Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2018

Fair Value Measurements [Abstract]

Summary of financial assets and liabilities at fair value

(in thousands)	Fair Value Measurements Using
	Level 1		Level 2		Level 3		Total
June 30, 2018
Liabilities
Commodity derivatives	$	-	$	8,017	$	-	$	8,017
December 31, 2017
Asset:
Commodity derivatives	$	-	$	215	$	-	$	215
Liabilities
Warrant derivative liability	$	-	$	-	$	2,017	$	2,017

Summary of changes in fair value of financial instruments

(in thousands)	Total
Balance, December 31, 2017	$	2,017
Warrant derivative gain for the period January 1- January 31, 2018		(225	)
CCC Warrant Exercise - liability extinguishment		(1,792	)
Balance, June 30, 2018	$	-