Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation

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Stock-Based Compensation
12 Months Ended
Dec. 31, 2019
Equity [Abstract]  
Stock-Based Compensation Stock-Based Compensation
The Company grants stock-based awards under its 2014 Incentive Stock Plan (the “2014 Plan”) and the 2012 Stock Plan (the “2012 Plan”). The 2014 Plan replaced the 2012 Plan, but the 2012 plan remains in effect for the administration of awards made prior to its replacement by the 2014 Plan. The shares issued as a result of stock-based compensation transactions generally have been funded with the issuance of new shares of the Company’s common stock.

The Company may grant the following types of incentive awards under the 2014 Plan: (i) non-qualified stock options; (ii) incentive stock options; (iii) stock appreciation rights; (iv) restricted stock; and (v) restricted stock units. Each award granted under the 2014 Plan is subject to an award agreement that incorporates, as applicable, the exercise price, the term of the award, the periods of restriction, the number of shares to which the award pertains, and such other terms and conditions as the plan committee determines. Awards granted under the 2014 Plan are classified as equity awards, which are recorded in stockholders’ equity in the Company’s Consolidated Balance Sheets.
Stock Options
The Company’s closing price on the date of grant is the basis of fair value of its common stock used in determining the value of share-based awards. To the extent the value of the Company’s share-based awards involves a measure of volatility, the Company historically relied on the volatilities from publicly-traded companies with similar business models as its common stock lacked enough trading history for it to utilize its own historical volatility. Effective July 1, 2019, the Company uses available historical volatility of the Company’s common stock over a period of time corresponding to the expected stock option term. The Company uses the simplified method to calculate the expected term of stock option grants to employees as the Company does not have sufficient historical exercise data to provide a reasonable basis upon which to estimate the expected term of stock options granted to employees. Accordingly, the expected life of the options granted is based on the average of the vesting term, which is generally four years and the contractual term, which is generally ten years. The Company will continue to evaluate the appropriateness of utilizing such method. The risk-free interest rate is based on United States Treasury yields in effect at the date of grant for periods corresponding to the expected stock option term.
The Company has computed the fair value of all options granted using the Black-Scholes-Merton model during the years ended December 31, 2019 and 2018, using the following assumptions:
Year Ended December 31,
2019 2018
Expected volatility 35% to 55% 35%   
Expected dividends None    None   
Expected term (years) 7 7
Risk-free rate 1.89% to 2.61% 2.53% to 2.90%
Forfeiture rate 20%    20%   
The information below summarizes the stock options:
Number of
Shares
Weighted
Average
Exercise
Price
Weighted
Average
Remaining
Contractual Life
Outstanding at December 31, 2017 1,003,916    $ 4.18    8.1
Granted at market price 145,792    7.00   
Exercised (95,162)   3.48   
Cancelled (67,855)   3.37   
Outstanding at December 31, 2018 986,691    $ 4.72    6.8
Granted at market price 65,759    12.31   
Exercised (103,205)   5.28   
Cancelled —    —   
Outstanding at December 31, 2019 949,245    $ 5.19    6.5
Exercisable at December 31, 2019 592,265    $ 4.54    5.9

The aggregate intrinsic value of the Company's stock options exercised during 2019 and 2018 was $1,236,099 and $412,952, respectively.
The aggregate intrinsic value of the Company’s stock options outstanding and expected to vest was $9,788,395 at December 31, 2019.
The aggregate intrinsic value of the Company’s stock options exercisable was $6,872,930 at December 31, 2019.
The weighted-average grant-date fair value of the Company's stock options granted during 2019 and 2018 was $5.21 and $2.95, respectively.
The aggregate fair value of the Company's stock options vested during 2019 and 2018 was $388,672 and $509,729, respectively.
For the years ended December 31, 2019 and 2018, stock-based compensation expense for stock options was $418,301 and $363,568, respectively.
Unrecognized stock-based compensation expense for stock options as of December 31, 2019 was $729,263, which is expected to be recognized ratably over the next 2.5 years.
Restricted Stock
Restricted stock awards granted to employees generally vest in four equal annual installments. Restricted stock awards granted to non-employee directors vest on the earlier of (i) one year from the grant date and (ii) the date of the next annual meeting of the shareholders of the Company occurring after the date of grant.
The information below summaries the restricted stock activity:
Restricted Stock Awards Shares Weighted Average Grant-Date Fair Value per Award
Non-vested at December 31, 2018 51,134    $ 7.64   
Granted 26,131    $ 14.30   
Vested (38,289)   $ 7.44   
Cancelled —    $ —   
Non-vested at December 31, 2019 38,976    $ 12.31   
For the years ended December 31, 2019 and 2018, stock-based compensation expense for restricted stock was $302,350 and $264,862, respectively. Unrecognized stock-based compensation expense for restricted stock awards as of December 31, 2019 was $321,031 to be recognized ratably over 2.1 years.
Warrants
In conjunction with the IPO, the Company issued warrants to the underwriters for the purchase of 90,000 shares of common stock, which were exercisable between November 10, 2015 and November 10, 2018 at an exercise price of $8.125 per share. The fair value of the warrants was determined using the Black-Scholes-Merton option valuation model. The unexercised warrants expired on November 10, 2018.