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Stockholders' Equity (Tables)
3 Months Ended
Mar. 31, 2022
Stockholders' Equity [Abstract]  
Restricted Stock Activity

Shares

Weighted
average grant
date fair value

Unvested at December 31, 2021

65,100

$

4.10

Granted

240,777

1.52

Vested

(121,232)

2.14

Forfeited

Unvested at March 31, 2022

184,645

$

2.03

Stock Option Activity

Number of
options

Weighted
average
exercise price

Outstanding at December 31, 2021

663,425

$

4.31

Issued

209,755

1.55

Exercised

Forfeited

Expired

Outstanding at March 31, 2022

873,180

$

3.65

Exercisable at March 31, 2022

624,075

$

4.31

Stock Option Grants Weighted Average Assumptions

2022

Expected volatility

103%

Risk free interest rate

2.10%

Expected dividend yield

0%

Expected life (in years)

5

Information About Options Outstanding and Exercisable

Weighted
average exercise
price of outstanding
options

Number of
options
outstanding

Weighted
average remaining
estimated life
(in years)

Number of
options
exercisable

$1.52 - $2.50

732,288

7.9

503,779

$5.44 - $6.72

55,402

8.2

34,789

$7.50 - $10.80

16,403

2.1

16,403

$14.20 - $23.40

69,087

4.0

69,087

873,180

624,058