Summary of Significant Accounting Policies - Schedule of Non-Controlling Interest in Subsidiary (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Temporary Equity Disclosure [Abstract]
Balance at the beginning of the period			$ 337	$ 97
Net loss attributable to Silver Creek	(181)	(169)	(350)	(339)
Balance at the end of the period	$ (13)	$ (242)	$ (13)	$ (242)