Condensed Consolidated Statements Of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Revenues:
Total revenues	$ 5,131	$ 5,867	$ 10,071	$ 11,687
Cost of revenues:
Total cost of revenues	1,260	1,549	2,670	3,116
Gross profit	3,871	4,318	7,401	8,571
Operating expenses:
Research and development	1,930	2,184	3,755	4,214
Sales and marketing	2,687	5,173	6,495	9,649
General and administrative	2,251	2,142	4,694	4,669
Amortization of purchased intangibles	153	163	309	325
Total operating expenses	7,021	9,662	15,253	18,857
Operating loss	(3,150)	(5,344)	(7,852)	(10,286)
Other income (expense):
Employee Retention Credit income	649	0	649	0
Interest expense, net	(39)	(15)	(109)	(69)
Decrease in fair value of derivative liability	0	0	0	37
Decrease in fair value of warrant liability	51	1,018	117	1,375
Other, net	(156)	(89)	(184)	(27)
Total other income (expense), net	505	914	473	1,316
Loss before income taxes	(2,645)	(4,430)	(7,379)	(8,970)
Income tax benefit	(23)	(109)	(117)	(199)
Net loss	$ (2,622)	$ (4,321)	$ (7,262)	$ (8,771)
Net loss per share – basic (in dollars per share)	$ (0.15)	$ (0.24)	$ (0.40)	$ (0.51)
Weighted average number of shares outstanding, basic (in shares)	18,072	17,741	18,042	17,096
Net loss available to common stockholders, diluted	$ (2,622)	$ (5,339)	$ (7,262)	$ (10,146)
Net loss per share – diluted (in dollars per share)	$ (0.15)	$ (0.30)	$ (0.40)	$ (0.59)
Weighted average number of shares outstanding, diluted (in shares)	18,072	17,899	18,042	17,299
Software licenses and appliances
Revenues:
Total revenues	$ 278	$ 138	$ 389	$ 246
Cost of revenues:
Total cost of revenues	48	63	79	127
Service
Revenues:
Total revenues	4,853	5,729	9,682	11,441
Cost of revenues:
Total cost of revenues	$ 1,212	$ 1,486	$ 2,591	$ 2,989