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Note 6 - Stock-based Compensation | 6 Months Ended
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Jun. 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 |  |  | Six-month period ended |
|  | June 30, |  |  | June 30, |  |  | June 30, |  |  | June 30, |
|  | 2022 |  |  | 2021 |  |  | 2022 |  |  | 2021 |
Stock options |  | $ | 181 |  |  | $ | 174 |  |  | $ | 362 |  |  | $ | 337 |
Restricted stock grants |  |  | 3 |  |  |  | 12 |  |  |  | 11 |  |  |  | 33 |
Total |  | $ | 184 |  |  | $ | 186 |  |  | $ | 373 |  |  | $ | 370 |
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 June 30, 2022, there was $516 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 six-month period ended June 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 |  |  | 5,000 |  |  |  | 4.68 |  |  |  |  |  |  |  |  |
Exercised |  |  | (58,750 | ) |  |  | 3.81 |  |  |  |  |  |  |  |  |
Forfeited or expired |  |  | (44,834 | ) |  |  | 6.76 |  |  |  |  |  |  |  |  |
Outstanding at June 30, 2022 |  |  | 1,208,240 |  |  | $ | 7.01 |  |  |  | 4.07 |  |  | $ | 33 |
Vested and expected to vest at June 30, 2022 |  |  | 1,103,948 |  |  | $ | 7.01 |  |  |  | 3.93 |  |  | $ | 33 |
Exercisable at June 30, 2022 |  |  | 717,956 |  |  | $ | 7.06 |  |  |  | 2.93 |  |  | $ | 33 |
Cash received from stock option exercises under our stock-based compensation plans for the three-month periods ended June 30, 2022 and June 30, 2021 was $0 and $283, respectively. Outstanding restricted shares vest in equal annual installments over three (3) years. There were 5,000 unvested restricted shares outstanding as of June 30, 2022. Unrecognized compensation cost related to these restricted shares was $6 at June 30, 2022, which is expected to be recognized over a weighted average period of 1.3 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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