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A summary of stock option activity during the nine months ended September 30, 2022 is as follows: (Details)
$ / shares in Units, $ in Thousands
 9 Months Ended
Sep. 30, 2022
USD ($)
$ / shares
shares
Equity [Abstract]  
Outstanding at beginning of period | shares 647,667
Outstanding at beginning of period | $ / shares $ 5.53
Granted | shares 27,000
Granted | $ / shares $ 3.17
Exercised | shares (4,000)
Exercised | $ / shares $ 4.11
Outstanding at end of period | shares 670,667
Outstanding at end of period | $ / shares $ 5.45
Outstanding at end of period 5 years 10 months 24 days
Outstanding at end of period | $ $ 58
Exercisable at end of period | shares 643,667
Exercisable at end of period | $ / shares $ 5.54
Exercisable at end of period 5 years 8 months 12 days
Exercisable at end of period | $ $ 58