v2.4.0.6

Investments	3 Months Ended
	Mar. 31, 2012
Cash and Cash Equivalents [Abstract]
Investments In Available For Sale Securities [Text Block]	2. Investments Investments are classified as available-for-sale according to the provisions of ASC Topic 320, Investments - Debt & Equity Securities. Accordingly, the investments are carried at fair value with unrealized gains and losses reported separately in other comprehensive income. At March 31, 2012 the Company held 1,919,920 common shares of Qualstar valued at approximately $3,725,000.

X

- Definition

The entire disclosure of available-for-sale securities which consist of all investments in certain debt and equity securities neither classified as trading or held-to-maturity securities.

+ References

No definition available.

+ Details

Name:	bkfg_InvestmentsInAvailableForSaleSecuritiesTextBlock
Namespace Prefix:	bkfg_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Details

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