In Q4'25, SERV's total operating expenses reached $28.3M, comprising $15.9M in R&D expenses and $12.5M in SG&A expenses, marking a significant quarterly increase driven primarily by R&D investments. From Q1'23 to Q4'25, operating expenses exhibited strong overall growth, rising from $3.4M to $28.3M, with a notable acceleration starting in Q1'24 when R&D expenses surged to $6.6M amid apparent expansion efforts. R&D showed volatile but upward trends, peaking at $15.9M in Q4'25 after dipping to $5.0M in Q3'24, while SG&A expenses grew steadily from $1.3M to $12.5M, with sharp jumps in Q4'24 ($5.1M) and Q3'25 ($14.0M), indicating scaling operations and potential cost pressures in later periods.