Kevin Karas
Analyst · William Blair
Thank you, Mike. Revenue for the fourth quarter was $19.1 million, which is an increase of 20% over the fourth quarter of 2010. Our revenue growth for the quarter is comprised entirely from organic growth, which was driven by a combination of continued gains in market share and vertical growth in our existing client base. On a year-to-date basis, revenue grew by 20% as well in 2011 over 2010. After adjusting for the impact of our 2010 OCS acquisition, our 2011 full year organic revenue growth was 12%. We anticipate that our organic revenue growth rate for 2012 will be in the 15% to 20% range for the full year. We ended the year with total contract value of $83.4 million, with subscription-based agreements now representing 73% of contract value. Subscription agreements also generated 73% of our total revenue for the fourth quarter and 63% of our total revenue on a year-to-date basis compared with 32% of total revenue for the full year in 2010.
Our net new sales for 2011 increased by 22% over the prior year. In addition, we experienced a positive trend relative to improved client retention, with retention rates improving by 18% in the second half of 2011 compared to the second half of 2010. The retention improvement is a result of enhancements we have made in our service model, which increased our direct expenses in the fourth quarter and will continue to increase our direct expense as a percent of revenue in the short term as we increased staffing to support major new clients added in late 2011.
Direct expenses for the fourth quarter were 38% of revenue compared to 39% of revenue in the fourth quarter of 2010. On a year-to-date basis, in 2011, direct expenses also decreased to 38% of revenue compared to 39% in 2010. Our selling, general and administrative expenses for the fourth quarter were $5.6 million compared to $5.9 million in the fourth quarter of 2010. This decrease in SG&A expenses is related to approximately $550,000 of 2010 fourth quarter expenses that did not recur in 2011. These were expenses that consisted primarily of OCS acquisition costs and the consolidation of our MIB sales and operations activities into our Lincoln location.
SG&A expenses as a percent of revenue decreased to 30% in the fourth quarter of 2011 compared to 37% in the fourth quarter of 2010, reflecting both the higher 2010 expense levels and leverage of fourth quarter revenue growth from new sales. For the full year 2011, our SG&A expenses were 31% of revenue, an improvement of 1% compared to 2010. We expect to continue to leverage our revenue growth in 2012 against our SG&A expenses and to continue reduce SG&A expenses as a percent of revenue. Our total operating expenses were $14.1 million for the fourth quarter compared to $13.5 million for the fourth quarter of 2010, increasing our margin to 26% of revenue for the fourth quarter. On a year-to-date basis, we improved our operating margin to 25% of revenue.
Our depreciation and amortization expense for the quarter remained level with the fourth quarter of 2010 at $1.3 million. On a year-to-date basis, our depreciation and amortization increased to $5.1 million in 2011 compared to $4.7 million in 2010 with expense both years running at 7% of revenue. We believe that the depreciation, amortization expense going into 2012 should continue at a comparable rate on a percentage-of-revenue basis.
Fourth quarter income tax expense increased from $590,000 with an effective rate of 27% in 2010 to $1.7 million at an effective rate of 35% in 2011. This increase in the effective tax rate is due to higher federal and state tax rates in 2011 as well as a $156,000 reduction in income tax expense in the fourth quarter of last year for additional U.S. research and development credits and other adjustments.
Net income for the quarter compared to last year nearly doubled to $3.1 million, and our diluted earnings per share for the fourth quarter also doubled to $0.46 compared to $0.23 for the same period last year. Our net income for the full year of 2011 of $11.6 million represents a 36% increase over 2010, and our net income margin increased from 13% in 2010 to 15% in 2011.
Finally, our cash flows from operations for the fourth quarter were $4.1 million in 2011 compared to $2.2 million in the same quarter last year. And for the full year, our cash flows from operations grew to $18.5 million, up from $14.6 million in 2010.
With that, I'll turn it back to you, Mike.