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Note 10 - Common Stock and Stock-based Compensation Plans | 6 Months Ended
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Jun. 30, 2019
Notes to Financial Statements |
Share-based Payment Arrangement [Text Block] | NOTE 10 : COMMON STOCK AND STOCK-BASED COMPENSATION PLANS The Company grants stock options and stock appreciation rights (“SARs”) capped with a ceiling to employees and stock options to non-employee directors of the Company and its subsidiaries and provides the right to purchase common stock pursuant to the Company’s 2002 employee stock purchase plan to employees of the Company and its subsidiaries. The SAR unit confers the holder the right to stock appreciation over a preset price of the Company’s common stock during a specified period of time. When the unit is exercised, the appreciation amount is paid through the issuance of shares of the Company’s common stock. The ceiling limits the maximum income for each SAR unit. SARs are considered an equity instrument as it is a net share settled award capped with a ceiling ( 400% for SAR grants). The options and SARs granted under the Company’s stock incentive plans have been granted at the fair market value of the Company’s common stock on the grant date. Options and SARs granted to employees under stock incentive plans vest at a rate of 25% of the shares underlying the option after one year and the remaining shares vest in equal portions over the following 36 months, such that all shares are vested after four years. Options granted to non-employee directors vest 25% of the shares underlying the option on each anniversary of the option grant. A summary of the Company’s stock option and SAR activities and related information for the six months ended June 30, 2019, are as follows:
|  | Number of options and SAR units (1) |  |  | Weighted average exercise price |  |  | Weighted average remaining contractual term |  |  | Aggregate intrinsic- value |
Outstanding as of December 31, 2018 |  |  | 702,817 |  |  | $ | 19.88 |  |  |  | 4.3 |  |  | $ | 2,708 |
Granted |  |  | — |  |  |  | — |  |  |  |  |  |  |  |  |
Exercised |  |  | (31,274 | ) |  |  | 17.15 |  |  |  |  |  |  |  |  |
Forfeited or expired |  |  | (730 | ) |  |  | 21.83 |  |  |  |  |  |  |  |  |
Outstanding as of June 30, 2019 (2) |  |  | 670,813 |  |  | $ | 20.00 |  |  |  | 3.9 |  |  | $ | 3,677 |
Exercisable as of June 30, 2019 (3) |  |  | 600,098 |  |  | $ | 19.27 |  |  |  | 3.6 |  |  | $ | 3,594 |
| ( 1 ) | The SAR units are convertible for a maximum number of shares of the Company’s common stock equal to 75% of the SAR units subject to the grant.
| ( 2 ) | Due to the ceiling imposed on the SAR grants, the outstanding amount equals a maximum of 618,297 shares of the Company’s common stock issuable upon exercise.
| ( 3 ) | Due to the ceiling imposed on the SAR grants, the exercisable amount equals a maximum of 548,136 shares of the Company’s common stock issuable upon exercise.
