Contingencies - Additional Information (Details 2) (Business Interruption Caused by Flood [Member], Components and Sensors, Continuing Operations [Member], THAILAND, USD $)	12 Months Ended
Dec. 31, 2012
Business Interruption Caused by Flood [Member] \| Components and Sensors \| Continuing Operations [Member] \| THAILAND
Extraordinary items
Insurance recovery	$ 637,000

The amount recovered from insurance. These recoveries reduce costs and losses that are reported as a separate line item under operating expenses.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.3)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

Name:	us-gaap_InsuranceRecoveries
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration