Subsequent Events -Additional Information (Detail) (Business Acquisition [Member], Micronetics, USD $)	Aug. 08, 2012
Business Acquisition [Member] \| Micronetics
Subsequent Event [Line Items]
Company acquired per share	$ 14.80

For an acquired entity, price of a single share of a number of saleable stocks of a company.

No definition available.

Name:	us-gaap_BusinessAcquisitionSharePrice
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant