| Document and Entity Information | Jun. 23, 2024 |
| Cover [Abstract] | |
| Entity Registrant Name | Gresham Worldwide, Inc. |
| Amendment Flag | false |
| Entity Central Index Key | 0000719274 |
| Document Type | 8-K |
| Document Period End Date | Jun. 23, 2024 |
| Entity Incorporation State Country Code | CA |
| Entity File Number | 001-14605 |
| Entity Tax Identification Number | 94-2656341 |
| Entity Address, Address Line One | 7272 E. Indian School Rd |
| Entity Address, Address Line Two | Suite 540 |
| Entity Address, City or Town | Scottsdale |
| Entity Address, State or Province | AZ |
| Entity Address, Postal Zip Code | 85251 |
| City Area Code | 833 |
| Local Phone Number | 457 6667 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
