The increase in fourth quarter operating expenses from a year ago reflected an increase in headcount, increased variable compensation, and higher travel costs.

Jan 20, 2022 / CFO / receipt, needs a key / Jamie Sameth, CFO | earnings call 2022-01-20 | transcript 50d34899-0c79-4cbc-93a0-f55916a17bbd | chars 21284-21443 | segment 21