The increase year-over-year in non-GAAP operating expenses was a result of market-driven deferred comp expense, variable and labor comp, engineering projects, and travel increases, partially offset by lower non-recurring and legal expenses.

Feb 3, 2022 / CFO / receipt, needs a key / Mike Fogliano, CFO | earnings call 2022-02-03 | transcript 7fd6e7a8-7607-4ee7-8efd-91907278b6d9 | chars 13071-13311 | segment 12