Operating loss for the fourth quarter of 2019 was $1.8 million, compared to an operating loss of $4.5 million for the fourth quarter of 2018, a decrease of $2.7 million, or 61%. Total other expenses, net, for the fourth quarter of 2019 were $2.6 million, compared to $4.8 million for the fourth quarter of 2018, a decrease of $2.2 million, or 45%. The decrease was driven primarily by $2.1 millionnon-cash loss on the extinguishment of debt related to the write off of unamortized debt issuance costs upon repayment of affiliate debt in December 2018.
Net loss for the fourth quarter of 2019 was $4.4 million, or $0.04 per share, compared to a net loss of $9.3 million, or $0.12 per share, for the fourth quarter of 2018, a decrease of $4.9 million, or 52%.
As of December 31, 2019, the Company had $60.2 million in cash and $100.6 million in debt obligations, of which $17.5 million were capital lease obligations, compared to $21.3 million in cash and $59.3 million in debt obligations, of which $17.7 million were capital lease obligations, as of December 31, 2018.
Fiscal Year 2019 Results:
Net revenue for the twelve months ended December 31, 2019 was $261.0 million, compared to $193.4 million for the twelve months ended December 31, 2018, an increase of $67.5 million, or 35%. The increase in net revenue was driven by a $56.4 million increase, or 34%, in net revenue of Advanced Wound Care products and a $11.1 million increase, or 38%, in net revenue of Surgical & Sports Medicine products compared to the prior year. Net revenue from the sale of PuraPly products for the twelve months ended December 31, 2019 was $126.8 million, compared to $69.8 million for the twelve months ended December 31, 2018, an increase of $57.0 million, or 82%. Net revenue from the sale of PuraPly products represented approximately 49% of net revenue for the twelve months ended December 31, 2019, compared to 36% for the twelve months ended December 31, 2018.
Gross profit for the twelve months ended December 31, 2019 was $185.0 million or 71% of net revenue, compared to $124.6 million, or 64% of net revenue, for the twelve months ended December 31, 2018, an increase of $60.4 million, or 48%. The largest contributors to the increase in gross margin from the prior period were increased sales volume due to the strength in our Advanced Wound Care and Surgical & Sports Medicine products, PuraPly regaining pass-through reimbursement status for the2-year period effective October 1, 2018, and the resulting higher margins realized as a result of manufacturing efficiencies associated with our Advanced Wound Care products.
Operating expenses for the twelve months ended December 31, 2019 were $214.5 million, compared to $176.2 million for the twelve months ended December 31, 2018, an increase of $38.3 million, or 22%. The increase in operating expenses in 2019 as compared to 2018 was driven primarily by higher selling, general and administrative expenses which increased to $199.7 million, compared to $162.0 million in 2018, an increase of $37.7 million, or 23%. The increase in selling, general and administrative expenses is primarily due to additional headcount, predominantly in our direct sales force; higher legal, consulting fees and other costs associated with the ongoing operations of our business; expenses related to the warrant exchange offer transaction; and additional amortization associated with the acquisition of intangible assets. Operating expenses for the twelve months ended December 31, 2019 were also impacted by higher R&D expenses which were $14.8 million, compared to $10.7 million for the twelve months ended December 31, 2018, an increase of $4.1 million, or 38% due to an increase in clinical research costs and increased headcount associated with our Advanced World Care and Surgical & Sports Medicine products and an increase in product costs associated with the development of our pipeline products.
Operating loss for the twelve months ended December 31, 2019 was $29.5 million, compared to an operating loss of $51.6 million for the twelve months ended December 31, 2018, a decrease of $22.1 million, or 43%. Total other expenses for the twelve months ended December 31, 2019 were $10.8 million, compared to $13.2 million for the twelve months ended December 31, 2018, a decrease of $2.3 million, or 18%. The decrease in total other expenses