The nature, amount, timing, and uncertainty of our revenue and how revenue and cash flows are affected by economic factors is most appropriately depicted by revenue type, geographic region, and customer vertical.

Revenue by type for the quarters and six months ended June 30, 2025 and 2024 was as follows (in thousands):

We use the location of the customer as the basis of attributing revenue to geographic regions. Revenue by geographic region for the quarters and six months ended June 30, 2025 and 2024, as a percentage of our total revenue, was as follows:

We generate our revenue primarily from the global communications markets; however, we serve an expanding group of customers in other markets including retail, financial services, healthcare, insurance, and government entities. Revenue by customer vertical for the quarters and six months ended June 30, 2025 and 2024, as a percentage of our total revenue, was as follows:

We have chosen not to record our debt at fair value, with changes recognized in earnings each reporting period. The following table indicates the carrying value and estimated fair value of our debt as of the indicated periods (in thousands):