Information Regarding Net Revenue and Gross Profit by Segment (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Net revenue	$ 86,920	$ 83,755
Gross profit	$ 33,681	$ 36,654
Gross profit margin	39.00%	44.00%
Operating expenses:
Research and development	$ 9,781	$ 8,616
Selling and marketing	17,270	18,138
General and administrative	8,623	9,445
Increase (decrease) in fair value of earnout liability	(261)	550
Restructuring and severance	1,716	14
Total operating expenses	37,129	36,763
Loss from operations	(3,448)	(109)
Non-operating income (expense):
Interest expense, net	(1,462)	(917)
Gain on sale of investment		142
Foreign currency gains (losses), net	(122)	59
Loss before income tax provision	(5,032)	(825)
Identity
Segment Reporting Information [Line Items]
Net revenue	52,742	42,176
Gross profit	$ 14,781	$ 14,570
Gross profit margin	28.00%	35.00%
Premises
Segment Reporting Information [Line Items]
Net revenue	$ 34,178	$ 41,579
Gross profit	$ 18,900	$ 22,084
Gross profit margin	55.00%	53.00%