As of June 30, 2019, there was $71 of unrecognized compensation expense related to unvested stock options and SARs. This amount is expected to be recognized over a weighted-average period of 1.1 years. Starting in the second quarter of 2015, the Company granted to employees, including executive officers, and non-employee directors, restricted stock units (“RSUs”) under the Company’s 2011 Stock Incentive Plan. A RSU award is an agreement to issue shares of the Company’s common stock at the time the award or a portion thereof vests. RSUs granted to employees generally vest in three equal annual installments starting on the first anniversary of the grant date. Until the end of 2017, RSUs granted to non-employee directors would generally vest in full on the first anniversary of the grant date. Starting in 2018, RSUs granted to non-employee directors would generally vest in two equal annual installments starting on the first anniversary of the grant date. The fair value of each RSU is the market value as determined by the closing price of the common stock on the day of grant. The Company recognizes compensation expenses for the value of its RSU awards, based on the straight-line method over the requisite service period of each of the awards. On May 7, 2019, the Compensation Committee (the “Committee”) of the Board of Directors (the “Board”) of the Company approved, effective immediately, an amendment to the RSU award granted to the Company’s Chief Executive Officer (the “CEO”) on February 19, 2019, consisting of 30,000 RSUs that vest in a three -year period (the “Prior RSU Award”). Based on feedback from stockholders during engagements with them prior to the Company’s 2019 annual meeting of stockholders, the Committee and the CEO mutually agreed to amend the Prior RSU Award. In lieu of the Prior RSU Award, the CEO would receive ( 1 ) 10,000 time-based RSUs with the same original three -year vesting schedule starting with 1/3 on February 19, 2020, and ( 2 ) an opportunity to receive up to 24,000 performance-based PSUs shares (the “PSUs”) based on the Company’s achievement of the 2019 license and related revenue goal approved by the Board (the “2019 License Revenue Target”). If the Company’s results equal 100% of the 2019 License Revenue Target, the CEO would receive 20,000 PSUs. If the Company’s results are between 90% to 99% of the 2019 License Revenue Target, the CEO would receive the same proportion of the 20,000 PSUs. If the Company’s results exceed 100% of the 2019 License Revenue Target, every 1% increase of the 2019 License Revenue Target, up to 120%, would result in an increase of 1% of the 20,000 PSUs to be awarded to the CEO. Subject to the Company achieving 90% of the 2019 License Revenue Target, the PSUs would vest in a three -year period, with 1/3 of the PSUs vest on February 19, 2020, and thereafter 1/3 of the remaining PSUs would vest on each of February 19, 2021 and February 19, 2022. A summary of the Company’s RSU and PSU activities and related information for the six months ended June 30, 2019, are as follows:
|  | Number of RSUs and PSUs |  |  | Weighted Average Grant-Date Fair Value |
Unvested as of December 31, 2018 |  |  | 564,390 |  |  | $ | 32.28 |
Granted |  |  | 375,600 |  |  |  | 28.15 |
Vested |  |  | (239,731 | ) |  |  | 29.53 |
Forfeited or expired |  |  | (25,290 | ) |  |  | 29.63 |
Unvested as of June 30, 2019 |  |  | 674,969 |  |  | $ | 30.95 |
As of June 30, 2019, there was $16,453 of unrecognized compensation expense related to unvested RSUs and PSUs. This amount is expected to be recognized over a weighted-average period of 1.6 years. The following table shows the total equity-based compensation expense included in the interim condensed consolidated statements of loss:
|  | Six months ended June 3 0 , |  |  | Three months ended June 3 0 , |
|  | 201 9 (unaudited) |  |  | 201 8 (unaudited) |  |  | 201 9 (unaudited) |  |  | 201 8 (unaudited) |
Cost of revenue |  | $ | 296 |  |  | $ | 325 |  |  | $ | 160 |  |  | $ | 168 |
Research and development, net |  |  | 2,820 |  |  |  | 2,628 |  |  |  | 1,458 |  |  |  | 1,359 |
Sales and marketing |  |  | 750 |  |  |  | 877 |  |  |  | 394 |  |  |  | 423 |
General and administrative |  |  | 1,229 |  |  |  | 1,786 |  |  |  | 667 |  |  |  | 895 |
Total equity-based compensation expense |  | $ | 5,095 |  |  | $ | 5,616 |  |  | $ | 2,679 |  |  | $ | 2,845 |
The fair value for rights to purchase shares of common stock under the Company’s employee stock purchase plan was estimated on the date of grant using the following assumptions:
|  | Six months ended June 3 0 , |
|  | 201 9 (unaudited) |  |  | 201 8 (unaudited) |
Expected dividend yield |  |  | 0 | % |  |  |  |  | 0 | %
Expected volatility |  |  | 43 | % |  |  | 35% | - | 42 | %
Risk-free interest rate |  |  | 2.5 | % |  |  | 0.7% | - | 1.6 | %
Contractual term of up to (months) |  |  | 24 |  |  |  |  |  | 24 |

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