John Ritchie
Analyst · Wunderlich
Thanks, Robert, and thanks again, everyone, for joining us for on our second quarter conference call. I'll jump quickly to our results.
We saw a strongly continued growth in our second quarter revenues, they came in up 95% or up $42.7 million to $87.8 million, up from $45.1 million in the same period in the prior year. The increase in revenue was primarily driven by 103% increase in our Systems Products revenue, as well as 118% increase in our Antenna/Other category. On a sequential basis, revenues increased 11% or up $8.7 million, from the $79.2 million we recorded in the September quarter. And from an EPS perspective, our EPS numbers went up from 11% -- $0.11 in the year-ago period to $0.27 today, and the current quarter, up 145%. Our GAAP net income was $24.7 million and our non-GAAP net income for the quarter was $24.9 million.
But before I go through the quarter in more detail -- more revenue detail, I want to highlight some key milestones we achieved during the quarter. We again exceeded the high end of our long-term operating margin goal of 32% to 34%, with operating margins coming in at approximately 36% for the quarter. Our operating margin goal still remains at 32% to 34% over the long term.
We just completed our seventh straight quarter of improved gross margins. Our new platforms, UniFi and AirVision, combined contribute $4.2 million in revenue for the quarter. The successful launch of AirVision marks another step with our long-term objective of being recognized as a broad-based telecommunications technology provider.
And moving to the revenue in more detail. I want to give you -- remind you of the categories that we currently report our revenue in. We have 2 line items in our Systems category. AirMax and our Other Systems. Included with thinner Other Systems category are our new products, specifically AirVision and UniFi. The 2 remaining categories, are Embedded Radios and lastly, our Antenna/Other category. As a reminder, the Antenna/Other category primarily consists of non-integrated airMAX antennas and to a lesser extent, spare parts and other accessories, such as cables, mounting brackets, et cetera.
Note that once a new product or new platform reaches a significant revenue level, we'll break that up that separately much as we've done with the airMAX product line.
Now diving a little deeper into each category, starting with our proprietary airMAX platform. Revenues came in at $52.9 million, up 106%, or up $27.3 million from the $25.6 million recognized in the same period last year. On a sequential basis, airMAX revenues increased 6% or $3.1 million from the $49.8 million recognized in the September quarter.
Our Other Systems category, which includes our legacy BGM products, as well as revenue from our UniFi and AirVision platforms. These revenues contributed $22.5 million for the quarter, up 96% and up $11 million from the same period last year. On a sequential basis, Other Systems increased 45%, or were up $7 million from the $15.5 million reported in the September quarter. A large component of both the year-over-year and sequential growth was from the sales of these newer platforms. Moving forward, we expect this category -- we expect modest gains in this category, with UniFi and AirVision growth being offset by slower growth than the BGM product lines.
Revenues for our Embedded products, our original product line, were $2.6 million, down $700,000 sequentially and $900,000 on a year-over-year basis. Moving forward, we expect this category to account for a contracting percentage of our overall revenues.
During the quarter, our Antenna/Other category, revenues came in at $9.8 million, up 118% and up $5.3 million from the $4.5 million revenue recognized in the same period last year. On a sequential basis, revenue in this category was down approximately $800,000. Again, revenue in this category is driven largely by sale of nonintegrated standalone airMAX antennas.
Now moving on to the breakdown of our revenues. North America revenues were $21.4 million, up 54% sequentially and down 14% -- up 54% on a year-over-year basis and down 14% on a sequential basis. The sequential decline which related to a North American distributor, who is transitioning from a single SKU that could be shipped across the globe on a worldwide basis, to SKUs that are only shippable in the U.S. This contributed to higher inventory levels at this particular distributor. As we move forward, we expect to return to our historic geographical revenue split with North America comprising roughly 30% of our total revenues.
South America revenues increased 22% sequentially, and 169% on a year-over-year basis to a total of $24.3 million. This region continues to benefit from government spending on infrastructure build out, focusing on increasing Internet access for the population.
