Subsequent Events	9 Months Ended
Subsequent Events	Sep. 30, 2020
Subsequent Events [Abstract]
Subsequent Events	Subsequent Event Reverse Stock Split. On October 20, 2020, the Company announced a reverse stock split of the Company’s outstanding shares of common stock at a ratio of 1-for-50 and a proportionate reduction of the total number of authorized shares of common stock, which was approved by the stockholders at the Company’s Annual Meeting of Stockholders on April 28, 2020. The reverse stock split became effective on October 30, 2020, and the Company’s common stock was traded on a split-adjusted basis on the NYSE at the market open on that date. The par value of the common stock was not adjusted as a result of the reverse stock split. The reverse stock split is intended to increase the per share trading price of the Company’s common stock to satisfy the $1.00 minimum closing price requirement for continued listing on the NYSE. As a result of the reverse stock split, every 50 pre-split shares of common stock outstanding were automatically combined into one issued and outstanding share of common stock. The fractional shares that resulted from the reverse stock split were canceled and paid out in cash. The reverse stock split reduced the number of shares of the Company’s outstanding common stock from 215,255,925 shares as of October 30, 2020 to 4,305,119 shares, subject to adjustment of the rounding of fractional shares. The total number of shares of common stock that the Company is authorized to issue was reduced from 400,000,000 to 8,000,000 shares. All share and per share amounts in the consolidated financial statements and notes herein were retroactively adjusted for all periods presented to give effect to this reverse stock split, including reclassifying an amount equal to the reduction in par value of the Company’s common stock to additional paid-in capital. Merger. On November 8, 2020, the Company and Bonanza Creek Energy, Inc., a Delaware corporation (“Bonanza Creek”), entered into a definitive merger agreement (“Merger Agreement”) to effectuate the strategic combination of Bonanza Creek and HighPoint. The transaction has been unanimously approved by the board of directors of each company. Under the terms of the Merger Agreement, Bonanza Creek has agreed to commence a registered exchange offer (the “Exchange Offer”). The Exchange Offer will be conditioned on a minimum participation condition of not less than 95% of the aggregate outstanding principal amount of HighPoint senior unsecured notes (the “HighPoint Notes”) and not less than a majority of the outstanding holders of the HighPoint Notes (the “Minimum Participation Condition”). If the Minimum Participation Condition is not met, HighPoint has agreed to solicit a prepackaged plan of reorganization under Chapter 11 of the United States Bankruptcy Code in the United States Bankruptcy Court for the [District of Delaware] (the “Court,” and such plan, the “Prepackaged Plan”). HighPoint will file voluntary petitions under Chapter 11 with the Court to effectuate the Prepackaged Plan, under which the companies will seek to consummate the merger. If the Minimum Participation Condition is met, and if certain customary closing conditions are satisfied (including approval by each company’s shareholders, provided that approval of HighPoint shareholders will not be required under the Prepackaged Plan), the companies will effect the Exchange Offer and Bonanza Creek will acquire HighPoint at closing through a merger outside of bankruptcy. The transactions are expected to close in the first quarter of 2021 under the Exchange Offer or in the second quarter of 2021 under the Prepackaged Plan.