Net loss for the nine months ended September 30, 2023, was $4,239 thousand as compared to $4,440 thousand for the same period in 2022, or an approximate 4.5% decrease. The $201 thousand decrease in net loss is primarily attributable to the $136 thousand increase in gross profit referenced in the above explanation.
Liquidity and Capital Resources
At September 30, 2023, our cash and cash equivalent balance totaled $7,235 thousand compared to $6,451 thousand at December 31, 2022, an increase of $784 thousand. The increase in cash and cash equivalent balance is primarily attributable to the change of short-term held-to-maturity investments. At September 30, 2023, our short-term held-to-maturity investments totaled zero, compared to $2,606 thousand at December 31, 2022.
At September 30, 2023, our current assets were in excess of current liabilities resulting in working capital of $4,947 thousand as compared to $8,586 thousand at December 31, 2022. We have no contractual debt obligations, and the Company has sufficient cash and expected cash collections to fund current operating expenses for over twelve months. To the extent the Company requires additional funds more than 12 months from the date hereof, and customer cash collections cannot fund our needs, the Company may utilize equity offerings. Historically, the Company has funded operations predominantly through equity offerings.
Currently, the Company can sell shares of common stock through its ATM program. As of September 30, 2023, the remaining aggregate offering price for future sales of common stock on the ATM is approximately $8.7 million, subject to the SEC’s “baby shelf rules,” which prohibits companies with a public float of less than $75 million from issuing securities under a shelf registration statement in excess of one-third of such company’s public float in a 12-month period (for more details, see “Note 6 – Equity” in the notes to our condensed consolidated financial statements). Future sales of shares of common stock and the price at which we may be able to sell such shares of common stock under the ATM are dependent on factors beyond our control, including, but not limited to, market conditions, and the trading price of our common stock.
We filed a Form S-3 shelf registration statement with the SEC on July 1, 2022 that was declared effective on August 12, 2022.The registration statement on Form S-3 allows us to offer common stock, preferred stock, warrants, subscription rights, debt securities and units from time to time, as market conditions permit to fund, to the extent required beyond the 12 months from the date hereof, the ongoing operations of the Company. Until the growth of revenue increases to a level that covers operating expenses, the Company intends to continue to fund operations in this manner, although the volatility in the capital markets may negatively affect our ability to do so.
Operating activities for the nine months ended September 30, 2023, resulted in cash outflows of $1,783 thousand, primarily due to the loss for the period of $4,239 thousand, offset with non-cash expenses of $678 thousand, and an increase of $1,554 thousand of contract liabilities, which represents payments from customers in advance of future project costs.
Operating activities for the nine months ended September 30, 2022, resulted in cash outflows of $4,264 thousand, primarily due to the loss for the period of $4,440 thousand, offset with non-cash expenses of $520 thousand.
Investing activities for the nine months ended September 30, 2023, resulted in cash inflows of $2,595 thousand, which is primarily attributable to the redemption $4,847 thousand of short-term held-to-maturity U.S. treasuries, offset by $2,162 thousand of purchases for the same type of investments.
Investing activities for the nine months ended September 30, 2022, resulted in cash outflows of $3,982 thousand, which is primarily attributable to $3,900 thousand of investments in short-term held-to-maturity U.S. treasuries, and $114 thousand of disbursements for patents and other intangibles.
Financing activities for the nine months ended September 30, 2023, included $15 thousand in disbursements for taxes paid related to vesting of employee restricted stock units.