Condensed Consolidated Statements of Operations - USD ($) shares in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Revenues
Product revenues	$ 10,074,000	$ 7,726,000
Service revenues	5,450,000	3,521,000
Total revenues	15,524,000	11,247,000
Cost of product revenues	6,016,000	4,313,000
Cost of service revenues	3,010,000	2,243,000
Total cost of revenues	9,026,000	6,556,000
Gross profit	6,498,000	4,691,000
Operating expenses
Sales and marketing	419,000	379,000
Research and development	974,000	1,346,000
General and administrative	4,089,000	4,421,000
Total operating expenses	5,482,000	6,146,000
Income (loss) from operations	1,016,000	(1,455,000)
Interest expense, net	(45,000)	(28,000)
Other income, net	(199,000)	42,000
Total non-operating (expense) income	(244,000)	14,000
Income (loss) before income taxes	772,000	(1,441,000)
Income tax (benefit) expense	0	0
Net income (loss)	772,000	(1,441,000)
Adjustments attributable to preferred stockholders		(7,000)
Net income (loss) available to common stockholders	$ 772,000	$ (1,448,000)
Basic net income (loss) per common share	$ 0.07	$ (0.13)
Diluted net income (loss) per common share	$ 0.06	$ (0.13)
Basic weighted average common shares outstanding	10,943	10,803
Diluted weighted average common shares outstanding	12,287	10,803