Cover - USD ($)	12 Months Ended
	May 31, 2022	Aug. 12, 2022	Nov. 30, 2021
Cover [Abstract]
Document Type	10-K
Amendment Flag	false
Document Annual Report	true
Document Transition Report	false
Document Period End Date	May 31, 2022
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2022
Current Fiscal Year End Date	--05-31
Entity File Number	000-26331
Entity Registrant Name	GREYSTONE LOGISTICS, INC.
Entity Central Index Key	0001088413
Entity Tax Identification Number	75-2954680
Entity Incorporation, State or Country Code	OK
Entity Address, Address Line One	1613 East 15th Street
Entity Address, City or Town	Tulsa
Entity Address, State or Province	OK
Entity Address, Postal Zip Code	74120
City Area Code	(918)
Local Phone Number	583-7441
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Public Float			$ 15,079,000
Entity Common Stock, Shares Outstanding		28,279,701
Auditor Firm ID	483
Auditor Name	HoganTaylor LLP
Auditor Location	Tulsa, Oklahoma