Adnan Raza
Analyst · D.A. Davidson
Thank you, John. Good afternoon, everyone. Good to speak with you again today, and I hope all of you and your families are well.
We are pleased to review the financial results for the first quarter of 2024. As mentioned, our earnings release and the management report are posted in the Investor Relations section of our website. Our Form 10-Q was also filed with the SEC today.
Please note that all of the financial results we discuss in today's call are on a non-GAAP basis, and a reconciliation to GAAP financials is provided in the materials on our website.
We are excited about the booking momentum during the quarter, especially the meaningful, multiyear, leading-edge booking with a new customer. Our backlog ending the first quarter was $262 million or approximately $32 million higher compared to our prior quarter ending backlog of $230 million.
Total revenues for the first quarter were $41.3 million, up slightly versus the prior year and up slightly on a sequential basis as well. Analytics revenue came in at $38.5 million, an increase of 6% year-over-year. On a year-over-year basis for the quarter, our IYR business was down driven by lower fixed fee and gain share. However, the growth in analytics allowed us to be slightly up for total revenue versus prior year period.
Like John said, for our Exensio products, we continue to engage with customers on opportunities we are seeing for the digital transformation initiatives and deploying the Exensio platform across their manufacturing operations.
For our leading-edge solutions, we are emboldened by the booking with a new customer, which encompasses our broader offerings, including CV infrastructure, DFI and Exensio software. We're starting to see opportunities for further expansion over the coming years with continued investment in the DFI system.
For our symmetrics products, we saw growth in run-time licenses versus the prior quarter and remain cautiously optimistic. Taken as a whole, we believe our portfolio of product offerings provides us the opportunities for strategic engagement with customers for our analytics solutions.
IYR revenue came in at $2.8 million for the quarter and was down compared to $4.4 million of prior year period, primarily driven by lower time spent on fixed-fee projects and lower gain share. We remain optimistic about the IYR business in the longer term as eventual customer product shipment volumes increase.
Our gross margin for the first quarter came in at 72% versus 75% for Q1 last year and flat versus 72% of Q4. On a year-over-year basis, our cost of sales was driven by the lease accounting treatment for the DFI hardware, increased personnel costs and increases in cloud costs. Our operating margin for the first quarter came in at 12% versus 19% for the year-ago same period and 15% for the prior sequential quarter.
On a year-over-year basis, we were able to better manage and reduce our R&D expenses, while our SG&A expenses increased as we utilize our technical resources and added sales and marketing headcount to support the presales and sales activities with our customers. Net income for the quarter totaled $5.7 million or $0.15 per share, both essentially similar to Q4, however, lower on a year-over-year basis.
Turning to the balance sheet. We ended the quarter with cash, cash equivalents and short-term investments of $122 million compared to $136 million at the end of the prior quarter, with the change primarily driven by $7 million of share buybacks completed during the first quarter, annual bonus payout for calendar year 2023 and CapEx expenses to support the build-out of our DFI systems that John talked about. We have also adopted a new, larger $40 million share buyback program.
Overall, we are pleased with the new leading-edge booking during the quarter, growth in our backlog and are excited by the opportunities we are seeing in our pipeline. As we look to the rest of the year, we remain committed to our prior guidance of flat revenues for the first half of this year, with revenue growth returning to our 20% long-term target for the second half of the year both compared to the respective prior year periods.
With that, let me turn the call over to the operator for Q&A.