EMERYVILLE, Calif.—NovaBay Pharmaceuticals (NYSE MKT: NBY), makers of Avenova Lid and Lash Cleanser, posted a 41 percent increase in sales to a record $1.6 million for the three months ended Dec. 31, 2015, up $1.1 million from $491,000 for the fourth quarter of 2014. The increase was due to growing sales of Avenova, which was commercially launched in August 2014, partially offset by a decrease in collaboration revenue, the company said in a statement.

Product revenue for the fourth quarter of 2015 reached $1.6 million, up from $385,000 for the fourth quarter of 2014. Other revenue for the fourth quarter of 2015 was $48,000, compared with $106,000 for the prior-year period. Gross profit as a percentage of total net sales was 64 percent for the fourth quarter of 2015, up from 40 percent for the prior-year period.

“We are reporting another strong quarter with Avenova sales up sharply from the preceding quarter and substantial gains in all key areas that support a successful launch. We closed out a highly productive year with significant Avenova sales growth in each successive quarter and $4 million in sales for the product’s first full year of commercialization,” said Mark M. Sieczkarek, NovaBay’s chairman and interim president and CEO.

NovaBay’s total net sales for 2015 increased to $4.4 million from $1.1 million for 2014. Product revenue for 2015 reached $4.1 million, compared with $684,000 for 2014. Other revenue for 2015 was $235,000, compared with $370,000 for the prior year. Gross profit as a percentage of total net sales increased to 71 percent from 54 percent for 2014.