Operating Activities
Net cash used in operating activities for the six months ended June 30, 2021 and 2020 was primarily the result of ongoing costs associated with our uproleselan clinical development programs which includes costs for project support, investigator site start-up and administrative costs and patient enrollment fees. These cash expenses were offset by non-cash expenses for stock-based compensation, lease expense and depreciation, and for the six months ended June 30, 2020, the upfront and clinical development milestone payment of $9.0 million received from Apollomics.
Investing Activities
Net cash used in investing activities for the six months ended June 30, 2021 and 2020 was for computer, office and laboratory equipment.
Financing Activities
Net cash provided by financing activities during the six months ended June 30, 2021 primarily consisted of the net proceeds received from our at-the-market facility with Cowen of $9.6 million. Net cash provided by financing activities of $9.7 million during the six months ended June 30, 2020 consisted of the net proceeds received from our prior at-the-market facility with Cowen of $9.6 million and $136,000 in proceeds from stock option exercises.
Off-Balance Sheet Arrangements
During the three months ended June 30, 2021, we did not have, and we do not currently have, any off-balance sheet arrangements, as defined under SEC rules.
ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK
The market risk inherent in our financial instruments and in our financial position represents the potential loss arising from adverse changes in interest rates. As of June 30, 2021 and December 31, 2020, we had cash and cash equivalents of $118.9 million and $137.0 million, respectively. We generally hold our cash in interest-bearing money market accounts. Our primary exposure to market risk is interest rate sensitivity, which is affected by changes in the general level of U.S. interest rates. Due to the short-term maturities of our cash equivalents and the low risk profile of our investments, an immediate 100 basis point change in interest rates would not have a material effect on the fair market value of our cash equivalents.
ITEM 4. CONTROLS AND PROCEDURES
(a) Evaluation of Disclosure Controls and Procedures
The term “disclosure controls and procedures,” as defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended, or the Exchange Act, refers to controls and procedures that are designed to ensure that information required to be disclosed by a company in the reports that it files or submits under the Exchange Act is recorded, processed, summarized and reported, within the time periods specified in the Securities and Exchange Commission’s rules and forms. Disclosure controls and procedures include, without limitation, controls and procedures designed to ensure that such information is accumulated and communicated to a company’s management, including its principal executive and principal financial officers, as appropriate to allow timely decisions regarding required disclosure.
In designing and evaluating our disclosure controls and procedures, management recognizes that disclosure controls and procedures, no matter how well conceived and operated, can provide only reasonable, not absolute, assurance that the objectives of the disclosure controls and procedures are met. Additionally, in designing disclosure controls and procedures, our management necessarily was required to apply its judgment in evaluating the cost-benefit relationship of possible disclosure controls and procedures. The design of any system of controls also is based in part upon certain assumptions about the likelihood of future events, and there can be no assurance that any design will succeed in achieving its stated goals under all potential future conditions; over time, controls may become inadequate