| Document and Entity Information | Jan. 03, 2022 |
| Cover [Abstract] | |
| Entity Registrant Name | ABRAXAS PETROLEUM CORP |
| Amendment Flag | false |
| Entity Central Index Key | 0000867665 |
| Current Fiscal Year End Date | --12-31 |
| Document Type | 8-K |
| Document Period End Date | Jan. 3, 2022 |
| Entity Incorporation State Country Code | NV |
| Entity File Number | 1-16071 |
| Entity Tax Identification Number | 74-2584033 |
| Entity Address, Address Line One | 18803 Meisner Drive |
| Entity Address, City or Town | San Antonio |
| Entity Address, State or Province | TX |
| Entity Address, Postal Zip Code | 78258 |
| City Area Code | 210 |
| Local Phone Number | 490-4788 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Security 12b Title | Common Stock, par value $.01 per share |
| Trading Symbol | AXAS |
