| Cover | Jan. 09, 2020 |
| Cover page. | |
| Amendment Flag | false |
| Document Type | 8-K |
| Document Period End Date | Jan. 9, 2020 |
| Entity Registrant Name | JAGGED PEAK ENERGY INC. |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 001-37995 |
| Entity Tax Identification Number | 81-3943703 |
| Entity Address, Address Line One | 1401 Lawrence St., Suite 1800 |
| Entity Address, City or Town | Denver |
| Entity Address, State or Province | CO |
| Entity Address, Postal Zip Code | 80202 |
| City Area Code | 720 |
| Local Phone Number | 215-3700 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Title of 12(b) Security | Common stock, par value $0.01 per share |
| Trading Symbol | JAG |
| Security Exchange Name | NYSE |
| Entity Central Index Key | 0001685715 |
