Approximately 80% of the Company's ROU assets and lease liabilities relate to office facilities leases, with the remaining amounts representing primarily ground station leases. The leases have various expiration dates through 2031. Certain of the Company’s lease agreements include escalating lease payments. Additionally, certain lease agreements contain renewal provisions and other provisions which require the Company to pay taxes, insurance, or maintenance costs. These payments are generally variable and are expensed as incurred on the consolidated statements of operations.

Lease expenses were $4,172 and $3,409, for the years ended December 31, 2023 and 2022, respectively. Aggregate variable lease expenses and short-term lease expenses were $613 and $548, for the years ended December 31, 2023 and 2022, respectively.

Operating cash flows paid were $2,782 and $1,632 included in the measurement of operating lease liabilities for the years ended December 31, 2023 and 2022, respectively, and were included in net cash used in operating activities in the consolidated statements of cash flows. Amortization of ROU assets was $2,928 and $2,344 for the years ended December 31, 2023 and 2022, respectively.