
Subsequent Event [Line Items]
Convertible note, aggregate principal	$ 2,500
Shares issued on debt conversion	1.7
Subsequent Event \| Private Warrant Exchange [Member]
Subsequent Event [Line Items]
Stock issued during the period new issues					6.1
Proceeds from issuance of common stock					$ 4,300
Subsequent Event \| Private Warrant Exchange [Member] \| Maximum
Subsequent Event [Line Items]
Class of warrants, exercise price					$ 1.00
Subsequent Event \| Private Warrant Exchange [Member] \| Minimum
Subsequent Event [Line Items]
Class of warrants, exercise price					$ 0.45
Subsequent Event \| Private Warrant Exchange, Inducement Shares [Member]
Subsequent Event [Line Items]
Stock issued during the period new issues					3.5
Subsequent Event \| Private Warrant Exchange, Non-Inducement Shares [Member]
Subsequent Event [Line Items]
Stock issued during the period new issues					2.5
Subsequent Event \| Exercise Of Warrants And Options, Combined [Member]
Subsequent Event [Line Items]
Stock issued during the period new issues				0.4
Common stock warrants to purchase shares				0.5
Warrants and stock options exercised, value				$ 100
Subsequent Event \| Exercise Of Warrants And Options, Combined [Member] \| Maximum
Subsequent Event [Line Items]
Class of warrants, exercise price				$ 1.00
Subsequent Event \| Exercise Of Warrants And Options, Combined [Member] \| Minimum
Subsequent Event [Line Items]
Class of warrants, exercise price				$ 0.40
Subsequent Event \| Stock Subscription Agreements [Member]
Subsequent Event [Line Items]
Stock issued during the period new issues		9.4
Proceeds from issuance of common stock		$ 10,900
Common stock warrants to purchase shares		2.3
Term of warrants		5 years
Subsequent Event \| Stock Subscription Agreements [Member] \| Maximum
Subsequent Event [Line Items]
Stock price, in dollars per share		$ 1.80
Stock option granted, exercise price		1.80
Subsequent Event \| Stock Subscription Agreements [Member] \| Minimum
Subsequent Event [Line Items]
Stock price, in dollars per share		1.00
Stock option granted, exercise price		$ 1.00