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INVESTMENTS AVAILABLE FOR SALE (Details Textual) - USD ($) $ in Thousands | 6 Months Ended
--- | ---
Jun. 30, 2018 | Jun. 30, 2017
Gain On Investments, Pretax Recognised | $ 3,000 | $ 0

X
- Definition Amount of gain or loss earned on investments that is recognised before tax. + References No definition available. + Details
Name: | bcml_GainlossOnInvestmentsPretaxRecognised
Namespace Prefix: | bcml_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration