Warrants At Relative Fair Value and Beneficial Conversion Feature at Intrinsic Value (Details)	1 Months Ended
Jan. 30, 2019 USD ($)
Convertible Promisssory Notes [Abstract]
Warrants At Fair Value Of Redemption Provision	$ 1,465,008
Relative Fair Value Of Equity Classified Warrants	858,353
Warrants At Beneficial Conversion Feature	2,676,639
Net proceeds of January 2019 Note	$ 5,000,000

Proceeds from issuance of convertible promissory notes.

No definition available.

Name:	cydy_ProceedsFromIssuanceOfConvertiblePromissoryNotes
Namespace Prefix:	cydy_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration