15. Stock-based Compensation

On March 8, 2022 the Company issued options to purchase 630,000 shares of the Company's common stock to two named executive officers. The right to exercise the options vest over a five-year period on a straight-line basis. The options have a strike price of $4.53 per share and will expire on March 8, 2032. The estimated grant date fair value of these options is $612,000, which is being expensed ratably over the vesting period. A Black Scholes model was used to determine the fair value of the options at the time the options were issued, using the Company’s historical 5-year market price of its stock to determine volatility (equating to 65.04%), an estimated 5-year term to exercise the options, a 5-year risk-free rate of return of 1.8%, and the market price for the Company’s stock of $2.40 per share.

On June 30, 2020, the Company issued options to purchase 280,000 shares of the Company’s common stock, to certain executive officers and other employees. The right to exercise the options vest over a five-year period on a straight-line basis. The options have a strike price of $3.81 per share and expire on June 30, 2030. The estimated grant date fair value of these options is $290,000, which was fully expensed as of June 30, 2025.

The Company recorded $57,000 and $78,000 of compensation expense for the years ended December 31, 2025 and 2024, respectively, related to the Company's stock options granted. There were 106,000 options outstanding and unvested as of December 31, 2025, which will generate an estimated future expense of $60,000 through the first quarter of 2027.