| Document and Entity Information | Sep. 21, 2021 |
| Registrant CIK | 0001267919 |
| Fiscal Year End | --12-31 |
| Document Type | 8-K |
| Document Period End Date | Sep. 21, 2021 |
| Document Effective Date | Sep. 21, 2021 |
| Entity Registrant Name | SIGNATURE DEVICES INC |
| Entity Incorporation, State or Country Code | WY |
| Entity File Number | 000-53349 |
| Entity Tax Identification Number | 87-2230335 |
| Entity Address, Address Line One | 30 Shadow Brook Lane |
| Entity Address, City or Town | Lander |
| Entity Address, State or Province | WY |
| Entity Address, Postal Zip Code | 82520 |
| Entity Address, Address Description | Address of principal executive offices |
| City Area Code | 650 |
| Local Phone Number | 654-4800 |
| Phone Fax Number Description | Registrant’s telephone number, including area code |
| Written Communications | true |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | false |
| Amendment Flag | false |
| Document Fiscal Year Focus | 2021 |
| Document Fiscal Period Focus | FY |
| Former Address | |
| Entity Address, Address Line One | 30 N. Gould Street |
| Entity Address, City or Town | Sheridan |
| Entity Address, State or Province | WY |
| Entity Address, Postal Zip Code | 82801 |
| Entity Address, Address Description | Former name or former address, if changed since last report. |
| Entity Address, Address Line Two | Suite 5187 |
