Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity (Tables)

v3.21.2
Stockholders' Equity (Tables)
6 Months Ended
Jun. 30, 2021
Stockholders' Equity  
Schedule of common stock warrants outstanding

    

Common Stock 

Warrants

Outstanding, December 31, 2020

 

758,939

Issued

 

31,000

Expired

 

(42,556)

Outstanding, June 30, 2021

 

747,383

Schedule of stock option valuation assumptions

The following table summarizes weighted-average assumptions used in our calculations of fair value for the six months ended June 30, 2021 and 2020:

    

2021

2020

Dividend yield

 

%  

%

Expected volatility

 

101.43

%  

89.61

%

Risk-free interest rate

 

0.43

%  

0.86

%

Expected lives (years)

 

5.5

years

5.9

years

Schedule of stock option activity

    

    

Weighted

 

 

Weighted

Average

 

Aggregate

 

Average

Exercise

 

Intrinsic

 

Remaining

Shares

Price

 

Value

 

Contractual Life

Stock options outstanding at December 31, 2020

1,480,139

$

11.05

$

1,051,560

Granted

 

329,901

 

5.67

 

Exercised

 

(69,493)

 

6.57

$

46,403

Forfeited/Expired

 

(66,743)

 

11.46

 

Stock options outstanding at June 30, 2021

 

1,673,804

$

10.15

$

1,271,169

8.8

Years

Stock options exercisable at June 30, 2021

1,044,221

$

12.87

$

481,213

8.5

Years

Schedule of restricted stock activity

Weighted

Average

Shares

Fair Value

Restricted stock at December 31, 2020

239,928

$

4.02

Granted

426,372

5.67

Vested

(406,426)

5.15

Cancelled

Restricted stock at June 30, 2021

259,874

$

4.96

Schedule of RSU activity

Weighted

Average

Shares

Fair Value

RSUs at December 31, 2020

1,900

$

26.60

Vested

 

(1,900)

 

26.60

Cancelled

 

 

RSUs at June 30, 2021

 

$