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Stock-Based Compensation	6 Months Ended
Stock-Based Compensation	Jun. 30, 2025
Stock-Based Compensation [Abstract]
Stock-Based Compensation	Note 5 — Stock-Based Compensation Our stockholders approved the Amended and Restated 2013 Equity Incentive Plan (A&R Plan) at our annual shareholders’ meeting in June 2024, which added 1,000,000 shares to the plan. Our prior plan expired in 2023; the A&R Plan will govern awards granted under the prior plan. The A&R Plan provides for the granting of stock options, restricted stock units (RSUs) and restricted stock. Options granted under the A&R Plan are granted with an exercise price equal to the fair value of the of our stock on the date of grant. RSUs and restricted stock are granted at the fair value of our stock on the date of grant because they have no exercise price. The fair value of options, RSUs and restricted stock are expensed over the vesting periods. All options, RSUs and restricted stock are subject to forfeiture if service terminates prior to the shares vesting. At June 30, 2025, there were 556,341 shares available for grant under the A&R Plan. Stock-based compensation expense included in general and administrative expense was $237 and $264, and in research and development expense was $204 and $196, for the three months ended June 30, 2025 and 2024, respectively. Stock-based compensation expense included in general and administrative expense was $427 and $494, and in research and development expense was $445 and $454, for the six months ended June 30, 2025 and 2024, respectively. During the three and six months ended June 30, 2025, we granted 30,000 shares of restricted stock with a weighted average grant date fair value of $8.90 per share. During the three and six months ended June 30, 2024, we granted 48,000 and 119,000 shares of restricted stock, respectively, with a weighted average grant date fair value of $3.77 and $5.58 per share, respectively. During the six months ended June 30, 2025 and 2024, we paid $7 and $3, respectively for withholding taxes due on awards; these withholding taxes are reflected as financing costs in the accompanying statement of cash flows because the grantees surrendered shares equal to the value of withholding taxes due, and those surrendered shares were cancelled. As of June 30, 2025 and 2024, the unrecognized stock-based compensation expense related to unvested awards (including stock options, RSUs, and restricted stock) was $3,825 and $2,374, respectively, which will be amortized over an estimated weighted average period of approximately 3.21 years and 3.27 years, respectively. During 2025, we returned 11,286 awards to the plan due to cancellation of unexercised options.