Thanks, Brad. Consolidated net sales were $101 million to the first quarter of 2014, decreasing 2% from net sales of $103 million in the first quarter of 2013. This was produced from our 4 strategic business units, or SBUs, that I will now cover.
Let's start with BioStim. Sales increased 0.5% to $38.4 million in the first quarter of 2014 compared to $38.2 million for the same period in the prior year. The increase in BioStim revenue was driven by a stable performance in spine stimulation and a lower yet
improving performance in Physio-Stim as we continue to transition the sales force. The net margin for BioStim in the first quarter of 2014 was $14.2 million or 37% of sales as compared to $16.9 million or 44% of sales in the prior quarter last year. This decrease was primarily due to higher commission expenses related to improved performance by our sales force, as well as the conversion of some reps to distributors as part of our stabilization and growth strategy.
Net sales in our Biologics SBU decreased $400,000 or 2.7% to $13 million in the current quarter from $13.4 million in the same period last year. This decrease was due to a reduction in our marketing service fee rate with the Musculoskeletal Transplant Foundation to 65% from 70% on April 1, 2013, for Trinity Evolution and Trinity Elite sales. When normalized with this change, sales in Biologics grew 4% year-over-year in Q1. The net margin in the first quarter of this year, was $6.7 million or 51% compared to $6.0 million or 45% in the first quarter of 2013.
Net sales in our Extremity Fixation SBU increased $900,000 to $27.1 million or 3.4% in the first quarter of 2014 compared to $26.2 million for the same period last year. The sales increase was driven primarily through our direct sales force in the U.K. and France. The U.S. and Brazil businesses are still in transition, which Brad will comment on in a few minutes. The net margin for Extremity Fixation was $9.3 million or 34% versus $8.0 million or 31% for the comparable quarter last year.
Net sales in our Spine Fixation SBU decreased $2.7 million to $22.8 million in the first quarter of 2014 compared to $25.5 million for the same period last year, a decline of 10.6%. This decrease was primarily due to lower international sales. This reduction was not unexpected and will be with us for most of 2014. Net margins for Spine Fixation in the quarter was $5.1 million or 22% compared to $2.2 million or 8% in the prior year's quarter.
Now I'll discuss a few financial measures on a consolidated company basis. Our gross profit increased $1.6 million to $79.3 million in the first quarter of 2014 compared to $77.8 million for the same period last year. Gross profit as a percent of net sales in the first quarter of 2014 was 78.3% or a 310-basis point improvement over the 75.2% for 2013. This increase was due to inventory valuation changes based on intercompany profit eliminations in geographical sales mix. Sales and marketing expenses decreased $900,000 to $44.2 million in the first quarter of 2014 compared to $45.1 million in the first quarter of 2013. As a percent of net sales, sales and marketing expenses were 43.6% in both the first quarter of 2014 and 2013.
First quarter 2014 net margin increased 6.5% to $34.8 million over $32.7 million in the first quarter of the prior year. As a percent of sales, net margin improved to 34.4% in the first quarter of 2014 from 31.6% in the first quarter of 2013. This increase was primarily driven by Spine Fixation and Extremity Fixation, which was offset primarily by a decrease in BioStim net margin, as a result of an increase in commission expenses. Spine Fixation net margins benefited from cost reductions and lower commissions due to a higher international sales mix.
General and administrative expenses decreased $800,000 or 4.5% in the first quarter of 2014 to $17.5 million compared to $18.3 million in the first quarter of 2013. General and administrative expenses as a percent of net sales was 17.3% in the first quarter of 2014 compared to 17.7% for the same period last year.
Research and development expense increased $200,000 in the first quarter of 2014 to $5.9 million compared to $5.7 million in the first quarter of 2013. As a percent of net sales, research and development expense was 5.9% in the first quarter of 2014 compared to 5.6% for the same period last year.
Operating income during the period decreased to $2.5 million or 2% of net sales compared to $8.1 million or 8% in the same period last year. Included in our first quarter operating expenses were $8.3 million of costs related to the accounting review and restatement. When adjusted to exclude these expenses in 2014, and $3.5 million in succession and restructuring charges in 2013, operating income this period was $10.8 million or 10.6% of net revenue compared to 11.2% in prior year.
Regarding income tax expense, for the quarter, the tax rate was 112% primarily due to $662,000 in discrete charges associated with nondeductible share-based compensation associated with our employee stock purchase plan, as well as losses in foreign jurisdictions for which the company does not receive a tax benefit.
Net income from continuing operations for the quarter was a loss of $200,000 or $0.01 per diluted share compared to a gain of $7.6 million or $0.39 per diluted share in the first quarter of 2013. When eliminating the specified items included in the reconciliation table in today's press release, adjusted net income from continuing operations was $5.2 million or $0.29 per share in the period compared with $7.2 million or $0.37 per share.
Our total cash position as of March 31, 2014, was $46 million down from $54.2 million at year end 2013. Free cash flow for the quarter was a negative $13.9 million, which we calculate as cash flow from operations of a negative $10.2 million plus capital expenditures of $3.7 million. This compares to a positive free cash flow of $9.4 million in the first quarter of 2013. This low cash flow anomaly in the first quarter occurred due to a combination of a number of factors including: The financial restatement and review related expenses, the timing of a significant cash collection, restatement distractions impacting our commercial cash collections and the annual employee incentive compensation payout. However, as a point of reference, our total cash position increased $13.7 million to $59.7 million as of the end of April 2014.
Days sales outstanding, or DSOs, were up marginally at the end of the first quarter to 68 days as compared with 65 days at December 31, 2013. On a year-over-year basis, DSOs were down 18 days from 86 days. Finally, our long-term debt as of March 31, 2014, remains unchanged from December 31, 2013, at $20 million.
With that, I'll turn the call back over to Brad.