Income Taxes - Period for which prior cumulative losses considered in assessing the realization of deferred tax assets (Details)	12 Months Ended
Dec. 31, 2015
Income Taxes
Period for which prior cumulative losses considered in assessing the realization of deferred tax assets	2 years

Represents the period for which prior cumulative losses are considered in assessing the realization of deferred tax assets.

No definition available.

Name:	byfc_DeferredTaxAssetValuationAllowanceLookbackPeriod
Namespace Prefix:	byfc_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration