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Stock Compensation (Tables)
9 Months Ended
Sep. 30, 2021
Share-based Payment Arrangement [Abstract]  
Summary of Share-based Payment Arrangement, Expensed and Capitalized, Amount

The following tables summarize the stock-based compensation expense for stock options and restricted stock awards granted to employees and nonemployees that was recorded in the Company’s statements of operations and comprehensive loss for the three and nine months ended September 30, 2021 and 2020.

 

 

 

Three Months Ended
September 30,

 

 

Nine Months Ended
September 30,

 

 

 

2021

 

 

2020

 

 

2021

 

 

2020

 

Research and development

 

$

313

 

 

$

 

 

$

606

 

 

$

4

 

General and administrative

 

 

620

 

 

 

55

 

 

 

1,444

 

 

 

184

 

Total stock-based compensation expense

 

$

933

 

 

$

55

 

 

$

2,050

 

 

$

188

 

 

 

 

 

Three Months Ended
September 30,

 

 

Nine Months Ended
September 30,

 

 

 

2021

 

 

2020

 

 

2021

 

 

2020

 

Employees

 

$

776

 

 

$

53

 

 

$

1,878

 

 

$

182

 

Nonemployees

 

 

157

 

 

 

2

 

 

 

172

 

 

 

6

 

Total stock-based compensation expense

 

$

933

 

 

$

55

 

 

$

2,050

 

 

$

188

 

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions

The fair value of stock options granted during the three and nine months ended September 30, 2021 and 2020 was estimated using the Black-Scholes option pricing model based on the following weighted average assumptions. There were no stock options granted during the three months ended September 30, 2020.

 

 

 

Three Months Ended
September 30,

 

Nine Months Ended
September 30,

 

 

2021

 

2021

 

2020

Expected term (in years)

 

6.1

 

5.5 – 6.1

 

5.5 – 6.1

Expected volatility

 

75.4% – 75.8%

 

75.4% – 76.6%

 

74.0% – 75.7%

Risk-free rate

 

0.9% – 1.0%

 

0.6% – 1.1%

 

0.4% – 1.7%

Dividend yield

 

  —

 

  —

 

  —

Summary of Share-based Compensation Arrangements by Share-based Payment Award

Stock option activity under the 2017 EIP and 2021 EIP was as follows:

 

 

 

NUMBER OF
OPTIONS

 

 

WEIGHTED-
AVERAGE
EXERCISE
PRICE PER
SHARE

 

 

WEIGHTED-
AVERAGE
REMAINING
CONTRACTUAL
LIFE (YEARS)

 

 

AGGREGATE
INTRINSIC
VALUE (000s)

 

Balance – December 31, 2020

 

 

1,855,507

 

 

$

2.99

 

 

 

9.79

 

 

$

8

 

Granted

 

 

1,188,064

 

 

 

8.98

 

 

 

 

 

 

 

Exercised

 

 

(145,805

)

 

 

3.77

 

 

 

 

 

 

 

Cancelled and forfeited

 

 

(3,095

)

 

 

9.38

 

 

 

 

 

 

 

Balance – September 30, 2021

 

 

2,894,671

 

 

 

5.43

 

 

 

9.35

 

 

$

34,521

 

Options exercisable – September 30, 2021

 

 

82,944

 

 

 

3.42

 

 

 

8.96

 

 

$

1,155

 

Vested and expected to vest –September 30, 2021

 

 

2,894,671

 

 

$

5.43

 

 

 

9.35

 

 

$

34,521

 

Summary of Share-based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity

The following table summarizes the activity for the Company’s restricted stock for the nine months ended September 30, 2021.

 

 

 

NUMBER OF
SHARES

 

Unvested as of December 31, 2020

 

 

41,363

 

Vested

 

 

(37,226

)

Unvested as of September 30, 2021

 

 

4,137