Integra Lifesci has a market cap of $841.6 million; its shares were traded at around $31.17 with a P/E ratio of 11 and P/S ratio of 1.1. Integra Lifesci had an annual average earning growth of 21.2% over the past 10 years.
Highlight of Business Operations:For the year ended December 31, 2011, total revenues increased by $48.0 million or 7%, to $780.1 million from $732.1 million during the prior-year. Domestic revenues increased by 6% to $593.0 million and were 76% of total revenues for the year ended December 31, 2011. International revenues increased $16.2 million to $187.0 million, an increase of 9% compared to 2010. Foreign exchange fluctuations, arising primarily from a stronger euro during the second and third quarters of 2011 and a stronger Australian dollar throughout the year compared to the U.S. dollar than in 2010, accounted for a net $7.9 million increase in revenues for the year ended December 31, 2011. On a constant currency basis, our overall revenues increased 5.5% compared to 2010.
In 2010, total revenues increased by $49.6 million or 7%, to $732.1 million from $682.5 million during 2009. Foreign exchange fluctuations, arising primarily from a weaker euro and a stronger Australian dollar compared to the U.S. dollar than in 2009, accounted for a net unfavorable effect of $0.7 million on 2010 revenues. Orthopedics revenues were $290.1 million in 2010, an increase of 11% over 2009. Our extremities reconstruction products led the dollar growth in this category, followed by our private-label products. Most of the increase in extremities products came from sales of regenerative medicine products for skin and wound repair and from metal implants for the forefoot, mid- and hindfoot. Sales of metal spinal implants were up only slightly compared to 2009 as we were facing new competition, particularly from physician-owned distributorships. Neurosurgery revenues were $275.0 million in 2010, an increase of 7% over 2009. Sales of ultrasonic tissue ablation products led the growth in neurosurgery, followed by stereotaxy and cranial stabilization systems, since capital spending at hospitals improved over 2009 we recognized pent-up demand. Sales of implants, including duraplasty products and shunts, grew more slowly than the capital equipment products. Instruments revenues were $167.0 million for 2010, an increase of 2% over 2009. This growth principally came from increases in hospital-based instrument sales and surgical lighting systems, while sales to physician, dental, and veterinary offices lagged.
Gross margin as a percentage of revenues was 61.7% in 2011, 63.4% in 2010, and 64.1% in 2009. Cost of product revenues in 2011, 2010, and 2009 included $3.3 million, $1.8 million, and $4.6 million, respectively, in fair value inventory purchase accounting adjustments recorded in connection with acquisitions, and $8.2 million, $5.9 million, and $6.6 million, respectively, of amortization for technology-based intangible assets inclusive of impairments.
SELLING, GENERAL AND ADMINISTRATIVE. Selling, general and administrative expenses in the year ended December 31, 2011 increased by $53.0 million to $358.1 million compared to $305.1 million in the same period last year. Selling expenses increased by $20.5 million primarily because of an increase in revenues and the corresponding commission costs, as well as the impact of our SeaSpine and Ascension acquisitions. General and administrative costs increased $32.6 million because of charges related to the implementation of our global enterprise resource planning system of $17.1 million, incremental stock-based compensation charges of $13.3 million related to the renewal of our former Chief Executive Officers employment agreement in May 2011, the accelerated vesting of awards upon the appointment of a new chief executive officer in December 2011 and the minimum annual equity award for 2011 for our former Chief Executive Officer, acquisition related costs of $1.7 million, severance costs, and to a lesser extent, increases in compensation costs brought on by increased headcount.
We generated positive operating cash flows of $104.3 million, $105.6 million and $143.2 million in 2011, 2010 and 2009, respectively. Net income for the year ended December 31, 2011, plus items included in those earnings that did not result in a change to our cash balance, amounted to $119.4 million. In 2011, the impact of net working capital items on operating cash flows excluding the impact of acquisitions was a decrease of $12.3 million. Increases in accounts receivable used $1.9 million of cash, increases in prepaid expenses and other current assets used $0.4 million of cash, which includes a tax refund of $10.0 million, and decreases in accounts payable, accrued expenses, and other current liabilities used $11.8 million of cash. Decreases in inventory provided $1.7 million of cash. Net income for the year ended December 31, 2010, plus items included in those earnings that did not result in a change to our cash balance, amounted to approximately $131.2 million. Additionally, we paid $6.6 million in accreted interest related to the repurchase of our 2010 Notes at their maturity. In 2010, the net impact of working capital items on operating cash flows was a decrease of $11.3 million. Increases in both accounts receivable and inventory resulted in a use of cash; however, those increases resulted from higher overall sales, and accounts receivable was lower as a percentage of sales compared to 2009. Additionally, increases in our prepaid expenses and other current assets used $6.5 million of cash. Increases in accounts payable and accrued expenses primarily offset these uses of cash. The change in other liabilities resulted in part from $4.5 million in reversals of income tax reserves for audits that were concluded during the year. In 2009, changes in working capital items increased operating cash flows by $30.5 million. In 2009, prepaid expenses and other current assets includes a tax refund that provided $11.3 million, improvements in our accounts receivable provided $9.8 million, and reductions in inventory provided another $9.4 million of operating cash flows.
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