Samsung Commercial Agreement - Additional Information (Detail) - Samsung Commercial Agreement	Jun. 04, 2014 Product
Long-term Purchase Commitment [Line Items]
Minimum purchase commitment	1,000,000
Purchase commitment period	12 months
Purchase commitment period extension	3 months
Agreement term	2 years

Number of units of goods that must be purchased within the specified time period of the agreement to avoid penalties or unfavorable effects on pricing, among other adverse consequences.

No definition available.

Name:	us-gaap_LongTermPurchaseCommitmentMinimumQuantityRequired
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration