16. Supplemental Information for Statement of Cash Flows

Cash, cash equivalents, and restricted cash and cash equivalents per the Statement of Cash Flows consists of the following:

Interest expense paid was nil and $0.1 million for the three and nine months ended September 30, 2024, respectively, and $0.1 million and $0.4 million for the three and nine months ended September 30, 2023, respectively.

Accounts payable included $1.4 million of insurance and surety bond expenses and $0.6 million in equipment purchases at September 30, 2024. Accounts payable included $0.2 million in equipment purchases at December 31, 2023. As these did not affect cash balances at the respective dates, they have been adjusted on the Statement of Cash Flow.