Inventories - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2013
Inventory Disclosure [Abstract]
Inventory balance description	Our net inventory balance consisted of approximately $0.1 million of components and $0.1 million of finished goods.
Inventory components products	$ 0.1
Inventory finished goods	$ 0.1