Gross profit in Q4 was $29.7 million for a 61.4% gross margin, down from 69.9% a year earlier. Pylypiv said the margin change reflected “product mix, the timing of deliveries across the year, as well as the integration of upgraded system capabilities.” Operating income was $6.0 million, down from $16.1 million in the year-ago quarter, which she attributed to “continued investment in engineering development, product scaling, and public company infrastructure.”Chief Financial Officer Dr. Mariya Pylypiv said f ...