Commodity Risk Management Activities - Commodity Price Risks (Details) - USD ($)	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Commodity Risk Management Activities
Unrealized gains (losses) on derivatives included in earnings	$ 4,246,057	$ (1,938,465)
Cash received from (paid for) settlements of derivative contracts	$ 1,949,232	$ (1,381,898)

The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of open derivatives, commodity, or energy contracts, held at each balance sheet date, that was included in earnings for the period.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585

Name:	us-gaap_UnrealizedGainLossOnDerivativesAndCommodityContracts
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration