Basis of Presentation and Significant Accounting Policies [Text Block] | 1. The accounting policies followed by Abraxas Petroleum Corporation and its subsidiaries (the “Company”) are set forth in the notes to the Company’s audited consolidated financial statements in the Annual Report on Form 10 December 31, 2018 March 15, 2019. not not not three six June 30, 2019 not 10 December 31, 2018 Reclassifications Certain reclassifications have been made to the prior period financial statements to conform to the current period presentation. These reclassifications had no effect on the Company’s previously reported results of operations. Consolidation Principles The terms “Abraxas,” “Abraxas Petroleum,” “we,” “us,” “our” or the “Company” refer to Abraxas Petroleum Corporation and all of its subsidiaries, including Raven Drilling, LLC (“Raven Drilling”). Rig Accounting In accordance with SEC Regulation S- X, no income is recognized in connection with contractual drilling services performed in connection with properties in which the Company or its affiliates hold an ownership, or other economic interest. Any income not recognized as a result of this limitation is credited to the full cost pool and recognized through lower amortization as reserves are produced. Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the date of the financial statements and reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Recently Adopted Lease Accounting Standard In February 2016, an accounting standards update was issued that requires an entity to recognize a right-of-use (“ROU”) asset and lease liability for certain leases. Classification of leases as either a finance or operating lease determines the recognition, measurement and presentation of expenses. This accounting standards update also requires certain quantitative and qualitative disclosures about leasing arrangements. The new standard was effective for us in the first quarter of 2019 and we adopted the new standard using a modified retrospective approach, with the date of initial application on January 1, 2019. Consequently, upon transition, we recognized an ROU asset (or operating lease right-of-use asset) and a lease liability with no retained earnings impact. We are applying the following practical expedients as provided in the standards update which provide elections to: ● Not apply the recognition requirements to short-term leases (a lease that at commencement date has a lease term of 12 months or less); ● Not reassess whether a contract contains a lease, lease classification and initial direct costs; and ● Not reassess certain land easements in existence prior to January 1, 2019. The impact of adoption of this new standard on our balance sheet was as follows: January 1, 2019 Operating lease ROU asset $ 687 Operating lease liability - current $ (108 ) Operating lease liability - long-term $ (579 ) Leases acquired to explore for or use minerals, oil or natural gas resources, including the right to explore for those natural resources and rights to use the land in which those natural resources are contained, are not within the scope of the standards update. For more information, see Note 8. Stock-Based Compensation and Option Plans Stock Options The Company currently utilizes a standard option-pricing model (i.e., Black-Scholes) to measure the fair value of stock options granted to employees and directors. The following table summarizes the Company’s stock-based compensation expense related to stock options for the periods presented: Three Months Ended Six Months Ended June 30, June 30, 2019 2018 2019 2018 $ 74 $ 574 $ 225 $ 914 The following table summarizes the Company’s stock option activity for the six months ended June 30, 2019 : Number of Shares Weighted Average Option Exercise Price Per Share Weighted Average Grant Date Fair Value Per Share Outstanding, December 31, 2018 7,549 $ 2.37 $ 1.68 Granted — — — Exercised (469 ) $ 0.98 $ 0.68 Forfeited (572 ) $ 3.00 $ 2.12 Outstanding, June 30, 2019 6,508 $ 2.41 $ 1.71 As of June 30, 2019 , there was approximately $0.3 million of unamortized compensation expense related to outstanding stock options that will be recognized from 2019 through 2022. Restricted Stock Awards Restricted stock awards are awards of common stock that are subject to restrictions on transfer and to a risk of forfeiture if the recipient of the award terminates employment with the Company prior to the lapse of the restrictions. The fair value of such stock was determined using the closing price on the grant date and compensation expense is recorded over the applicable vesting periods. The following table summarizes the Company’s restricted stock activity for the six months ended June 30, 2019 : Number of Shares (thousands) Weighted Average Grant Date Fair Value Per Share Unvested, December 31, 2018 827 $ 2.15 Granted 1,315 $ 1.34 Vested/Released (228 ) $ 2.22 Forfeited — $ - Unvested, June 30, 2019 1,914 $ 1.59 The following table summarizes the Company’s stock-based compensation expense related to restricted stock for the periods presented: Three Months Ended Six Months Ended June 30, June 30, 2019 2018 2019 2018 $ 277 $ 221 $ 420 $ 468 As of June 30, 2019 , there was approximately $2.5 million of unamortized compensation expense relating to outstanding restricted shares that will be recognized from 2019 through 2022. Performance Based Restricted Stock The Company issues performance-based shares of restricted stock to certain officers and employees under the Abraxas Petroleum Corporation Amended and Restated 2005 Employee Long-Term Equity Incentive Plan. The shares will vest in three years from the grant date upon the achievement of performance goals based on the Company’s Total Shareholder Return (“TSR”) as compared to a peer group of companies. The number of shares which would vest depends upon the rank of the Company’s TSR as compared to the peer group at the end of the three -year vesting period, and