Remaining outstanding options related to acquisition of Riverside Bank and summary of status of Salisbury's outstanding stock options (Details) - Outstanding Stock Options [Member] - USD ($)	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Number of options, beginning of period	14,715	17,820
Weighted average exercise price, beginning of period	$ 17.04	$ 17.04
Number of options, beginning of period
Weighted average exercise price, beginning of period
Number of options, beginning of period	(1,755)	(3,105)
Weighted average exercise price, beginning of period	$ 17.04	$ 17.04
Number of options, beginning of period
Weighted average exercise price, beginning of period
Number of options, beginning of period	12,960	14,715
Weighted average exercise price, beginning of period	$ 17.04	$ 17.04
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term	2 years	3 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value	$ 491,443	$ 297,684

For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

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Weighted average price of options that were either forfeited or expired.

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Gross number of share options (or share units) granted during the period.

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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Number of options outstanding, including both vested and non-vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Amount by which current fair value of underlying stock exceeds exercise price of fully vested and expected to vest options outstanding. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Number of share options (or share units) exercised during the current period.

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