Subsequent Events	12 Months Ended
Dec. 31, 2018
Subsequent Events [Abstract]
Subsequent Events	18. SUBSEQUENT EVENTS APEG II was the secured lender under the Company’s credit facility and is involved in litigation with the Company, as described in Item 1. Business—Litigation and Liquidity—APEG II Litigation and Note 11-Commitments, Contingencies and Related Party Transactions. As described above, the costs associated with the ongoing litigation have been a significant use of the Company’s existing cash. While the Company has historically funded all litigation costs out of operating cash flow, continued excessive legal fees associated with litigation could impair the Company’s liquidity profile and ability to fund significant drilling obligations. In March 2019, the Company paid off the entire outstanding balance under its credit agreement of approximately $0.9 million, and the credit facility matured in July 2019. In May 2019, the Company exchanged approximately 905 leasehold acres of the Georgetown formation and deeper rights in Dimmit and Zavala counties for working interests in certain wells that were drilled by CML Exploration in the first half of 2019. The effective date of the exchange was March 1, 2019. On December 19, 2018, the Company received a notification letter from The Nasdaq Stock Market LLC (“Nasdaq”) indicating that for 30 consecutive business days the Company’s common stock did not maintain a minimum closing bid price of $1.00 per share as required by Nasdaq Listing Rule 5550(a)(2). Consistent with the Rule, Nasdaq initially provided the Company with a compliance period of 180 calendar days, or until June 17, 2019, to regain compliance with the Rule. To regain compliance with the Rule, the closing bid price of the Company’s common stock must meet or exceed $1.00 per share for at least ten consecutive business days during this 180 calendar day period. On June 19, 2019, Nasdaq notified the Company that, although the Company has not regained compliance with the minimum $1.00 closing bid price per share requirement, Nasdaq has determined that the Company was eligible for an additional 180 calendar day period, or until December 16, 2019, to regain compliance with the minimum bid price requirement. The second 180-day period relates exclusively to the $1.00 closing bid price deficiency, and the Company may be delisted during the 180-day period for failure to maintain compliance with any other Nasdaq listing requirements for which the Company is currently on notice or which occurs during the 180-day period. On April 17, 2019, the Company received a letter (the “Notice”) from the Nasdaq notifying the Company that it was not in compliance with the requirement of Nasdaq Listing Rule 5250(c)(1) for continued listing as a result of the Company’s failure to timely file its Annual Report on Form 10-K for the fiscal year ended December 31, 2018. Pursuant to the Notice, the Company was required to submit to Nasdaq a plan to regain compliance with Nasdaq’s requirements for continued listing within 60 calendar days of the date of the Notice (by June 17, 2019). On May 21, 2019, the Company received another notice from Nasdaq notifying the Company that it was not in compliance with the requirement of Nasdaq Listing Rule 5250(c)(1) for continued listing on Nasdaq as a result of the delay in filing its quarterly report on Form 10-Q for the quarterly period ended March 31, 2019, and Nasdaq accelerated the date to submit the Company’s plan to meet Nasdaq’s continued listing requirements by May 23, 2019, which it complied with. Nasdaq granted the Company an exception to the Rule until September 16, 2019 to file this delinquent annual report on Form 10-K for the year ended December 31, 2019 and until October 14, 2019 to file its delinquent quarterly reports on Form 10-Q for the quarterly periods ended March 31, 2019 and June 30, 2019. On August 16, 2019, Nasdaq again notified the Company that it was not in compliance with Nasdaq Listing Rule 5250(c)(1) for continued listing due to the delay in filing the Company’s Quarterly Report on Form 10-Q for the quarterly period ended June 30, 2019. Previously, Nasdaq had granted the Company an exception until September 16, 2019 to file its delinquent Annual Report on Form 10-K for the year ended December 31, 2018 and until October 14, 2019 to file its delinquent Quarterly Reports on Form 10-Q for the periods ended March 31, 2019 and June 30, 2019. On September 3, 2019, the Company submitted to Nasdaq an update to its plan to regain compliance with Nasdaq’s filing requirements for continued listing for the Nasdaq staff to review and consider. On May 9, 2019, the Company received a letter from Nasdaq notifying it that it was not in compliance with the requirement of Nasdaq Listing Rule 5605(c)(2) for continued listing on Nasdaq as a result of our audit committee being comprised of fewer than three independent directors. It is the position of the Audit Committee that it was comprised of three independent directors prior to May 9, 2019, and that any action taken to remove two of the members of the audit committee was invalid. Subsequent to May 9, 2019, one of the Company’s directors resigned from the Board and from the audit committee. On June 14, 2019, Nasdaq notified the Company that as a result of the appointment of Catherine Boggs to its Board of Directors and audit committee, Nasdaq determined that it was in compliance with Nasdaq Listing Rule 5605(c)(2).

