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Subsequent Events (Details) (USD $)	Mar. 07, 2014
Subsequent Event [Line Items]
Damages Awarded to Plaintiff	$ 1,400
Damages Sought by Defendant	$ 441,000

X

- Definition

Damages awarded to Plaintiff

+ References

No definition available.

+ Details

Name:	buks_DamagesAwardedToPlaintiff
Namespace Prefix:	buks_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Defendant's alleged counter claim amount.

+ References

No definition available.

+ Details

Name:	buks_DamagesSoughtByDefendant
Namespace Prefix:	buks_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

X

- Details

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