In November 2021, the board of directors adopted the Amended and Restated 2021 Equity Incentive Plan (the “2021 Plan”) which provides for the granting of non-qualified stock options and restricted stock to the Company’s employees, officers, directors, and outside consultants to purchase shares of the Company’s common stock. As of June 30, 2026, the number of shares of common stock available for issuance under the 2021 Plan is 570,596 shares of common stock.

Stock-based compensation expense included the following components:

All stock-based compensation expense is recorded in general and administrative expense in the unaudited condensed consolidated statements of operations.

Stock Options

The fair value of options is estimated on the date of grant using the Black-Scholes option pricing model. The fair value is amortized as compensation cost on a straight-line basis over the requisite service period of the awards, which is generally the vesting period. Expected volatility is estimated based on the Company’s historical stock price volatility, and for periods prior to January 1, 2026 the expected volatility was based on historical volatility from a representative sample of publicly traded companies. The expected term represents the period of time that the options are expected to be outstanding. The risk-free interest rate is estimated using the rate of return on U.S. Treasury Notes with a life that approximates the expected life of the option. Stock-based compensation is based on awards that are ultimately expected to vest.

Option awards are generally granted with an exercise price equal to the fair value of the Company’s stock at the date of grant; those options generally vest based on four years of continuous service and have 10-year contractual terms.

A summary of option activity under the 2021 Plan as of and for the six months ended June 30, 2026 is presented below:

The weighted-average grant date fair value of options granted during the six months ended June 30, 2026 was $1.05. The grant date fair value of the options was determined utilizing the Black-Scholes model with the following assumptions at the date of issuance: Company stock price of $1.65 on date of grant, a 6.0 year expected life, volatility of 67.4%, a risk-free rate of 3.73% and an expected dividend yield of 0%. The weighted-average remaining contractual term for the options outstanding and exercisable is approximately 6.0 years and 5.7 years, respectively, as of June 30, 2026. As of June 30, 2026, the Company had $28 in unrecognized compensation related to non-vested options to be recognized over the remaining weighted average vesting period of 2.6 years.

Restricted Stock

Restricted stock consists of grants of shares the Company’s common stock, subject to time-based or performance-based vesting requirements. Shares of restricted stock granted under the 2021 Plan with time-based vesting requirements generally vest based on continued services. Shares of restricted stock with performance-based vesting requirements typically vest immediately as various performance goals and targets are achieved. Grants of restricted stock are recognized as issued and outstanding shares of the Company’s common stock, subject to forfeiture in the event the vesting requirements are not met.

A summary of restricted stock activity under the 2021 Plan as of and for the six months ended June 30, 2026 is presented below:

As of June 30, 2026, the Company had $702 in unrecognized compensation related to non-vested restricted stock to be recognized over the remaining weighted average vesting period of 2.41 years.