Information Regarding Net Revenue and Gross Profit by Segment (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Segment Reporting Information [Line Items]
Net revenue	$ 30,996	$ 29,097	$ 83,914	$ 75,252
Gross profit	$ 11,188	$ 11,118	$ 30,364	$ 27,650
Gross profit margin	36.00%	38.00%	36.00%	37.00%
Operating expenses:
Research and development	$ 2,625	$ 2,088	$ 7,633	$ 6,556
Selling and marketing	5,326	4,471	15,709	12,682
General and administrative	2,639	2,400	7,623	7,120
Restructuring and severance	49	99	132	761
Total operating expenses	10,639	9,058	31,097	27,119
Income (loss) from operations	549	2,060	(733)	531
Non-operating income (expense):
Interest expense, net	(39)	(62)	(101)	(451)
Gain on forgiveness of Paycheck Protection Program note				2,946
Gain on investment		611	30	611
Foreign currency gains (losses), net	(3)	(48)	111	(2)
Income (loss) before income tax benefit (provision)	507	2,561	(693)	3,635
Identity
Segment Reporting Information [Line Items]
Net revenue	19,150	18,745	50,647	47,199
Gross profit	$ 4,319	$ 5,211	$ 11,459	$ 12,133
Gross profit margin	23.00%	28.00%	23.00%	26.00%
Premises
Segment Reporting Information [Line Items]
Net revenue	$ 11,846	$ 10,352	$ 33,267	$ 28,053
Gross profit	$ 6,869	$ 5,907	$ 18,905	$ 15,517
Gross profit margin	58.00%	57.00%	57.00%	55.00%