Kevin Green
Analyst · Stephens
Thank you, Lainie. The total revenue for the quarter was $8.8 million, up 33% from Q1 of last year. Product revenue represented $8.7 million, an increase of 41% year-over-year. Kit demand increased approximately 8%, compared to the fourth quarter of 2011 and represented approximately 95% of first quarter 2012 product revenue.
Our first quarter results provide a strong start to meeting our 2012 guidance of $34 million to $36 million in product revenue. Average euro-dollar exchange rates for the first quarter were down almost 3% from the prior quarter, which is in-line with our expectation that 2012 may be impacted by a weaker euro against the dollar compared to 2011.
As a reminder, we currently have an effective natural hedge to foreign exchange exposure. We sell most of our product in euro while also procuring the majority of our inventory in euro, and of course, maintaining our European sales force. Gross margins on product sales during the quarter were 37%, compared to 43% during the same period in 2011. This quarter, we incurred high scrap charges, which were associated with the work-in-process issue first identified in Q4 of last year. We believe we have captured the final charges associated with this incident. We're implementing a number of changes to our supply chain process to reduce the likelihood of encountering such high discard rate for our components going forward.
As a result of these corrective actions, we expect our gross margins to improve, with increased production levels in alignment with expected revenue growth. In addition, we have several COGS-reduction initiatives currently underway with our contract manufacturers and expect to see the benefit of these as early as next year.
Turning now to our operating expenses. Total operating expenses for Q1 2012 were $7.8 million compared to $7.4 million during the same period in 2011. This year-over-year increase is a result of increased selling, general and administrative expenses associated with increased back-office support costs. Going forward, we expect operating expenses to modestly increase, driven primarily by increased research and development expenses as planned clinical trials commence to support CE Mark approval of the INTERCEPT red blood cell system.
In addition, research and development expenses will be affected by the initiation of our planned Phase I and in vitro studies, which will support the planned Phase III clinical trial in the United States for the red blood cell system. In summary, operating expenses were reasonably consistent when comparing the first quarter of 2012 with that of 2011.
By contrast, net losses were $8.8 million or $0.17 per share in Q1 of 2012, up from $5.1 million or $0.11 per share during the same period last year. It's important to note that the change in net loss was driven by a first quarter 2012 noncash charge of $4.5 million, compared to just $1.3 million for the same period in 2011. These noncash charges relate to the mark-to-market adjustments of Cerus' outstanding warrants. In periods with share price escalation, such as we saw during Q1 of 2012, the implied fair value of the outstanding warrants increases, leading to noncash charges.
Turning to cash. We ended the quarter with cash and marketable securities of $31.5 million, compared to $25.8 million at the end of 2011. This increase was due in part to common stocks sold under the ATM for net proceeds of $9.2 million. Cash used for operations was $3.9 million, including investing $2.5 million in additional inventory.
Now I'd like to turn the call over to Larry.