Subsequent Events

12 Months Ended

Dec. 31, 2018

18. SUBSEQUENT EVENTS

APEG II was the secured lender under the Company’s credit facility and is involved in litigation with the Company, as described in Item 1. Business—Litigation and Liquidity—APEG II Litigation and Note 11-Commitments, Contingencies and Related Party Transactions. As described above, the costs associated with the ongoing litigation have been a significant use of the Company’s existing cash. While the Company has historically funded all litigation costs out of operating cash flow, continued excessive legal fees associated with litigation could impair the Company’s liquidity profile and ability to fund significant drilling obligations.

In March 2019, the Company paid off the entire outstanding balance under its credit agreement of approximately $0.9 million, and the credit facility matured in July 2019.

In May 2019, the Company exchanged approximately 905 leasehold acres of the Georgetown formation and deeper rights in Dimmit and Zavala counties for working interests in certain wells that were drilled by CML Exploration in the first half of 2019. The effective date of the exchange was March 1, 2019.

On December 19, 2018, the Company received a notification letter from The Nasdaq Stock Market LLC (“Nasdaq”) indicating that for 30 consecutive business days the Company’s common stock did not maintain a minimum closing bid price of $1.00 per share as required by Nasdaq Listing Rule 5550(a)(2). Consistent with the Rule, Nasdaq initially provided the Company with a compliance period of 180 calendar days, or until June 17, 2019, to regain compliance with the Rule. To regain compliance with the Rule, the closing bid price of the Company’s common stock must meet or exceed $1.00 per share for at least ten consecutive business days during this 180 calendar day period. On June 19, 2019, Nasdaq notified the Company that, although the Company has not regained compliance with the minimum $1.00 closing bid price per share requirement, Nasdaq has determined that the Company was eligible for an additional 180 calendar day period, or until December 16, 2019, to regain compliance with the minimum bid price requirement. The second 180-day period relates exclusively to the $1.00 closing bid price deficiency, and the Company may be delisted during the 180-day period for failure to maintain compliance with any other Nasdaq listing requirements for which the Company is currently on notice or which occurs during the 180-day period.

On April 17, 2019, the Company received a letter (the “Notice”) from the Nasdaq notifying the Company that it was not in compliance with the requirement of Nasdaq Listing Rule 5250(c)(1) for continued listing as a result of the Company’s failure to timely file its Annual Report on Form 10-K for the fiscal year ended December 31, 2018. Pursuant to the Notice, the Company was required to submit to Nasdaq a plan to regain compliance with Nasdaq’s requirements for continued listing within 60 calendar days of the date of the Notice (by June 17, 2019). On May 21, 2019, the Company received another notice from Nasdaq notifying the Company that it was not in compliance with the requirement of Nasdaq Listing Rule 5250(c)(1) for continued listing on Nasdaq as a result of the delay in filing its quarterly report on Form 10-Q for the quarterly period ended March 31, 2019, and Nasdaq accelerated the date to submit the Company’s plan to meet Nasdaq’s continued listing requirements by May 23, 2019, which it complied with. Nasdaq granted the Company an exception to the Rule until September 16, 2019 to file this delinquent annual report on Form 10-K for the year ended December 31, 2019 and until October 14, 2019 to file its delinquent quarterly reports on Form 10-Q for the quarterly periods ended March 31, 2019 and June 30, 2019. On August 16, 2019, Nasdaq again notified the Company that it was not in compliance with Nasdaq Listing Rule 5250(c)(1) for continued listing due to the delay in filing the Company’s Quarterly Report on Form 10-Q for the quarterly period ended June 30, 2019. Previously, Nasdaq had granted the Company an exception until September 16, 2019 to file its delinquent Annual Report on Form 10-K for the year ended December 31, 2018 and until October 14, 2019 to file its delinquent Quarterly Reports on Form 10-Q for the periods ended March 31, 2019 and June 30, 2019. On September 3, 2019, the Company submitted to Nasdaq an update to its plan to regain compliance with Nasdaq’s filing requirements for continued listing for the Nasdaq staff to review and consider.

On May 9, 2019, the Company received a letter from Nasdaq notifying it that it was not in compliance with the requirement of Nasdaq Listing Rule 5605(c)(2) for continued listing on Nasdaq as a result of our audit committee being comprised of fewer than three independent directors. It is the position of the Audit Committee that it was comprised of three independent directors prior to May 9, 2019, and that any action taken to remove two of the members of the audit committee was invalid. Subsequent to May 9, 2019, one of the Company’s directors resigned from the Board and from the audit committee. On June 14, 2019, Nasdaq notified the Company that as a result of the appointment of Catherine Boggs to its Board of Directors and audit committee, Nasdaq determined that it was in compliance with Nasdaq Listing Rule 5605(c)(2).