Acquisitions (Details 1) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Oil and gas properties:
Commodity derivative liability - current	$ 469
Commodity derivative liability - non-current	87
Asset retirement obligations - non-current	$ (17,514)	(19,211)
Carbon California [Member]
Business Acquisition [Line Items]
Cash		275
Accounts receivable:
Prepaid expenses, deposits, and other current assets		1,723
Joint interest billings and other		690
Receivable - related party		1,610
Oil and gas properties:
Proved		65,114
Unproved		1,495
Other property and equipment, net		877
Other non-current assets		475
Accounts payable and accrued liabilities		(6,054)
Commodity derivative liability - current		(916)
Commodity derivative liability - non-current		(1,729)
Asset retirement obligations - current		(384)
Asset retirement obligations - non-current		(2,537)
Subordinated Notes, related party, net		(8,874)
Senior Revolving Notes, related party		(11,000)
Notes payable		(92)
Total net assets acquired		40,673
OIE Membership Acquisition [Member]
Business Acquisition [Line Items]
Cash		12,283
Accounts receivable:
Revenue		12,834
Trade receivable		1,941
Commodity derivative asset		198
Inventory		2,022
Prepaid expenses, deposits, and other current assets		456
Oil and gas properties:
Proved		107,694
Unproved		1,869
Other property and equipment, net		15,441
Other non-current assets		514
Accounts payable and accrued liabilities		(20,468)
Due to related parties		(236)
Firm transportation contract obligations		(18,724)
Asset retirement obligations - current		(5,626)
Notes payable		(37,975)
Total net assets acquired		$ 72,223

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