Information Regarding Net Revenue and Gross Profit by Segment (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Net revenue	$ 103,769	$ 86,920
Gross profit	$ 37,067	$ 33,681
Gross profit margin	36.00%	39.00%
Operating expenses:
Research and development	$ 8,673	$ 9,781
Selling and marketing	17,033	17,270
General and administrative	11,891	8,623
Decrease in fair value of earnout liability		(261)
Restructuring and severance	817	1,716
Total operating expenses	38,414	37,129
Loss from operations	(1,347)	(3,448)
Non-operating income (expense):
Interest expense, net	(483)	(1,462)
Gain on forgiveness of Paycheck Protection Program note	2,946
Gain on investment	611
Foreign currency losses, net	(79)	(122)
Income (loss) before income tax provision	1,648	(5,032)
Identity
Segment Reporting Information [Line Items]
Net revenue	64,725	52,742
Gross profit	$ 15,670	$ 14,781
Gross profit margin	24.00%	28.00%
Premises
Segment Reporting Information [Line Items]
Net revenue	$ 39,044	$ 34,178
Gross profit	$ 21,397	$ 18,900
Gross profit margin	55.00%	55.00%