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Stock Option Plans (Tables)
9 Months Ended
Sep. 30, 2022
Stock Option Plans  
Schedule of stock option activity

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Options Outstanding

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Weighted ‑

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Shares

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Average

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Available

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Number of 

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Exercise

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for Grant

    

Options

    

Price

Balance at December 31, 2021

 

2,806,953

 

6,354,308

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$

6.80

Additional shares authorized

 

1,862,000

 

—

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—

Options granted

 

(1,704,400)

 

1,704,400

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1.02

Options forfeited

 

988,840

 

(988,840)

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7.77

Balance at September 30, 2022

 

3,953,393

 

7,069,868

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$

5.27