| Cover | Feb. 14, 2022 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Feb. 14, 2022 |
| Current Fiscal Year End Date | --12-31 |
| Entity File Number | 001-33228 |
| Entity Registrant Name | Zion Oil & Gas, Inc. |
| Entity Central Index Key | 0001131312 |
| Entity Tax Identification Number | 20-0065053 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 12655 North Central Expressway |
| Entity Address, Address Line Two | Suite 1000 |
| Entity Address, City or Town | Dallas |
| Entity Address, State or Province | TX |
| Entity Address, Postal Zip Code | 75243 |
| City Area Code | 214 |
| Local Phone Number | 221-4610 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
