CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Revenue:
Total revenue	$ 4,692	$ 4,419
Costs and expenses:
Cost of sales	314	383
Research and development	2,424	2,396
Selling and marketing	1,781	1,652
General and administrative	1,461	1,437
Total costs and expenses	5,980	5,868
Operating loss	(1,288)	(1,449)
Interest income	9	1
Net loss	$ (1,279)	$ (1,448)
Net loss per share – basic	$ (0.06)	$ (0.07)
Net loss per share – diluted	$ (0.06)	$ (0.07)
Weighted-average shares – basic	21,642	21,494
Weighted-average shares – diluted	21,642	21,494
Software licenses
Revenue:
Total revenue	$ 2,628	$ 2,367
Software maintenance
Revenue:
Total revenue	1,661	1,536
Services and other
Revenue:
Total revenue	$ 403	$ 516