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INTRUSION Protect everything . Trust nothing . NEWS RELEASE INTRUSION Reports First Quarter 2021 Results 5/4/2021 PLANO , Texas , May 04 , 2021 ( GLOBE NEWSWIRE ) INTRUSION , Inc. ( NASDAQ : INTZ ) , a leading provider of cyberattack prevention solutions including zero - days , announced today financial results for the first quarter ended March 31 , 2021 . " First quarter revenue grew quarter - over - quarter and year - over - year , " said Jack Blount , President and CEO of INTRUSION . " We continue to make excellent progress with the rollout of INTRUSIONShield in terms of new customers and adding channel partners . As is typical for newly launched SaaS products , it will take time for INTRUSIONShield to materially contribute to our quarterly results . We remain very encouraged by the exceptional feedback we've received from existing customers and the increasing interest from potential customers . We're gaining strong momentum in our opportunity pipeline both in the U.S. as well as with our new international resellers . " Blount continued , " A factor in our growth was our government business . We see activity in Washington progressing toward a gradual resumption of more normal ordering patterns as the year unfolds . " First Quarter Financial Results Revenue for the first quarter 2021 was $ 1.9 million , compared to $ 1.6 million for the fourth quarter 2020 and $ 1.8 million for the first quarter 2020 . Gross profit margin expanded to 66 % of revenue in the first quarter 2021 , compared to 58 % for the fourth quarter 2020 and 58 % for the first quarter 2020 . Operating expenses in the first quarter 2021 were $ 5.1 million , compared to $ 4.8 million for the fourth quarter 1