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ASSET RETIREMENT OBLIGATIONS (Tables)
 12 Months Ended
Dec. 31, 2019
Asset Retirement Obligation Disclosure [Abstract]  
Schedule of asset retirement obligations
The following table summarizes the changes in the Company’s ARO for the years ended December 31, 2019 and 2018: 
 
For the Year Ended December 31,
 
2019
 
2018
 
(In thousands)
ARO, beginning of period
$
2,444

 
$
952

Additional liabilities incurred
186

 
374

Accretion expense
433

 
85

Liabilities settled
(78
)
 
(87
)
Revision in estimates
438

 
1,120

ARO, end of period
3,423

 
2,444

Less: current portion of ARO (1)
—

 
(11
)
ARO, non-current
$
3,423

 
$
2,433


(1) The current portion of ARO is included in accrued liabilities in the consolidated balance sheets.