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Note 6 - Stock-based Compensation | 6 Months Ended
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Jun. 30, 2020
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, |
|  | 2020 |  |  | 2019 |  |  | 2020 |  |  | 2019 |
Stock options |  | $ | 278 |  |  | $ | 142 |  |  | $ | 470 |  |  | $ | 316 |
Restricted stock grants |  |  | 26 |  |  |  | 33 |  |  |  | 64 |  |  |  | 44 |
Total |  | $ | 304 |  |  | $ | 175 |  |  | $ | 534 |  |  | $ | 360 |
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, 2020, there was $903 of total unrecognized compensation cost related to outstanding stock options, which is expected to be recognized over a weighted average period of 1.4 years. The following table summarizes stock option activity for the six-month period ended June 30, 2020:
|  | Number of Shares |  |  | Weighted Average Exercise Price |  |  | Weighted Average Remaining Contractual Term (years) |  |  | Aggregate Intrinsic Value |
Outstanding at January 1, 2020 |  |  | 1,541,792 |  |  | $ | 6.88 |  |  |  |  |  |  |  |  |
Granted |  |  | 251,000 |  |  |  | 6.51 |  |  |  |  |  |  |  |  |
Exercised |  |  | (16,631 | ) |  |  | 4.58 |  |  |  |  |  |  |  |  |
Forfeited or expired |  |  | (13,084 | ) |  |  | 7.77 |  |  |  |  |  |  |  |  |
Outstanding at June 30, 2020 |  |  | 1,763,077 |  |  | $ | 6.84 |  |  |  | 3.28 |  |  | $ | 1,734 |
Vested and expected to vest at June 30, 2020 |  |  | 1,651,988 |  |  | $ | 6.78 |  |  |  | 3.08 |  |  | $ | 1,711 |
Exercisable at June 30, 2020 |  |  | 1,194,342 |  |  | $ | 6.45 |  |  |  | 1.87 |  |  | $ | 1,610 |
The following assumptions were used to value stock options granted during the six months ended June 30, 2020:
Risk-Free Interest Rate |  |  | 0.4 | %
Volatility Factor |  |  | 49 | %
Weighted Average Expected Life (Years) |  |  | 5.3 |
Dividends |  |  | 0.0 | %
The weighted average grant date fair value of options granted during the six months ended June 30, 2020 was $2.78. Cash received from stock option exercises under our stock-based compensation plans for the three-month periods ended June 30, 2020 and June 30, 2019 was $47 and $122, respectively. Cash received from stock option exercises under our stock-based compensation plans for the six-month periods ended June 30, 2020 and June 30, 2019 was $76 and $478, 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 $81 at June 30, 2020, which is expected to be recognized over a weighted average period of 1.7 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 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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