Information Regarding Net Revenue and Gross Profit by Segment (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Segment Reporting Information [Line Items]
Net revenue	$ 25,061	$ 22,162
Gross profit	$ 8,966	$ 7,692
Gross profit margin	36.00%	35.00%
Operating expenses:
Research and development	$ 2,529	$ 2,337
Selling and marketing	5,110	4,064
General and administrative	2,488	2,125
Restructuring and severance	(140)	388
Total operating expenses	9,987	8,914
Loss from operations	(1,021)	(1,222)
Non-operating income (expense):
Interest expense, net	(25)	(245)
Gain on investment	24
Foreign currency gains, net	19	46
Loss before income tax benefit (provision)	(1,003)	(1,421)
Identity
Segment Reporting Information [Line Items]
Net revenue	14,579	13,658
Gross profit	$ 3,159	$ 3,359
Gross profit margin	22.00%	25.00%
Premises
Segment Reporting Information [Line Items]
Net revenue	$ 10,482	$ 8,504
Gross profit	$ 5,807	$ 4,333
Gross profit margin	55.00%	51.00%