Thank you, Phillip. Revenues for the 3 months ended March 31, 2021, were $157,000 as compared to $42,000 for the 3 months ended March 31, 2020. With revenues in both quarters attributable to the R&D services provided to Amgen.
The cost of revenues for the 3 months ended March 31, 2021, and March 31, 2020, were $58,000 and $42,000, respectively, and were comprised of salaries and related expense in connection with the R&D services provided to Amgen.
Total operating expenses for the 3 months ended March 31, 2021, were $2.5 million and included $1.2 million in research and development expenses and $1.3 million in general and administrative expenses. Research and development expense for the 3 months ended March 31, 2021, consisted primarily of headcount-related costs and external costs related to the conduct of the EB613 Phase II clinical trial.
General and administrative expense for the 3 months ended March 31, 2021, was primarily made up of salary and related expenses, including share-based compensation, professional fees, D&O insurance expense and legal fees.
Financial expenses net for the 3 months ended March 31, 2021, and 2020 are mainly resulting from the remeasurement of warrants issued in connection with our 2018 initial public offering and our private placement in December 2019, which included a second closing in February 2020. Increase of $7.1 million in the 3 months ended March 31, 2021, is attributed to the increase of the fair value of the warrants, mainly due to an increase in our market share price.
Net comprehensive loss for the 3 months ended March 31, 2021, was $9.5 million or $0.43 per ordinary share diluted. And for the 3 months ended March 31, 2020, the net loss was $2.9 million or $0.16 per ordinary share diluted. The change in net loss is primarily due to the increase in fair value for the bonds due to the increase in the Entera's market share price.
As of March 31, 2021, Entera had cash and cash equivalents of $16.4 million and in our 6-K that we filed today, we will report approximately $15.1 million in cash and cash equivalents as of May 10, 2021.
Based on our current operating plans, we expect our 2021 operating losses to be approximately $13 million. This is subject to expected timing of product development programs, including EB613, and subject to any continuing impact of COVID-19 on our operations.
As a result, we believe our cash position will be sufficient to fund our operations into the second quarter 2022.
I'll now turn the call back to Spiros for concluding remarks before we go to question and answers.