Segment Information - Sales Details of Customers Locations in Four Geographic Regions (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Geographic, Customer and Supplier Information
Revenue	$ 62,928	$ 58,838	$ 55,733	$ 57,607	$ 56,622	$ 57,147	$ 52,790	$ 52,447	$ 235,106	$ 219,006	$ 214,481
Gross profit	43,466	40,669	34,294	39,286	37,955	38,431	35,506	36,678	$ 157,715	$ 148,570	$ 142,935
Gross margin									67.00%	68.00%	67.00%
Operating income (loss)	1,817	(4,794)	(17,764)	(8,130)	(4,009)	(5,625)	(8,238)	(9,243)	$ (28,871)	$ (27,115)	$ (26,128)
Corporate operating expenses not allocated at the segment level	$ 41,649	$ 45,463	$ 52,058	$ 47,416	$ 41,964	$ 44,056	$ 43,744	$ 45,921	186,586	175,685	169,063
Interest income (expense), net									2,090	595	(1)
Other income (expense), net									(532)	14,827	(14)
Loss before income taxes									(27,313)	(11,693)	(26,143)
Amortization of intangible assets									2,353	4,139	5,888
Digital Agreements
Geographic, Customer and Supplier Information
Revenue									50,925	48,401	40,551
Gross profit									$ 37,742	$ 37,488	$ 29,557
Gross margin									74.00%	77.00%	73.00%
Operating income (loss)									$ (18,525)	$ 5,348	$ (1,612)
Amortization of intangible assets									2,300	2,300	2,500
Security Solutions
Geographic, Customer and Supplier Information
Revenue									184,181	170,605	173,930
Gross profit									$ 119,974	$ 111,082	$ 113,378
Gross margin									65.00%	65.00%	65.00%
Operating income (loss)									$ 60,190	$ 32,051	$ 35,395
Amortization of intangible assets									0	1,800	3,300
Operating Segments
Geographic, Customer and Supplier Information
Operating income (loss)									41,665	37,399	33,783
Corporate operating expenses not allocated at the segment level									$ 70,536	$ 64,514	$ 59,911