Moving now to EMEA. Revenues here also increased 22% on a sequential basis and 59% on a year-over-year basis for a total of $30.4 million. Revenue for this region is largely concentrated with distributors in Eastern Europe, and to a lesser extent, the Middle East, with minimal exposure to Western Europe and some of the current difficulties in the Western European economies.
And lastly, our smallest region, Asia Pac/rest of the world, those revenues increased 23% sequentially and 280% on a year-over-year basis.
Now move on to our gross margins. Our gross margins were up on a year-over-year basis 250 basis points, growing from 40% to 42.5%. This gross margin improvement was primarily driven by increased supply chain management, and to a lesser extent, the scale we benefit from with increased revenues. Sequentially, gross margins were up 80 basis points from 41.7% in the September quarter. Again, as we mentioned before, this is our seventh consecutive quarter of gross margin improvement, very pleased with those results.
Now moving on to our non-GAAP expenses. They came in at $5.8 million, up from $5.2 million, or up 12% on a sequential basis, and up from $4.1 million, or up 40% on a year-over-year basis, deflecting our focus on increased R&D spend as well as expanding our infrastructure.
As a reminder, our non-GAAP operating expenses exclude the impacts of stock-based compensation expense.
Though our expense levels are relatively low, we continue to aggressively pursue and hire the most talented engineers we can find in any location globally. As such, we continue to expect our R&D expenses to move up on an absolute basis. In addition, we also expect to continue building out our infrastructures, so we expect to see some increase in SG&A as well.
As you saw on the press release, our non-GAAP operating margins are ahead of our long-range model of 32% to 34%. Operating margins came in at a record 36%, compared to 31% in the prior year, and up from 35% sequentially.
The primary driver of this sizable improvement in operating margins was a relatively modest increase in OpEx, coupled with significant revenue growth. As I mentioned last quarter, over the long haul, we expect operating margins in the 32% to 34% range, which leaves us room to grow our R&D expenses in both absolute terms, as well as percentage of revenue terms.
Specific to the third quarter, we're expecting margins -- operating margins to come in at approximately 35%, still ahead of our long-term model.
Now moving onto below the operating income line. We have approximately $300,000 of expense for the quarter. This shift in interest expense is primarily related to our outstanding $35 million loan agreement with EastWest Bank. At today's interest rates, we expect expenses to remain in this $300,000 k [ph] level for the March quarter.
Now the last item on our P&L, the effective tax rate for December quarter was 20%, and as a reminder, the primary driver of our effective tax rate is the geographical mix of products. Assuming a return to this geographical mix of 70/30, 70 being non-North American sales, we expect that 20% effective rate to continue.
Moving on to the balance sheet. In the second quarter, our cash balances grew $12.3 million. As a reminder, the proceeds from our IPO were $30.5 million and we recognized that during the quarter. In addition, in the quarter, we also reduced our expanding debt by $35.5 million. This $35.5 million reduction is related to the payoff over the $34 million balance of our convertible notes, and the reduction in the principle of our EastWest loan of about $1.5 million. We expect to generate -- as we move forward, we expect to continue to generate significant free cash with the majority of the cash generation occurring outside the U.S.
For the quarter, our inventory balance was $9 million, an increase of about $600,000 compared to the prior quarter. The vast majority of our inventory is raw materials in the form of chipsets and we hold very little in the way of finished goods inventory.
Moving on to the accounts receivable levels. Accounts receivable increased $13.3 million to $61.4 million from $48.1 million at the end of the last quarter. The increase was partially driven by an approximately $8.7 million increase in revenues on a sequential basis and shipping linearity in the quarter when compared to the prior quarter. Our DSO decreased to 64 days from 65 days in the same quarter last year. On a sequential basis, they increased from 56 days. DSOs remain within our targeted range of mid-50 to mid-60 day levels.
Looking forward to the third quarter, our outlook, we currently expect revenues in the range of $89 million to $91 million, representing a 74% to 76% year-over-year growth. And we expect non-GAAP EPS coming in at $0.27 to $0.28.
Now with that, we'll turn it over to the operator for questions.