Net loss in the fourth quarter of 2022 was $31.5 million, or ($0.66) per diluted share, compared to net loss of $21.9 million, or ($0.47) per diluted share, in the fourth quarter of 2021. Non-GAAP net loss in the fourth quarter of 2022 was $25.1 million, or ($0.53) per diluted share, compared to non-GAAP net loss of $15.3 million, or ($0.33) per diluted share, in the fourth quarter of 2021.
Full Year 2022 Financial Results
Net sales in 2022 of $282.9 million declined 4% on a reported basis, or 2% on a constant currency basis, compared to $294.0 million in 2021.
Gross margin for 2022 was approximately 76%, compared to approximately 77% in 2021. Non-GAAP gross margin for 2022 was approximately 83%, compared to approximately 85% in 2021.
SG&A expenses in 2022 increased 8% to $192.9 million, compared to $179.3 million in 2021. Non-GAAP SG&A expenses in 2022 increased 10% to $189.6 million, compared to $172.2 million in 2021.
R&D expenses in 2022 rose 22% to $123.3 million, compared to $101.0 million in 2021. Non-GAAP R&D expenses in 2022 rose 23% to $123.1 million, compared to $100.4 million in 2021.
Loss from operations in 2022 was $82.3 million, compared to operating loss of $32.9 million in 2021. Non-GAAP loss from operations in 2022 was $86.7 million, compared to non-GAAP operating loss of $32.8 million in 2021.
Net loss in 2022 was $99.2 million, or ($2.09) per diluted share, compared to net loss of $49.6 million, or ($1.07) per diluted share, in 2021. Non-GAAP net loss in 2022 was $103.6 million, or ($2.18) per diluted share, compared to non-GAAP net loss of $49.6 million, or ($1.07) per diluted share, in 2021.
During 2022 and 2021, the company received two separate $30 million payments related to the company’s settlement of patent litigation with Ivantis, Inc. Both of these receipts are recorded as an offset to GAAP operating expenses in 2022 and 2021, respectively.
Included in non-GAAP loss from operations, non-GAAP net loss and non-GAAP EPS for 2022 is an in-process R&D (IPR&D) charge of $10.0 million associated with an upfront payment related to the execution of a licensing arrangement, which caused the non-GAAP loss per diluted share to have an additional loss of ($0.21) in 2022. Included in non-GAAP loss from operations, non-GAAP net loss and non-GAAP EPS for 2021 are IPR&D charges of $10.0 million associated with upfront payments related to various licensing arrangements, along with an R&D charge of $1.0 million associated with a milestone payment related to a licensing arrangement, which in total caused the non-GAAP loss per diluted share to have an additional loss of ($0.24) in 2021. These charges were previously excluded in the prior year reporting period from non-GAAP operating expenses and have been adjusted to account for a change in the company’s methodology to now include similar IPR&D and R&D transactions for non-GAAP disclosure and reporting purposes.
The company ended the fourth quarter of 2022 with approximately $360 million in cash and cash equivalents, short-term investments and restricted cash.
2023 Revenue Guidance
The company expects 2023 net sales to be in the range of $290 million to $295 million based on the latest foreign currency exchange rates.