Segment, Customer Concentration and Geographical Information - Company Revenue in Different Geographic Locations (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Revenue from External Customer [Line Items]
Total revenues	$ 9,448	$ 8,746	$ 26,425	$ 30,832
Americas [Member]
Revenue from External Customer [Line Items]
Total revenues	8,859	8,318	25,447	29,340
EMEA [Member]
Revenue from External Customer [Line Items]
Total revenues	541	166	719	788
Asia Pacific [Member]
Revenue from External Customer [Line Items]
Total revenues	$ 48	$ 262	$ 259	$ 704