Operating expenses rose to $10.1 million , compared with $7.0 million in the prior-year quarter and $6.7 million in the preceding quarter. Research and development expenses increased to $7.5 million from $4.0 million a year earlier and $3.8 million in the prior quarter, driven primarily by the purchase of IP related to Plato development and associated consulting expenses. Selling, general, and administrative expenses were $2.6 million , compared with $3.0 million in both the year-ago quarter and the prior q ...