Laboratory supplies expenses include laboratory materials and supplies, services, and other related expenses incurred in the development of our technology. The $0.1 million decrease in laboratory supply expenses for the three months ended March 31, 2022, as compared to the three months ended March 31, 2021, was primarily due to lower laboratory materials and supplies purchases. We expect laboratory supplies expenses to remain relatively consistent over the next twelve months, although there may be fluctuations on a quarterly basis.
Facility expenses include depreciation, amortization, utilities, rent, maintenance and other related expenses incurred at our facilities. Facility expenses for the three months ended March 31, 2022 was relatively consistent with the three months ended March 31, 2021. We expect facility expenses to remain relatively consistent over the next twelve months, although there may be fluctuations on a quarterly basis.
Product development expenses include clinical investigator site fees, external trial monitoring costs, data accumulation costs, contracted research and outside clinical drug product manufacturing. The $2.4 million increase in product development expenses for the three months ended March 31, 2022, as compared to the three months ended March 31, 2021, was primarily due to an increase in clinical trial expenses. We expect product development expenses to increase over the next twelve months as a result of further increases in barzolvolimab clinical trial, contract manufacturing and contract research expenses.
General and Administrative Expense
The $2.8 million increase in general and administrative expenses for the three months ended March 31, 2022, as compared to the three months ended March 31, 2021, was primarily due to higher personnel, legal and commercial planning expenses. We expect general and administrative expenses to increase over the next twelve months primarily due to increased commercial planning efforts for barzolvolimab.
(Gain) Loss on Fair Value Remeasurement of Contingent Consideration
The $0.5 million gain on fair value remeasurement of contingent consideration for the three months ended March 31, 2022 was primarily due to changes in discount rates. The $0.5 million loss on fair value remeasurement of contingent consideration for the three months ended March 31, 2021 was primarily due to changes in discount rates and the passage of time.
Investment and Other Income, Net
The $0.1 million increase in investment and other income, net for the three months ended March 31, 2022, as compared to the three months ended March 31, 2021, was primarily due to higher levels of cash and investment balances. We expect investment and other income to increase over the next twelve months due to higher interest rates on fixed income investments and higher other income related to our sale of New Jersey tax benefits.
LIQUIDITY AND CAPITAL RESOURCES
Our cash equivalents are highly liquid investments with a maturity of three months or less at the date of purchase and consist primarily of investments in money market mutual funds with commercial banks and financial institutions. We maintain cash balances with financial institutions in excess of insured limits. We do not anticipate any losses with respect to such cash balances. We invest our excess cash balances in marketable securities, including municipal bond securities, U.S. government agency securities and high-grade corporate bonds that meet high credit quality standards, as specified in our investment policy. Our investment policy seeks to manage these assets to achieve our goals of preserving principal and maintaining adequate liquidity.
The use of our cash flows for operations has primarily consisted of salaries and wages for our employees; facility and facility-related costs for our offices, laboratories and manufacturing facility; fees paid in connection with preclinical studies, clinical studies, contract manufacturing, laboratory supplies and services; and consulting, legal and other professional fees. We anticipate that our cash flows from operations will continue to be focused in these areas as we progress our current drug candidates through the clinical trial process and develop additional drug candidates. To date, the primary sources of cash flows from operations have been payments received from our collaborative partners and from government entities and payments received for contract manufacturing and research and development services provided by us. The timing of any new contract manufacturing and research and development agreements, collaboration agreements, government contracts or grants and any payments under these agreements, contracts or grants cannot be easily predicted and may vary significantly from quarter to quarter.