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Note 6 - Stock-Based Compensation Expense
 3 Months Ended
Mar. 31, 2025
Notes to Financial Statements  
Share-Based Payment Arrangement [Text Block]

6.

Stock-Based Compensation Expense

 

Stock-based compensation expense related to stock options is recognized on a straight-line basis over the requisite service period for the award and is allocated to research and development expense or general and administrative expense based upon the classification of the individual to whom the award is granted. Stock-based compensation expense related to stock option grants was $292,744 and $103,569 during the three-month periods ended March 31, 2025 and 2024, respectively. As of March 31, 2025, there is approximately $2.2 million of unrecognized compensation expense that we expect to recognize over a weighted-average period of 2.4 years.

 

We occasionally issue shares of our restricted common stock for consulting and other services and recognize the expense over the terms of the related agreements. During the three-month periods ended March 31, 2025 and 2024 we recorded stock-based compensation expense of $-0- and $54,167, respectively, associated with common stock issued for consulting services.