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

Annual report pursuant to Section 13 and 15(d)

Subsequent Events (Detail)

Subsequent Events (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands																		1 Months Ended			2 Months Ended		3 Months Ended	12 Months Ended
	Jul. 27, 2021	Jun. 15, 2021	Apr. 02, 2021	Mar. 18, 2021	Jan. 28, 2021	Dec. 08, 2020	Dec. 04, 2020	Nov. 30, 2020	Nov. 10, 2020	Oct. 26, 2020	Oct. 14, 2020	Jun. 17, 2020	Mar. 04, 2020	Feb. 28, 2020	Dec. 30, 2019	Dec. 20, 2019	Jul. 31, 2019	Jul. 31, 2021	Jun. 30, 2021	Jan. 31, 2020	Jul. 23, 2021	Jul. 31, 2019	Nov. 30, 2020	May 31, 2021	May 31, 2020	May 31, 2019	Mar. 13, 2020	Aug. 31, 2019
Subsequent Event [Line Items]
Stock price, in dollars per share																								$ 1.50		$ 0.50
Class of warrants, exercise price																											$ 1.00	$ 0.50
Common stock par or stated value per share							$ 0.001				$ 0.001						$ 0.001					$ 0.001		$ 0.001	$ 0.001
Common stock warrants to purchase shares																											300	2,600
Debt instrument converted into equity value																								$ 77,703	$ 15,092	$ 1,680
Debt instrument converted number of shares issued																								19,900
Long-term Convertible Note - November 2020 Note
Subsequent Event [Line Items]
Debt Instrument, Face Amount									$ 28,500
Specified monthly redemption amount									7,500														$ 7,500
Outstanding balance of convertible note including accrued unpaid interest																								$ 13,554
Maximum
Subsequent Event [Line Items]
Class of warrants, exercise price																								$ 1.35
Maximum \| Long-term Convertible Note - November 2020 Note
Subsequent Event [Line Items]
Specified monthly redemption amount									$ 3,500
Minimum
Subsequent Event [Line Items]
Class of warrants, exercise price																								$ 0.30
Public Warrant Tender Offerings [Member]
Subsequent Event [Line Items]
Stock issued during the period new issues																						45,400
Proceeds from issuance of common stock																						$ 11,900
Noncash inducement interest expense																						$ 2,400
Public Warrant Tender Offerings [Member] \| Maximum
Subsequent Event [Line Items]
Stock price, in dollars per share																	0.40					$ 0.40
Public Warrant Tender Offerings [Member] \| Minimum
Subsequent Event [Line Items]
Stock price, in dollars per share																	0.30					0.30
Private Warrant Exchange [Member]
Subsequent Event [Line Items]
Stock price, in dollars per share			$ 0.90			$ 0.24	0.36	$ 0.60					$ 0.45		$ 0.50		$ 0.40					$ 0.40	$ 0.60
Class of warrants, exercise price			$ 0.45			$ 0.30	$ 0.45	$ 0.75					$ 0.75		$ 0.50					$ 0.50			$ 0.75
Stock issued during the period new issues			1,100	200	3,600	2,000	300	500		5,000	7,000	16,500	88	8,600	2,700	4,700	11,300			4,400
Proceeds from issuance of common stock			$ 700	$ 100	$ 2,900	$ 400	$ 100	$ 300		$ 1,600	$ 2,700	$ 7,400	$ 36	$ 2,200	$ 1,100	$ 800	$ 3,000			$ 1,900
Common stock warrants to purchase shares																								37,100
Noncash inducement interest expense			$ 100	$ 32	$ 3,400	$ 700	$ 100	$ 200		$ 1,400	$ 2,200	$ 3,300					$ 200							$ 11,400	$ 5,500
Private Warrant Exchange [Member] \| Maximum
Subsequent Event [Line Items]
Stock price, in dollars per share				$ 0.90	$ 0.75					$ 0.60	$ 0.80	$ 0.70		$ 0.45		$ 0.25
Class of warrants, exercise price				0.45	1.50					0.75	1.00	1.35		0.75		0.75
Private Warrant Exchange [Member] \| Minimum
Subsequent Event [Line Items]
Stock price, in dollars per share				0.60	0.45					0.24	0.24	0.21		0.18		0.22
Class of warrants, exercise price				$ 0.30	$ 0.90					$ 0.30	$ 0.30	$ 0.35		$ 0.30		$ 0.45
Private Warrant Exchange, Inducement Shares [Member]
Subsequent Event [Line Items]
Stock issued during the period new issues			300	100									8	800	500	1,300	3,800			400
Private Warrant Exchange, Non-Inducement Shares [Member]
Subsequent Event [Line Items]
Stock issued during the period new issues			800	100									80	7,800	2,200	3,400	7,500			4,000
Subsequent Event
Subsequent Event [Line Items]
Stock issued during the period new issues																					600
Warrants and stock options exercised, value																					$ 500
Shares issued, vesting of RSUs		400
Subsequent Event \| Long-term Convertible Note - November 2020 Note
Subsequent Event [Line Items]
Outstanding balance of convertible note including accrued unpaid interest																		$ 4,500	$ 7,900
Monthly redemption amount deferred	$ 3,500																	3,500	1,500
Subsequent Event \| June 2021 Partitioned Notes [Member]
Subsequent Event [Line Items]
Debt Instrument, Face Amount																			$ 6,000
Debt instrument converted number of shares issued																			4,200
Subsequent Event \| July 2021 Partitioned Notes [Member]
Subsequent Event [Line Items]
Debt Instrument, Face Amount	$ 4,000																	$ 4,000
Debt instrument converted number of shares issued	3,300																	3,300
Subsequent Event \| Maximum
Subsequent Event [Line Items]
Class of warrants, exercise price																					$ 1.35
Subsequent Event \| Minimum
Subsequent Event [Line Items]
Class of warrants, exercise price																					$ 0.45