For the first quarter of 2011, total revenue was $5.5 million. As we previously announced, this revenue was below our guidance and represents a sequential decline of approximately 20%.
New product revenue totaled $1.2 million, which represented a 46% sequential decrease. New product revenue was negatively impacted by reduced demand from our broadband data card customers and a non-QuickLogic technical issue that’s halted shipments to our secure banking customer. Andy will address both of these situations in detail in his prepared comments.
Mature product revenue in the quarter totaled $4.3 million, which was an 8% sequential decrease and was due to slightly lower bookings during the quarter.
Our non-GAAP gross profit margin for Q1 was 66% and was above our guidance due to the mix of products shipped. Non-GAAP operating expenses for Q1 total 4 million, which was at the low end of our guidance. Non-GAAP operating expenses declined slightly compared to Q4 primarily due to the timing of expenses related to our new product developments efforts.
On a non-GAAP basis, other income and expenses and taxes for Q1 totaled approximately $76,000, primarily due to income tax expenses related to our overseas operations. This resulted in a non-GAAP loss of 435,000 or $0.01 per share.
Our cash usage for the quarter was 858,000. However, due to the exercise of options, our cash position increased by 542, 000 to close the quarter at 22.5 million.
While accounts receivable decreased during the quarter due to the reduced revenue level, DSOs increased primarily due to the timing of certain collections. During the first week of April, we collected approximately $400,000, which had previously been expected to be collected in Q1.
Inventory has increased substantially over the last two quarters primarily due to an increased in PolarPro II inventory. This increase was driven by lower shipment volumes than expected, and the need to support the very short lead time service providers are giving to our broadband data card customers. We currently expect to use this inventory as we go forward and are monitoring it carefully.