Note 9 - Stock-based Compensation

3 Months Ended

Mar. 31, 2025

Notes to Financial Statements

Share-Based Payment Arrangement [Text Block]

9. Stock-Based Compensation

Under the Company's 2021 Incentive Plan (the "Plan"), and the prior 2011 Incentive Plan, as amended, stock-based compensation may be issued to employees and non-employee directors. As of March 31, 2025, 938,914 shares remained available for future issuance under the Plan.

The following table summarizes stock-based compensation expense, which includes expenses related to awards granted under the Plan for the periods indicated:

	Three Months Ended March 31,
	2025		2024
Restricted stock awards	$	9	$	9
Total	$	9	$	9

Restricted Stock Awards

The following table summarizes restricted stock awards activity for the period indicated:

	Number of Shares		Weighted Average Grant Date Fair Value		Aggregate Grant Date Fair Value
Balance as of December 31, 2024		20,118	$	5.22	$	105
Granted		16,156		6.50		105
Vested		—		—		—
Canceled		—		—		—
Balance as of March 31, 2025		36,274	$	5.79	$	210

As of March 31, 2025, there was $163 of total unrecognized compensation cost related to unvested shares granted. The cost is expected to be recognized over a weighted average period of 2.2 years.