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Shareholders' Equity (Deficit): (Tables)
9 Months Ended
Sep. 30, 2023
Shareholders' Equity (Deficit):  
Schedule of stock option activity

    

    

    

Weighted Average

    

Remaining

Number of

Weighted Average

Contractual Life

 

Shares

 

Exercise Price

 

(years)

 

 

Intrinsic Value

Outstanding, December 31, 2022

 

361,628

$

164.70

6.40

$

26,688,183

Granted

 

19,540

317.93

Exercised

 

(27,196)

115.98

Forfeited

 

(3,752)

204.26

Outstanding, September 30, 2023

 

350,220

$

176.61

6.06

$

68,825,900

Exercisable, September 30, 2023

 

215,375

$

142.02

4.60

$

49,774,400

Schedule of weighted average assumptions used in estimation of fair value of options granted

Nine Months Ended

    

September 30, 2023

September 24, 2022

Risk free interest rate

 

3.86

%

2.70

%

Expected life (years)

 

6

6

Expected volatility

 

28.04

%

27.47

%

Dividend yield

 

3.00

%

4.61

%

Option fair value

$

76.01

$

33.38