v2.4.1.9

Related Party Transactions (Details Textual) (USD $)	12 Months Ended
	Dec. 31, 2014
Catalyst Financial Llc [Member]
Related Party Transaction [Line Items]
Monthly License Fee	$ 2,000bkfg_MonthlyLicenseFee / us-gaap_StatementGeographicalAxis = bkfg_CatalystFinancialLlcMember
Qualstar Corporation [Member]
Related Party Transaction [Line Items]
Annual License Fee	14,400bkfg_AnnualLicenseFee / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = bkfg_QualstarCorporationMember
Monthly License Fee	1,200bkfg_MonthlyLicenseFee / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = bkfg_QualstarCorporationMember
Bronson co [Member]
Related Party Transaction [Line Items]
Monthly License Fee	500bkfg_MonthlyLicenseFee / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = bkfg_BronsonCoMember
Net Software [Member]
Related Party Transaction [Line Items]
Monthly License Fee	100bkfg_MonthlyLicenseFee / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = bkfg_NetSoftwareMember
Ridge Field [Member]
Related Party Transaction [Line Items]
Monthly License Fee	$ 100bkfg_MonthlyLicenseFee / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = bkfg_RidgeFieldMember

X

- Definition

Represents the annual license fee during the period.

+ References

No definition available.

+ Details

Name:	bkfg_AnnualLicenseFee
Namespace Prefix:	bkfg_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of monthly license fee paid during the period.

+ References

No definition available.

+ Details

Name:	bkfg_MonthlyLicenseFee
Namespace Prefix:	bkfg_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Details

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

X

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=bkfg_BronsonCoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=bkfg_NetSoftwareMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=bkfg_QualstarCorporationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=bkfg_RidgeFieldMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementGeographicalAxis=bkfg_CatalystFinancialLlcMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: