Thanks, Steve. Yesterday we filed our 2021 Form 10-Q with the SEC and reporter first quarter financial results and a press release. At a high level our financial results for the first quarter are in line with our internal expectations. Let me highlight a few of those results now. As we reported, we ended the quarter with cash and investments of $143.3 million and no funded debt, which we believe would enable to us to advance or R&D programs and support our strategic initiatives of acquiring earlier stage opportunities and innovative technologies to enable growth and value creation. Net revenues for the first quarter of 2021 was $30.2 million, compared to $29.1 million with Q1 2020. As expected our first quarter sales continue to be impacted by COVID-19 pandemic. In addition, in the first quarter of the calendar year like many companies in our industry. We are impacted by the reset of the patient deductibles, including the [indiscernible] effect. Despite these challenges, our revenues were almost 4% higher in the first quarter of 2021 as compared to the first quarter of 2020. As Steven just mentioned, we are optimistic about our revenue growth in 2021 as the impact of the COVID-19 pandemic subsides. We reported GAAP net income of $7.7 million with Q1 2021 or $0.07 per basic and diluted share compared to GAAP net income of $10.4 million or $0.10 for basic and diluted share for Q1 2020. Before I continue, let me take a moment to provide more color on our first quarter tax. Our effective tax rate in the first quarter of 2021 was 22.5% as compared to 5.4% in the first quarter of 2020. At the same time, we benefited in Q2 2020 from the use of our differed tax assets, which is a noncash item. While we expect to use the balance of our federal net operating losses in 2021, we expect that we will continue to benefit in future periods from the use or deferred tax assets relating to paid net operating losses and the [indiscernible] credit, although those are subject to certain limitations, resulting in a more normalized tax rate once we burn out our net operating losses. In the first quarter of 2021, we recorded a $2 million charge relating to commitments to make charitable donations to 501 foundations that support LEMS patient programs. While such continuations were required to be expensed in the first quarter of 2021, when we committed to the contributions, they will support LEMS patient programs for the 2021 fiscal year. Non-GAAP net income for Q1 2021 was $11.6 million or $0.11 per basic and diluted share, which excludes from GAAP net income, stock-based compensation expense of $1.6 million. Depreciation of $0.1 million and the provision for income taxes of $2.2 million. This compares to the non-GAAP net income for Q1 2020 were $0.6 million or $0.12 per basic and diluted share, which excludes from GAAP net income of base compensation of $1.5 million, depreciation of $14,000 and the provision for income taxes of $0.6 million. Because of the significant effect of the use of our deferred tax assets in the first quarter of 2021 compared to the first quarter of 2020, we believe that this non-GAAP measure is useful for an overall understanding of our resource of operations for the first quarter of 2021 compared to the first quarter of 2020. Cost of sales of $4.7 million for Q1 2021, were slightly up compared to $4.2 million for Q1 2020 at 15% and 14% of revenues respectively. As a reminder, our cost of products continue to benefit from inventory expenses from inventory expense prior to FDA approval of Firdapse, these to a lesser degree than in prior quarters. Research and development expenses were $3 million for Q1 2021, down from $4.2 million for Q1 2020, a 29% decrease in research and development expenses year-over-year is primarily due to increases in clinical trial expenses as we completed our MuSK-MG clinical trial and SMA proof-of-concept study during 2020. We expect that research and development expenses will continue to be substantial in 2021 and beyond as we conduct approval concept study for HNPP, continuing our expanded access programs expects to continue the development of a long-acting formulation program for Firdapse, continue our regulatory path to seek up oil products for the treatment of the lands in Japan and evaluate startup with a treatment for other neuromuscular diseases. Innovation, we expect R&D will also increase in future periods, if we successfully execute on our strategic initiatives to acquire or in-license innovative technology and our earlier-stage opportunities in other therapeutic categories outside of numerous early diseases. SG&A expenses for Q1 2021 totaled $12.7 million compared to $10.1 million in Q1 2020, a 26% increase year-over-year, largely attributable to the timing of the reporting was charged for our commitment to make charitable contributions to 501(c) foundation, supporting LEMS patient programs that I discussed earlier, as well as increases in costs for legal expenses associated with our ongoing litigation and the cost of additional personnel to support our expanding operations. We expect that SG&A expenses will continue to be substantial in 2021 as we conduct our efforts to increase revenues from Firdapse sales and take steps to further expand our business. More detailed information and analysis may be found in the company's quarterly report on Form 10-Q, which was filed with the Securities and Exchange Commission yesterday in May 10, and can be found on the Investor Relations page of our website at www.catalystpharma.com. And with that, I'll turn the call over to Pat.