March 31,

Three Months Ended March 31,

2022

2022

2021

Share prices of our common stock

$5.86

$3.88 - $5.86

$22.41 - $64.29

Expected volatilities

44.74%

44.42% - 48.51%

41.50% - 41.50%

Risk-free rates of return

2.38%

1.66% - 2.39%

1.05% - 1.05%

Expected option terms (years)

5.31

5.31 - 6.00

6.00 - 6.00

Calculated option values

$2.68

$0.69 - $3.44

$18.52 - $18.52

March 31,
2022

December 31, 2021

Share price of our common stock

$

5.86

$

8.52

Expected volatility

49.4

%

47.6

%

Risk-free rate of return

2.41

%

1.11

%

Expected warrant term (years)

3.75

3.99

Fair value determined per warrant

$

1.17

$

2.45