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Equity (Tables)
3 Months Ended
Mar. 31, 2020
Equity [Abstract]  
Summary of Stock Option Activity

A summary of stock option activity for the three months ended March 31, 2020 is as follows:

 

   

Number

of Options

(in shares)

   

Weighted

Average

Exercise

Price Per
Share

    Weighted
Average
Remaining
Contractual Life
    Aggregate
Intrinsic
Value
 
Outstanding at December 31, 2019     1,364,490     $ 1.87       1.81 years     $ 46,000  
Granted     65,000       0.37                  
Exercised     (96,250 )      0.19                  
Forfeited or expired     (524,430 )     2.43                  
Outstanding at March 31, 2020     808,810     $ 1.59       3.3 years     $  
Exercisable at March 31, 2020     585,726     $ 2.06       2.2 years     $  

Schedule of Stock Options Fair Value Assumptions Estimated Using Black-Scholes Pricing Model

The fair value of the options granted of $14,000 was estimated on the grant date using the Black-Scholes option-pricing model with the following weighted average assumptions:

 

Risk-free interest rate     1.5 %
Expected term of options     3.7 years  
Expected annual volatility     110 %
Expected dividend yield     %

Summary of Warrant Activity

The Company previously issued warrants at exercise prices equal to or greater than market value of the Company’s common stock at the date of issuance. A summary of warrant activity follows:

 

   

Number

of Warrants

(in shares)

    Weighted
Average
Exercise
Price Per Share
    Weighted
Average
Remaining
Contractual Life
 
Outstanding at December 31, 2019     2,177,857     $ 1.28       4 months  
Granted                    
Exercised                    
Forfeited or expired                    
Outstanding at March 31, 2020     2,177,857     $ 1.28       1 month