Operating Leases as Lessor - Additional Information (Detail) (Namtai Shenzhen)	12 Months Ended
Dec. 31, 2014
Operating Leased Assets [Line Items]
Lease agreement date	Mar. 25, 2014
Buildings
Operating Leased Assets [Line Items]
Lease expiration term	3 years
Beginning date of lease term	May 01, 2014
Ending date of lease term	Apr. 30, 2017

Term of the lessor's leasing arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

Name:	us-gaap_LessorLeasingArrangementsOperatingLeasesTermOfContract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration