Information Regarding Net Revenue by Geographic Region (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Segment Reporting Information [Line Items]
Net revenue	$ 14,934	$ 16,854
Percentage of net revenue	100.00%	100.00%
Americas
Segment Reporting Information [Line Items]
Net revenue	$ 9,958	$ 8,312
Percentage of net revenue	67.00%	49.00%
Europe And Middle East
Segment Reporting Information [Line Items]
Net revenue	$ 2,842	$ 4,698
Percentage of net revenue	19.00%	28.00%
Asia-Pacific
Segment Reporting Information [Line Items]
Net revenue	$ 2,134	$ 3,844
Percentage of net revenue	14.00%	23.00%