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Note 7 - Stock-based Compensation | 6 Months Ended
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Jun. 30, 2019
Notes to Financial Statements |
Shareholders' Equity and Share-based Payments [Text Block] | 7. 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, |  |  | July 1, |  |  | June 30, |  |  | July 1, |
|  | 2019 |  |  | 2018 |  |  | 2019 |  |  | 2018 |
Stock options |  | $ | 142 |  |  | $ | 186 |  |  | $ | 316 |  |  | $ | 309 |
Restricted stock grants |  |  | 33 |  |  |  | 19 |  |  |  | 44 |  |  |  | 35 |
Total |  | $ | 175 |  |  | $ | 205 |  |  | $ | 360 |  |  | $ | 344 |
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, 2019, there was $284 of total unrecognized compensation cost related to outstanding stock options, which is expected to be recognized over a weighted average period of 1.1 years. The following table summarizes stock option activity for the six -month period ended June 30, 2019:
|  | Number of Shares |  |  | Weighted Average Exercise Price |  |  | Weighted Average Remaining Contractual Term (years) |  |  | Aggregate Intrinsic Value |
Outstanding at January 1, 2019 |  |  | 1,576,087 |  |  | $ | 6.58 |  |  |  |  |  |  |  |  |
Granted |  |  | - |  |  |  | - |  |  |  |  |  |  |  |  |
Exercised |  |  | (104,587 | ) |  |  | 4.56 |  |  |  |  |  |  |  |  |
Forfeited or expired |  |  | (6,916 | ) |  |  | 4.59 |  |  |  |  |  |  |  |  |
Outstanding at June 30, 2019 |  |  | 1,464,584 |  |  | $ | 6.74 |  |  |  | 3.03 |  |  | $ | 2,917 |
Vested and expected to vest at June 30, 2019 |  |  | 1,409,866 |  |  | $ | 6.69 |  |  |  | 2.94 |  |  | $ | 2,860 |
Exercisable at June 30, 2019 |  |  | 1,189,793 |  |  | $ | 6.13 |  |  |  | 2.65 |  |  | $ | 2,704 |
Cash received from stock option exercises under our stock-based compensation plans for the three -month periods ended June 30, 2019 and July 1, 2018 was $122 and $354, respectively. Cash received from stock option exercises under our stock-based compensation plans for the six -month periods ended June 30, 2019 and July 1, 2018 was $478 and $1,293, respectively. In April 2019, 20,000 shares of restricted stock were awarded to certain of our employees at a weighted-average grant date fair value of $11.12 per share. In January 2018, 17,500 shares of restricted stock were awarded to certain of our employees at a weighted-average grant date fair value of $7.16 per share. All outstanding restricted shares vest in equal annual installments over three years. Unrecognized compensation cost related to these restricted shares was $230 at June 30, 2019.

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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 http://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 http://asc.fasb.org/topic&trid=2228938 + Details
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