Information Regarding Net Revenue and Gross Profit by Segment (Detail) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2019	Mar. 31, 2018
Segment Reporting Information [Line Items]
Net revenue	$ 19,522	$ 16,528
Gross profit	$ 8,704	$ 6,508
Gross profit margin	45.00%	39.00%
Operating expenses:
Research and development	$ 2,026	$ 1,687
Selling and marketing	4,498	3,903
General and administrative	2,622	2,555
Restructuring and severance	(12)	110
Total operating expenses	9,134	8,255
Loss from operations	(430)	(1,747)
Non-operating income (expense):
Interest expense, net	(279)	(476)
Foreign currency losses, net	(2)	(38)
Loss before income taxes and noncontrolling interest	(711)	(2,261)
Premises
Segment Reporting Information [Line Items]
Net revenue	9,330	7,506
Gross profit	$ 4,379	$ 4,155
Gross profit margin	47.00%	55.00%
Identity
Segment Reporting Information [Line Items]
Net revenue	$ 10,192	$ 9,022
Gross profit	$ 4,325	$ 2,353
Gross profit margin	42.00%	26.00%

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Amount before tax of foreign currency transaction realized and unrealized gain (loss) recognized in the income statement.

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