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Note 6 - Stock-based Compensation | 9 Months Ended
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Sep. 30, 2025
Notes to Financial Statements |
Shareholders' Equity and Share-Based Payments [Text Block] |
| 6. | STOCK-BASED COMPENSATION
We recorded non-cash stock compensation expense in each period as follows:
|  | Three-month period ended |  |  | Nine-month period ended |
|  | September 30, |  |  | September 30, |  |  | September 30, |  |  | September 30, |
|  | 2025 |  |  | 2024 |  |  | 2025 |  |  | 2024 |
Stock options |  | $ | 192 |  |  | $ | 164 |  |  | $ | 570 |  |  | $ | 472 |
Restricted stock |  |  | 44 |  |  |  | 6 |  |  |  | 128 |  |  |  | 18 |
Total |  | $ | 236 |  |  | $ | 170 |  |  | $ | 698 |  |  | $ | 490 |
We have stock options outstanding from various stock-based employee compensation plans for which we record compensation cost relating to share-based payment transactions in our financial statements. As of September 30, 2025, there was $542 of total unrecognized compensation cost related to outstanding stock options, which is expected to be recognized over a weighted average period of 0.9 years. The following table summarizes stock option activity for the nine-month period ended September 30, 2025:
|  | Number of Shares |  |  | Weighted Average Exercise Price |  |  | Weighted Average Remaining Contractual Term (years) |  |  | Aggregate Intrinsic Value |
Outstanding at January 1, 2025 |  |  | 1,106,436 |  |  | $ | 7.15 |  |  |  |  |  |  |  |  |
Granted |  |  | - |  |  |  | - |  |  |  |  |  |  |  |  |
Exercised |  |  | (15,982 | ) |  | $ | 6.10 |  |  |  |  |  |  |  |  |
Forfeited or expired |  |  | (103,357 | ) |  | $ | 9.17 |  |  |  |  |  |  |  |  |
Outstanding at September 30, 2025 |  |  | 987,097 |  |  | $ | 6.96 |  |  |  | 4.06 |  |  | $ | 343 |
Vested and expected to vest at September 30, 2025 |  |  | 891,035 |  |  | $ | 6.95 |  |  |  | 3.91 |  |  | $ | 315 |
Exercisable at September 30, 2025 |  |  | 535,372 |  |  | $ | 6.78 |  |  |  | 2.81 |  |  | $ | 242 |
Cash received from stock option exercises under our stock-based compensation plans for the three-month periods ended September 30, 2025 and 2024 was $37 and $24, respectively. Cash received from stock option exercises under our stock-based compensation plans for the nine-month periods ended September 30, 2025 and 2024 was $98 and $1,960, respectively. Restricted stock awards vest in equal annual installments over three (3) years. Unrecognized compensation cost related to unvested restricted shares at September 30, 2025 and 2024, respectively, was $126 and $19.

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- Definition The entire disclosure for shareholders' equity and share-based payment arrangement. Includes, but is not limited to, disclosure of policy and terms of share-based payment arrangement, deferred compensation arrangement, and employee stock purchase plan (ESPP). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 718 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/718/tableOfContent Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 505 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/505/tableOfContent + Details
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