General and Administrative
General and administrative expenses for the three months ended June 30, 2023 were $1,470,000, an increase of $388,000, compared to the general and administrative expenses for the three months ended June 30, 2022 of $1,082,000. The increase in general and administrative expenses is primarily related to increased investor relations expenses and consulting fees of $334,000 and $52,000, respectively.
General and administrative expenses for the six months ended June 30, 2023 were $2,832,000 an increase of $624,000, compared to the general and administrative expenses for the six months ended June 30, 2022 of $2,208,000. The increase in general and administrative expenses is primarily related to increased legal expenses, investor relations expenses and consulting fees of $168,000, $292,000 and $85,000, respectively.
Interest Expense, net
Interest expense, net for the three and six months ended June 30, 2023 was $37,000 and $760,000, respectively. Interest expense, net for the three and six months ended June 30, 2022, was not significant.
The increase in interest expense, net for the three and six months ended June 30, 2023, was primarily due to the amortization of debt discounts associated with the senior secured convertible note that the Company issued in August 2022 and repaid in full on April 11, 2023.
Change in Fair Value of Warrant Liabilities
Change in fair value of warrant liabilities for the three months ended June 30, 2023 was $246,000, compared to $0 for the three months ended June 30, 2022. The change in fair value of the warrant liabilities for the three months ended June 30, 2023 was primarily due to the decrease in the price of our common stock at June 30, 2023 compared to the price of our common stock on the date of the warrant issuance as well as the decline in our common stock price from March 31, 2023, related to existing warrant liabilities.
Change in fair value of warrant liabilities for the six months ended June 30, 2023 was $5,850,000, compared to $0 for the six months ended June 30, 2022. The change in fair value of the warrant liabilities for the six months ended June 30, 2023 was due to the issuance of warrants in February 2023 and the subsequent decrease in the price of our common stock at June 30, 2023 compared to the price of our common stock on the date of the warrant issuance as well as the decline in our common stock price from December 31, 2022, related to existing warrant liabilities.
Loss on Debt Extinguishment
During the three and six months ended June 30, 2023, the Company recorded a loss on debt extinguishment of $837,000. The loss is directly related to the Company’s April 2023 repayment of the Convertible Note in the amount of $1,656,744. The repayment of the entirety of the outstanding balance of such note, included the unpaid principal, interest through the payoff date, and a pre-payment premium of $276,000. The loss also includes the expensing of the related unamortized debt discounts totaling $894,000, offset partially by a $333,000 gain on termination of a derivative liability that was established in connection with the Convertible Note.
Liquidity and Capital Resources
Cash and cash equivalents as of June 30, 2023 were $2,007,000, compared to $2,897,000 as of December 31, 2022.
We incurred a net loss of $6,247,000 for the six months ended June 30, 2023 and used net cash in operating activities of $9,126,000. We incurred a net loss of $8,012,000 for the six months ended June 30, 2022 and used net cash in operating activities of $8,307,000. Excluding non-cash adjustments, the primary reasons for the decrease in the use of net cash from operating activities during the six months ended June 30, 2023, was related to the decrease in inventories and prepaid expenses, partially offset by a decrease in accounts payable and accrued liabilities.
We have financed our operations to date primarily through the issuance of equity securities, proceeds from the exercise of warrants to purchase common stock and sale of debt instruments. In August 2022, we received net proceeds of $2.5 million from the issuance of a convertible promissory note to an investor. In December 2022, we received net proceeds of $6.4 million, from the issuance of 540,000 shares of common stock (includes the exercise of 36,000 pre-funded warrants) and the issuance of 1,080,000 warrants to purchase common stock. In February 2023, we received net proceeds of approximately $5.3 million from the issuance of 583,306 shares of