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Stockholders' Equity (Deficit) (Tables)
 6 Months Ended
Jun. 30, 2023
Equity [Abstract]  
Summary of Information Related to Stock Options
A summary of information related to stock options for the six months ended June 30, 2023 is as follows:
 
     
     
Options
 
 
Weighted

Average

Exercise Price
 
 
Intrinsic

Value
 
Outstanding as of December 31, 2022    
 
 
427,713
 
 
$
1.40
 
 
$
665,330
 
Forfeited    
 
 
(5,499
)
 
 
6.14
 
 
 
    
Outstanding as of June 30, 2023    
 
 
422,214
 
 
$
1.34
 
 
$
853,536
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Exercisable as of December 31, 2022    
 
 
271,481
 
 
$
1.37
 
 
$
551,123
 
Exercisable as of June 30, 2023    
 
 
284,402
 
 
$
1.59
 
 
$
650,570
 
Summary of Grant-date Fair Value of Stock Options Granted
The following table presents, on a weighted average basis, the assumptions used in the Black-Scholes option-pricing model to determine the grant-date fair value of stock options granted:
 
   
Six Months Ended
 
   
June 30,
 
   
2023
 
 
2022
 
Risk-free interest rate
 
 
n/a
 
 
 
1.92
%
Expected term (in years)
 
 
n/a
 
 
 
5.61
 
Expected volatility
 
 
n/a
 
 
 
35.00
%
Expected dividend yield
 
 
n/a
 
 
 
0
%
Summary of Statements of Operations
Stock-based compensation, including options and shares issued for services was classified in the statements of operations as follows:
 
   
Six Months Ended
 
   
June 30,
 
   
2023
 
 
2022
 
Sales and marketing
 
$
68,984
 
 
$
147,383
 
Research and development
 
 
38,353
 
 
 
45,517
 
General and administrative
 
 
95,695
 
 
 
274,306
 
   
$
203,032
 
 
$
467,206