XML 21 R12.htm IDEA: XBRL DOCUMENT
v3.19.1

Asset Retirement Obligation | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2019 | Dec. 31, 2018
ASSET RETIREMENT OBLIGATION |  |
Asset Retirement Obligation | 9. ASSET RETIREMENT OBLIGATIONS The following table summarizes the changes in the reserve for future restoration and reclamation costs on the balance sheet:
|  | March 31, |  | December 31,
(thousands of dollars) |  | 2019 |  | 2018
Balance, beginning of period |  | $ | 6,203 |  | $ | 5,731
Liabilities settled |  |  | (335) |  |  | (521)
Accretion expense |  |  | 126 |  |  | 993
Balance, end of period |  |  | 5,994 |  |  | 6,203
Less: Current portion |  |  | (894) |  |  | (708)
Non-current portion |  | $ | 5,100 |  | $ | 5,495
The Company is currently performing plugging and surface reclamation activities at its Rosita and Vasquez projects located in Duval County, Texas. The Company’s current liability of $0.9 million consists of the estimated costs associated with current reclamation activities through March 2020 at the Company’s Rosita and Vasquez projects. | 6. ASSET RETIREMENT OBLIGATION The Company’s mining and exploration activities are subject to various state and federal law and regulations governing the protection of the environment. The Company conducts its operations to protect public health and the environment and believes its operations are in compliance with the applicable laws and regulations in all material respects. The Company has made, and expects to make in the future, expenditures to comply with such laws and regulations, but cannot predict the full amount of such future expenditures. Estimated future restoration and reclamation costs are based principally on legal and regulatory requirements. Changes to the Company’s asset retirement obligation are summarized below:
|  | December 31, |  |  | December 31, |
|  | 2018 |  |  | 2017 |
|  | (thousands of dollars) |
Balance, beginning of period |  | $ | 5,731 |  |  | $ | 4,789 |
Liabilities settled |  |  | (521 | ) |  |  | (97 | )
Accretion expense |  |  | 993 |  |  |  | 1,039 |
Balance, end of period |  |  | 6,203 |  |  |  | 5,731 |
Less: Included in liabilities held for sale |  |  | - |  |  |  | - |
Less: Current portion |  |  | (708 | ) |  |  | (1,078 | )
Non-current portion |  | $ | 5,495 |  |  | $ | 4,653 |
As of December 31, 2018, the Company’s asset retirement obligation was fully secured by surety bonds totaling $9.4 million, which were partially collateralized with restricted cash totaling $3.7 million.

X
- References No definition available. + Details
Name: | us-gaap_AssetRetirementObligationDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The entire disclosure for an asset retirement obligation and the associated long-lived asset. An asset retirement obligation is a legal obligation associated with the disposal or retirement from service of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -URI http://asc.fasb.org/subtopic&trid=2175671 + Details
Name: | us-gaap_AssetRetirementObligationDisclosureTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration