In Q4'25, RGTI's total operating expenses reached $23.3M USD, driven primarily by R&D expenses of $17.3M USD, which marked a significant increase from prior quarters, while SG&A expenses remained relatively stable at $5.9M USD. Over the period from Q1'23 to Q4'25, R&D expenses exhibited a fluctuating yet overall upward trend, declining initially from $13.7M USD to a low of $11.5M USD in Q1'24 before surging to $17.3M USD by Q4'25, reflecting intensified investment in development activities. In contrast, SG&A expenses showed greater stability with minor variations, averaging around $6M USD annually and peaking at $9M USD in Q1'23, indicating controlled administrative cost management amid the company's growth phase. The stacked bar chart highlights R&D as the dominant component, comprising over 70% of total expenses in recent quarters.