10. LEASES

The Company adopted ASU 2016-02 (Topic 842) effective January 1, 2019 using the modified retrospective adoption method which allowed it to initially apply the new standard at the adoption date and recognize a cumulative-effect adjustment to the opening balance of accumulated deficit. In connection with the adoption of the new lease pronouncement, the Company recorded a charge to accumulated deficit of $847.

A reconciliation of lease obligations for the six months ended June 30, 2021, is as follows:

All extension options that are reasonably certain to be exercised have been included in the measurement of lease obligations. The Company reassesses the likelihood of extension option exercise if there is a significant event or change in circumstances within its control.

The components of lease expense for the three and six months ended June 30, 2021 and 2020 are as follows:

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The key assumptions used in accounting for leases as of June 30, 2021 were a weighted average remaining lease term of 17.6 years and a weighted average discount rate of 6%. The key assumptions used in accounting for leases as of December 31, 2020 were a weighted average remaining lease term of 18.1 years and a weighted average discount rate of 6.0%.

The future lease payments with initial remaining terms in excess of one year as of June 30, 2021 were as follows: