Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

No definition available.

Name:	us-gaap_LeaseAndRentalExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Leases - Additional Information (Detail) $ in Thousands	3 Months Ended	12 Months Ended
Leases - Additional Information (Detail) $ in Thousands	Mar. 31, 2014	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2013 ft²
Leases [Abstract]
Lease covered area \| ft²				13,000
Term of lease	64 months
Lease expiration year		2021
Rental expense \| $		$ 700	$ 680