Document And Entity Information - USD ($)	12 Months Ended
	May 31, 2025	Aug. 29, 2025	Nov. 29, 2024
Document Information [Line Items]
Document Type	10-K
Document Annual Report	true
Document Period End Date	May 31, 2025
Document Transition Report	false
Entity File Number	000-26331
Entity Registrant Name	GREYSTONE LOGISTICS, INC.
Entity Incorporation, State or Country Code	OK
Entity Tax Identification Number	75-2954680
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
Title of 12(g) Security	Common Stock, $0.0001 par value
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
ICFR Auditor Attestation Flag	false
Document Financial Statement Error Correction [Flag]	false
Entity Shell Company	false
Entity Public Float			$ 12,083,372
Entity Common Stock, Shares Outstanding (in shares)		27,270,701
Auditor Firm ID	483
Auditor Name	HoganTaylor LLP
Auditor Location	Tulsa, Oklahoma
Entity Central Index Key	0001088413
Current Fiscal Year End Date	--05-31
Document Fiscal Year Focus	2025
Document Fiscal Period Focus	FY
Amendment Flag	false