can range from zero percent of the initial grant up to 200% of the initial grant. The table below provides a summary of Performance Based Restricted Stock as of the date indicated: Number of Shares (thousands) Weighted Average Grant Date Fair Value Per Share Unvested, December 31, 2018 405 $ 2.37 Granted 803 $ 1.34 Vested/Released — $ - Forfeited — $ - Unvested, June 30, 2019 1,208 $ 1.69 Compensation expense associated with the performance based restricted stock is based on the grant date fair value of a single share as determined using a Monte Carlo Simulation model which utilizes a stochastic process to create a range of potential future outcomes given a variety of inputs. As the Compensation Committee intends to settle the performance based restricted stock awards with shares of the Company's common stock, the awards are accounted for as equity awards and the expense is calculated on the grant date assuming a 100% target payout and amortized over the life of the awards. The following table summarizes the Company’s stock-based compensation expense related to performance based restricted stock for the periods presented: Three Months Ended Six Months Ended June 30, June 30, 2019 2018 2019 2018 $ 170 $ 84 $ 249 $ 84 As of June 30, 2019 , there was approximately $1.6 million of unamortized compensation expense relating to outstanding performance based restricted shares that will be recognized from 2019 through 2022. Oil and Gas Properties The Company follows the full cost method of accounting for oil and gas properties. Under this method, all direct costs and certain indirect costs associated with the acquisition of properties and successful as well as unsuccessful exploration and development activities are capitalized. Depreciation, depletion, and amortization of capitalized oil and gas properties and estimated future development costs, excluding unproved properties, are based on the unit-of-production method based on proved reserves. Net capitalized costs of oil and gas properties, less related deferred taxes, are limited by country, to the lower of unamortized cost or the cost ceiling, defined as the sum of the present value of estimated future net revenues from proved reserves based on unescalated prices discounted at 10%, plus the cost of properties not being amortized, if any, plus the lower of cost or estimated fair value of unproved properties included in the costs being amortized, if any, less related income taxes. Costs in excess of the present value of estimated net revenue from proved reserves discounted at 10% are charged to proved property impairment expense. No gain or loss is recognized upon sale or disposition of oil and gas properties for full cost accounting companies with proceeds accounted for as an adjustment of capitalized cost. An exception to this rule occurs when the adjustment to the full cost pool results in a significant alteration of the relationship between capitalized cost and proved reserves. The Company applies the full cost ceiling test on a quarterly basis on the date of the latest balance sheet presented. At June 30, 2019 and 2018 , our net capitalized costs of oil and gas properties did not exceed the cost ceiling of our estimated proved reserves. In May 2019, the Company closed on the sale of its non-operated assets in the Bakken. Proceeds from the sale of approximately $15.8 million were used to reduce outstanding indebtedness under its credit facility. In accordance with full cost accounting rules, the sale was not deemed to be singnificant,; therefore, no gain or loss was recorded and the proceeds were credited to the full cost pool. Restoration, Removal and Environmental Liabilities The Company is subject to extensive federal, state and local environmental laws and regulations. These laws regulate the discharge of materials into the environment and may require the Company to remove or mitigate the environmental effects of the disposal or release of petroleum substances at various sites. Environmental expenditures are expensed or capitalized depending on their future economic benefit. Expenditures that relate to an existing condition caused by past operations and that have no future economic benefit are expensed. Liabilities for expenditures of a non-capital nature are recorded when environmental assessments and/or remediation is probable, and the costs can be reasonably estimated. Such liabilities are generally undiscounted unless the timing of cash payments for the liability or component is fixed or reliably determinable. The Company accounts for future site restoration obligations based on the guidance of ASC 410 which addresses accounting and reporting for obligations associated with the retirement of tangible long-lived assets and the associated asset retirement costs. ASC 410 requires that the fair value of a liability for an asset's retirement obligation be recorded in the period in which it is incurred and the corresponding cost capitalized by increasing the carrying amount of the related long-lived asset. The liability is accreted to its then present value each period, and the capitalized cost is depreciated over the estimated useful life of the related asset. For all periods presented, we have included estimated future costs of abandonment and dismantlement in our full cost amortization base and amortize these costs as a component of our depletion expense in the accompanying condensed consolidated financial statements. The following table summarizes the Company’s future site restoration obligation transactions for the six months ended June 30, 2019 and the year ended December 31, 2018 : June 30, 2019 December 31, 2018 Beginning future site restoration obligation $ 7,492 $ 8,775 New wells placed on production and other 80 612 Deletions related to property disposals and plugging costs (487 ) (2,270 ) Accretion expense 220 516 Revisions and other 458 (141 ) Ending future site restoration obligation $ 7,763 $ 7,492 |