Supplemental Cash Flow Disclosure (Tables)

6 Months Ended

Jun. 30, 2017

Supplemental Cash Flow Disclosure [Abstract]

Summary of supplemental cash flow disclosures

	Six Months Ended June 30,
(in thousands)	2017			2016
Cash paid during the period for:
Interest	$	433		$	110
Non-cash transactions:
Increase in net asset retirement obligations	$	5		$	5
Decrease in accounts payable and accrued liabilities included in oil and gas properties	$	(79	)	$	(59	)
Issuance of warrants for investment in affiliates	$	7,094		$	-