Information Regarding Net Revenue by Geographic Region (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
Segment Reporting Information [Line Items]
Net revenue	$ 22,712	$ 20,909	$ 61,867	$ 54,745
Percentage of net revenue	100.00%	100.00%	100.00%	100.00%
Americas
Segment Reporting Information [Line Items]
Net revenue	15,655	12,561	38,933	29,835
Percentage of net revenue	69.00%	60.00%	63.00%	55.00%
Europe And Middle East
Segment Reporting Information [Line Items]
Net revenue	3,930	5,036	12,722	15,594
Percentage of net revenue	17.00%	24.00%	21.00%	28.00%
Asia-Pacific
Segment Reporting Information [Line Items]
Net revenue	$ 3,127	$ 3,312	$ 10,212	$ 9,316
Percentage of net revenue	14.00%	16.00%	16.00%	17.00%