Taxes on Income (Narrative) (Detail) (USD $)	Sep. 30, 2012	Dec. 31, 2011
Income Tax [Line Items]
Unrecognized tax benefits, total	$ 3,000	$ 88,000
Unrecognized tax benefits, accrued interest	3,000	15,000
Unrecognized tax benefits, Penalties accrued	$ 6,000	$ 6,000

This element represents the amount of statutory penalties accrued as of the date of the statement of financial position for a tax position claimed or expected to be claimed by the entity, in its tax return, that does not meet the minimum statutory threshold to avoid payment of penalties.

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This element represents the amount of interest expense accrued as of the date of the statement of financial position for an underpayment of income taxes computed by applying the applicable statutory rate of interest to the difference between a tax position recognized for financial reporting purposes and the amount previously taken or expected to be taken in a tax return of the entity.

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