CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Revenue:
Product	$ 160	$ 1,182	$ 438	$ 1,279
Maintenance	652	703	1,305	1,322
Revenues	812	1,885	1,743	2,601
Cost of revenue:
Product	34	139	117	165
Maintenance	106	167	226	390
Gross profit	672	1,579	1,400	2,046
Operating expense:
General and administrative	894	970	2,001	2,141
Sales and marketing	934	816	1,939	1,680
Research and development	1,840	1,865	3,614	3,664
Depreciation and amortization	17	11	36	24
Total	3,685	3,662	7,590	7,509
Loss from operations	(3,013)	(2,083)	(6,190)	(5,463)
Interest expense (income), net	(31)	184	(53)	356
Other expense	1	0	1	0
Change in fair value of derivative liabilities	(481)	0	(57)	0
Other components of net periodic pension expense	45	17	78	49
Loss before income taxes	(2,547)	(2,284)	(6,159)	(5,868)
Income tax expense	1	0	1	1
Net loss	(2,548)	(2,284)	(6,160)	(5,869)
Preferred dividends, deemed dividend accretion	(1,374)	(720)	(2,668)	(1,489)
Net loss available to common shareholders	$ (3,922)	$ (3,004)	$ (8,828)	$ (7,358)
Basic income and diluted loss per common share - see Note 3:
Net loss	$ (0.03)	$ (0.02)	$ (0.06)	$ (0.06)
Preferred dividends, deemed dividend accretion	(0.01)	(0.01)	(0.03)	(0.02)
Basic and diluted loss per share available to common shareholders	$ (0.04)	$ (0.03)	$ (0.09)	$ (0.08)
Basic and diluted weighted-average shares outstanding	103,431,623	95,161,570	100,928,835	94,749,904