Information Regarding Net Revenue and Gross Profit by Segment (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Segment Reporting Information [Line Items]
Net revenue	$ 31,846	$ 30,996	$ 87,398	$ 83,914
Gross profit	$ 11,941	$ 11,188	$ 32,000	$ 30,364
Gross profit margin	37.00%	36.00%	37.00%	36.00%
Operating expenses:
Research and development	$ 2,916	$ 2,625	$ 8,638	$ 7,633
Selling and marketing	5,641	5,326	17,617	15,709
General and administrative	2,939	2,639	8,790	7,623
Restructuring and severance	104	49	376	132
Total operating expenses	11,600	10,639	35,421	31,097
Income (Loss) from operations	341	549	(3,421)	(733)
Non-operating income (expense):
Interest expense, net	(211)	(39)	(351)	(101)
Gain on investment	132	0	132	30
Foreign currency gains (losses), net	(264)	(3)	(184)	111
Income (loss) before income tax benefit (provision)	(2)	507	(3,824)	(693)
Identity | Operating Segments
Segment Reporting Information [Line Items]
Net revenue	18,280	19,150	50,651	50,647
Gross profit	$ 3,764	$ 4,319	$ 10,894	$ 11,459
Gross profit margin	21.00%	23.00%	22.00%	23.00%
Premises | Operating Segments
Segment Reporting Information [Line Items]
Net revenue	$ 13,566	$ 11,846	$ 36,747	$ 33,267
Gross profit	$ 8,177	$ 6,869	$ 21,106	$ 18,905
Gross profit margin	60.00%	58.00%	57.00%	57.00%