Consolidated Statements of Operations - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenue:
Total Revenue	$ 53,064,000	$ 40,958,000	$ 36,822,000
Cost of Revenues:
Total Cost of revenue	27,266,000	20,031,000	18,528,000
Gross profit	25,798,000	20,927,000	18,294,000
Operating expenses:
Selling, general and administrative expenses	24,671,000	20,480,000	19,427,000
Research and development expenses	6,863,000	4,538,000	5,235,000
Total Operating expenses	31,534,000	25,018,000	24,662,000
Loss from operations	(5,736,000)	(4,091,000)	(6,368,000)
Interest income	262,000	253,000	285,000
Interest expense	(173,000)	(342,000)	(293,000)
Other (expense) income, net	(165,000)	(1,000)	6,000
Net loss before income taxes	(5,812,000)	(4,181,000)	(6,370,000)
Income tax benefit - sale of NJ R&D tax credits		311,000
Net loss	$ (5,812,000)	$ (3,870,000)	$ (6,370,000)
Net loss per share - basic and diluted	$ (0.34)	$ (0.26)	$ (0.49)
Weighted average common shares outstanding -basic and diluted	17,233,000	14,961,000	12,984,000
Products [Member]
Revenue:
Total Revenue	$ 36,897,000	$ 23,552,000	$ 21,366,000
Cost of Revenues:
Total Cost of revenue	22,638,000	13,453,000	14,036,000
Services [Member]
Revenue:
Total Revenue	16,167,000	17,406,000	15,456,000
Cost of Revenues:
Total Cost of revenue	$ 4,628,000	$ 6,578,000	$ 4,492,000