Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Revenue:
Commodity derivative gain (loss)	$ 8,680	$ (6,022)	$ (627)	$ (6,647)
Other income	305	6	697	19
Total revenue	36,841	6,148	62,155	12,621
Expenses:
Lease operating expenses	7,480	3,970	14,095	6,058
Pipeline operating expenses	2,950		6,035
Transportation and gathering costs	1,130	1,498	2,799	2,353
Production and property taxes	1,666	615	3,676	1,048
Marketing gas purchases	4,795		11,097
General and administrative	3,947	2,542	8,636	5,491
General and administrative - related party reimbursement		(1,096)		(2,213)
Depreciation, depletion and amortization	3,881	1,979	7,860	3,471
Accretion of asset retirement obligations	405	162	799	303
Total expenses	26,254	9,670	54,997	16,511
Operating income (loss)	10,587	(3,522)	7,158	(3,890)
Other income (expense):
Interest expense, net	(3,445)	(1,201)	(6,725)	(2,203)
Warrant derivative gain				225
Gain on derecognized equity investment in affiliate - Carbon California				5,390
Investment in affiliates	21	525	40	962
Total other (expense) income	(3,424)	(676)	(6,685)	4,374
Income (loss) before income taxes	7,163	(4,198)	473	484
Provision for income taxes
Net income (loss) before non-controlling interests and preferred shares	7,163	(4,198)	473	484
Net income (loss) attributable to non-controlling interests	934	(3,619)	(1,656)	(2,505)
Net income (loss) attributable to controlling interests before preferred shares	6,229	(579)	2,129	2,989
Net income attributable to preferred shares - preferred return	75		150
Net income (loss) attributable to common shares	$ 6,154	$ (579)	$ 1,979	$ 2,989
Net income (loss) per common share:
Basic (in dollars per share)	$ 0.79	$ (0.08)	$ 0.26	$ 0.41
Diluted (in dollars per share)	$ 0.75	$ (0.23)	$ 0.24	$ 0.20
Weighted average common shares outstanding:
Basic (in shares)	7,815	7,693	7,739	7,346
Diluted (in shares)	8,157	7,693	8,081	7,662
Natural gas sales [Member]
Revenue:
Total revenue	$ 14,216	$ 3,523	$ 33,532	$ 7,462
Natural gas liquids [Member]
Revenue:
Total revenue	195	550	441	713
Oil sales [Member]
Revenue:
Total revenue	9,902	8,091	18,891	11,074
Transportation and handling [Member]
Revenue:
Total revenue	322		1,056
Marketing gas sales [Member]
Revenue:
Total revenue	$ 3,221		$ 8,165