Condensed Consolidated Statements of Operations (Unaudited) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Revenue:
Products	$ 4,561,000	$ 6,947,000	$ 15,761,000	$ 18,811,000
Services	3,654,000	3,634,000	11,835,000	12,816,000
Revenue, Net, Total	8,215,000	10,581,000	27,596,000	31,627,000
Cost of revenue:
Cost of products	3,018,000	4,929,000	10,346,000	13,643,000
Cost of services	1,195,000	1,296,000	3,325,000	5,554,000
Cost of Goods and Services Sold, Total	4,213,000	6,225,000	13,671,000	19,197,000
Gross profit	4,002,000	4,356,000	13,925,000	12,430,000
Operating expenses:
Selling, general and administrative expenses	4,984,000	5,207,000	14,789,000	18,201,000
Research and development expenses	1,098,000	1,114,000	3,420,000	3,463,000
Operating Expenses, Total	6,082,000	6,321,000	18,209,000	21,664,000
Loss from operations	(2,080,000)	(1,965,000)	(4,284,000)	(9,234,000)
Interest income	65,000	85,000	218,000	264,000
Interest expense	(78,000)		(222,000)
Other income, net	1,000	(15,000)	1,000	(12,000)
Net loss	$ (2,092,000)	$ (1,895,000)	$ (4,287,000)	$ (8,982,000)
Net loss per share - basic and diluted	$ (0.16)	$ (0.15)	$ (0.33)	$ (0.72)
Weighted average common shares outstanding - basic and diluted	13,004,000	12,768,000	12,946,000	12,523,000