revenue in the first quarter of 2022. Non-GAAP gross margin was 71.0% of revenue, compared to 71.2% of revenue in the first quarter of 2022.
Operating expenses in the first quarter of 2023 decreased $3.5 million, or 7%, to $45.3 million, compared to $48.8 million in the first quarter of 2022.
Operating loss was $3.8 million in the first quarter of 2023, compared to $14.9 million in the first quarter of 2022. Non-GAAP operating loss in the first quarter of 2023 was $2.2 million, compared to $5.4 million in the first quarter of 2022.
Other expense was $1.0 million in the first quarter of 2023, compared to $0.5 million in the first quarter of 2022.
Income tax benefit was $2.9 million in the first quarter of 2023, compared to income tax expense of $0.2 million in the first quarter of 2022.
Net loss in the first quarter of 2023 was $1.9 million, or $0.09 per diluted share, compared of $15.6 million, or $0.78 per diluted share, in the first quarter of 2022. Non-GAAP net loss in the first quarter of 2023 was $0.7 million, compared to $8.4 million in the first quarter of 2022.
Weighted average shares used to compute diluted net loss per share were 21.3 million and 19.9 million for the first quarters of 2023 and 2022, respectively.
Adjusted EBITDA was $0.5 million in the first quarter of 2023, compared to ($2.6) million in the first quarter of 2022.
Balance Sheet Summary
As of March 31, 2023, the Company had $55.0 million in cash and cash equivalents and $48.3 million of outstanding borrowings under its credit agreement, compared to $21.9 million in cash and cash equivalents and $49.0 million of outstanding borrowings under its credit agreement as of December 31, 2022.
On February 27, 2023, the Company closed an underwritten public offering, which consisted of 2,875,000 shares of common stock at a public offering price of $13.00 per share. The Company raised $34.6 million of net proceeds after deducting underwriting discounts, commissions, and offering expenses.
2023 Financial Outlook
The Company now expects full year 2023 total revenue in the range of approximately $271.0 million to $275.0 million, representing growth of approximately 10% to 11.5% year-over-year. The Company’s prior 2023 revenue guidance expectations called for total revenue in the range of $269.0 million to $273.0 million, representing growth of approximately 9% to 11% year-over-year.
Conference Call
Management will host a conference call at 5:00 p.m. Eastern Time on May 8th, 2023, to discuss the results of the quarter with a question-and-answer session. Those who would like to participate may