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Goodwill (Details Textual)	Sep. 30, 2012
Percentage Of Goodwill On Assets	21.00%

X

- Definition

Percentage of goodwill on assets.

+ References

No definition available.

+ Details

Name:	bolt_PercentageOfGoodwillOnAssets
Namespace Prefix:	bolt_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant