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Note 1 - Summary of Significant Accounting Policies (Details)	Mar. 31, 2014
Accounting Policies [Abstract]
Number Of Wholly Owned Trusts	2

X

- Definition

Number of wholly-owned trusts.

+ References

No definition available.

+ Details

Name:	boch_NumberOfWhollyOwnedTrusts
Namespace Prefix:	boch_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Details

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