Operating Expenses
Research and Development
Research and development expenses increased by $9,413, or 55%, to $26,543 for the year ended December 31, 2021, from $17,130 for the year ended December 31, 2020. This increase was primarily driven by increases in contract development of $2,359, consumption of parts from inventory of $1,120, stock-based compensation expense of $1,473, personnel costs of $3,276, and information technology expense of $619.
Sales and Marketing
Total sales and marketing expenses increased by $7,140, or 210%, to $10,548 for the year ended December 31, 2021, from $3,408 for the year ended December 31, 2020. This increase was primarily due to increases in marketing program spend of $1,830, stock-based compensation expense of $1,132, and personnel costs of $3,284.
General and Administrative
Total general and administrative expenses increased by $18,799, or 280%, to $25,514 for the year ended December 31, 2021, from $6,715 for the year ended December 31, 2020. This increase was primarily due to an increase in administrative expense, including professional accounting and legal fees of $5,062, directors’ and officers’ insurance premium of $1,893, information technology expense of $609, stock-based compensation expense of $5,461, and personnel costs of $6,243.
Change in Fair Value of Embedded Derivative and Warrant Liabilities
Change in fair value of embedded derivative (See Note 3) and warrant liabilities decreased by $1,187, or 84%, to $223 for the year ended December 31, 2021, from $1,410 for the year ended December 31, 2020. This decrease was primarily due to the embedded derivative value decreasing by $1,503 for the year ended December 31, 2020 versus $17 for the year ended December 31, 2021, offset by the acquisition of private placement warrants resulting from the Merger.
Gain on PPP Loan Forgiveness
Gain on PPP loan forgiveness increased by $2,297, or 100%, for the year ended December 31, 2021. In June 2021 the full principal and interest of the PPP loan was forgiven.
Interest Income and Other
Interest income and other increased by $538, or 2,339%, to $561 for the year ended December 31, 2021, from $23 for the year ended December 31, 2020. This increase was primarily due to the interest earned on our marketable securities of $540.
Interest Expense and Other
Interest expense and other increased by $3,355, or 223%, to $4,857 for the year ended December 31, 2021, from $1,502 for the year ended December 31, 2020. This increase was primarily due to $1,583 of costs associated with the Tumim Stone Common Stock Purchase Agreement, and increases related to the SVB financing facility loan of $430, interest on convertible notes of $341, amortization of discounts on marketable securities of $456, and an increase in the amortization of debt discount and debt issuance costs of $550.
Net Loss
Net loss increased by $38,460, or 145%, to $65,011 for the year ended December 31, 2021, from $26,551 for the year ended December 31, 2020. This increase was primarily due to an increase in operating expenses.
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