CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Income Statement [Abstract]
Product revenues	$ 56	$ 150
Maintenance revenues	677	646
Cost of revenue, product	9	21
Cost of revenue, maintenance	110	98
Gross profit	614	677
Operating expense:
General and administrative	1,347	983
Sales and marketing	724	1,058
Research and development	1,168	1,868
Depreciation and amortization	18	18
Total	3,257	3,927
Loss from operations	(2,643)	(3,250)
Interest (income) expense, net	0	24
(Gain) loss on change in fair value of derivative liabilities	(1,172)	(197)
Loss on extinguishment of derivative liabilities	335	0
Other (income) expense, net	25	0
Other components of net periodic pension expense	(54)	(47)
Loss before income taxes	(1,885)	(3,124)
Income tax expense (income)	0	0
Net loss	(1,885)	(3,124)
Preferred dividends, preferred stock discount accretion and deemed dividends from preferred stock exchange	(2,255)	(1,374)
Net loss available to common shareholders	$ (4,140)	$ (4,498)
Basic income and diluted loss per common share - see Note 3:
Basic and diluted loss per share available to common shareholders	$ (0.02)	$ (0.04)
Basic and diluted weighted-average shares outstanding	245,829,914	116,196,197