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Asset retirement obligations | 3 Months Ended
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Mar. 31, 2022
Asset retirement obligations |
Asset retirement obligations | Note 8 – Asset Retirement Obligations Asset retirement obligations represent the present value of the estimated costs to remove the commercial charging stations and restore the sites to the condition prior to installation. The Company reviews estimates of removal costs on an ongoing basis. Accretion expense was $0.5 million and $0.3 million for the three months ended March 31, 2022 and 2021, respectively. Asset retirement obligation activity for the three months ended March 31, 2022 was as follows: ​
​ | ​ | ​ | ​
​ |  | March 31,
(in thousands) | ​ | ​ | 2022
Beginning balance | ​ | $ | 12,833
Liabilities incurred | ​ |  | 1,001
Accretion expense | ​ |  | 459
Liabilities settled | ​ |  | (219)
Ending balance | ​ | $ | 14,074
​

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- 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
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