XML 107 R89.htm IDEA: XBRL DOCUMENT v3.25.0.1

Stockholders' Equity and Stock Plans - Schedule of Cashless Exercise Information (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Equity [Abstract]
Number of shares withheld (in shares)	3,798	3,132	11,505
Total amount withheld (in thousands)	$ 64	$ 86	$ 393
Weighted-average price (in dollars per share)	$ 16.89	$ 27.57	$ 34.13

X

- Definition

Adjustments Related To Tax Withholding And Exercise Of Options For Share-Based Compensation

+ References

No definition available.

+ Details

Name:	bmrc_AdjustmentsRelatedToTaxWithholdingAndExerciseOfOptionsForShareBasedCompensation
Namespace Prefix:	bmrc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Share-based Compensation Arrangements by Share-based Payment Award, Options, Tax Withholding And Exercises in Period, Weighted Average Exercise Price

+ References

No definition available.

+ Details

Name:	bmrc_SharebasedCompensationArrangementsbySharebasedPaymentAwardOptionsTaxWithholdingAndExercisesinPeriodWeightedAverageExercisePrice
Namespace Prefix:	bmrc_
Data Type:	dtr-types1:perShareItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_EquityAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number of shares used to settle grantee's tax withholding obligation for award under share-based payment arrangement.

+ References

No definition available.

+ Details

Name:	us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration