Inventories (Details Textual) (Inventory Valuation Reserve [Member], USD $)	12 Months Ended
Jun. 30, 2013
Inventory Valuation Reserve [Member]
Valuation Allowances and Reserves, Recoveries	$ 107,000

It represent increase in the value of valuation allowance and reserves.

No definition available.

Name:	bolt_ValuationAllowancesAndReservesPeriodIncrease
Namespace Prefix:	bolt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration