Amount, after accumulated amortization, of debt issuance costs classified as noncurrent. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28555-108399

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.17)
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Name:	us-gaap_DeferredFinanceCostsNoncurrentNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Summary of Significant Accounting Policies (Details Textual) - USD ($)		12 Months Ended
	Aug. 23, 2018	Dec. 31, 2020	Dec. 31, 2019	May 31, 2020
Summary of Significant Accounting Policy [Line Items]
Impairment of proved oil and natural gas properties		$ 0	$ 0
Impairment of unproved properties		0	0
Debt issuance costs capitalized				$ 100,000
Federal income tax expense	$ 0	0
Other Assets [Member]
Summary of Significant Accounting Policy [Line Items]
Debt issuance costs capitalized		$ 1,800,000	$ 2,400,000