Consolidated Statements of Operations and Comprehensive Loss (Unaudited) - USD ($) shares in Thousands, $ in Thousands		3 Months Ended
		Mar. 31, 2023	Mar. 31, 2022
Revenue:
Revenue		$ 7,843	$ 7,411
Cost of revenue:
Cost of revenue		3,599	4,067
Gross profit		4,244	3,344
Operating expenses:
Sales and marketing		6,298	7,945
Research, development and engineering		7,826	6,091
General and administrative		4,627	6,408
Amortization expense on acquired intangible assets		260	342
Impairment of lease right of use assets and leasehold improvements		0	574
Total operating expenses		19,011	21,360
Operating loss		(14,767)	(18,016)
Other income (loss), net		745	(4)
Loss before income taxes		(14,022)	(18,020)
(Provision) benefit for income taxes		(18)	239
Net loss		$ (14,040)	$ (17,781)
Loss per common share:
Loss per common share — basic (in dollars per share)		$ (0.70)	$ (1.03)
Loss per common share — diluted (in dollars per share)		$ (0.70)	$ (1.03)
Weighted average common shares outstanding — basic (in shares)		20,093	17,344
Weighted average common shares outstanding — diluted (in shares)		20,093	17,344
Comprehensive loss:
Unrealized gain (loss) on marketable securities, net of tax of $0		$ 101	$ (198)
Foreign currency translation adjustment, net of tax of $0		775	(919)
Other comprehensive income (loss)		876	(1,117)
Net loss		(14,040)	(17,781)
Comprehensive loss		(13,164)	(18,898)
Subscription [Member]
Revenue:
Revenue		3,885	3,791
Cost of revenue:
Cost of revenue	[1]	795	1,042
Service [Member]
Revenue:
Revenue		3,958	3,620
Cost of revenue:
Cost of revenue	[1]	1,715	1,831
Amortization Expense On Acquired Intangible Assets [Member]
Cost of revenue:
Cost of revenue		$ 1,089	$ 1,194

[1] Cost of revenue for Subscription and Service excludes amortization expense on acquired intangible assets.