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Salisbury issued stock options in conjunction with its acquisition of Riverside Bank in 2014. The table below reflects the remaining outstanding options related to this transaction and presents a summary of the status of Salisbury's outstanding stock opti (Details) - Outstanding Stock Options [Member] - USD ($)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]    
Number of options, beginning of period 17,820 22,545
Weighted average exercise price, beginning of period $ 17.04 $ 17.04
Number of options, granted
Weighted average exercise price, granted
Number of options, exercised (3,105) (4,725)
Weighted average exercise price, exercised $ 17.04 $ 17.04
Number of options, forfeited or expired
Weighted average exercise price, forfeited or expired
Number of options, end of period 14,715 17,820
Weighted average exercise price, end of period $ 17.04 $ 17.04
Weighted average remaining contractual term, end of period 3 years 4 years
Aggregate intrinsic value, end of period $ 297,684 $ 510,187