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Note 6 - Stock-based Compensation | 9 Months Ended
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Sep. 30, 2022
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, |
|  | 2022 |  |  | 2021 |  |  | 2022 |  |  | 2021 |
Stock options |  | $ | 176 |  |  | $ | 131 |  |  | $ | 538 |  |  | $ | 468 |
Restricted stock grants |  |  | 3 |  |  |  | 11 |  |  |  | 14 |  |  |  | 44 |
Total |  | $ | 179 |  |  | $ | 142 |  |  | $ | 552 |  |  | $ | 512 |
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, 2022, there was $393 of total unrecognized compensation cost related to outstanding stock options, which is expected to be recognized over a weighted average period of 1.0 years. The following table summarizes stock option activity for the nine-month period ended September 30, 2022:
|  | Number of Shares |  |  | Weighted Average Exercise Price |  |  | Weighted Average Remaining Contractual Term (years) |  |  | Aggregate Intrinsic Value |
Outstanding at January 1, 2022 |  |  | 1,306,824 |  |  | $ | 6.87 |  |  |  |  |  |  |  |  |
Granted |  |  | 11,500 |  |  |  | 4.49 |  |  |  |  |  |  |  |  |
Exercised |  |  | (59,500 | ) |  |  | 3.82 |  |  |  |  |  |  |  |  |
Forfeited or expired |  |  | (56,748 | ) |  |  | 6.63 |  |  |  |  |  |  |  |  |
Outstanding at September 30, 2022 |  |  | 1,202,076 |  |  | $ | 7.01 |  |  |  | 3.81 |  |  | $ | 70 |
Vested and expected to vest at September 30, 2022 |  |  | 1,119,892 |  |  | $ | 7.04 |  |  |  | 3.67 |  |  | $ | 70 |
Exercisable at September 30, 2022 |  |  | 803,774 |  |  | $ | 7.22 |  |  |  | 2.82 |  |  | $ | 67 |
Cash received from stock option exercises under our stock-based compensation plans for the three-month periods ended September 30, 2022 and September 30, 2021 was $3 and $84, respectively. Cash received from stock option exercises under our stock-based compensation plans for the nine-month periods ended September 30, 2022 and September 30, 2021 was $116 and $398, respectively. Outstanding restricted shares vest in equal annual installments over three (3) years. There were 5,000 unvested restricted shares outstanding as of September 30, 2022. Unrecognized compensation cost related to these restricted shares was $4 at September 30, 2022, which is expected to be recognized over a weighted average period of 1.1 years.

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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -URI https://asc.fasb.org/topic&trid=2208762 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -URI https://asc.fasb.org/topic&trid=2228938 + Details
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