Condensed Consolidated Statements of Operations - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Revenue:
Products	$ 6,947,000	$ 7,292,000	$ 18,811,000	$ 20,243,000
Services	3,634,000	4,447,000	12,816,000	12,645,000
Revenue, Net, Total	10,581,000	11,739,000	31,627,000	32,888,000
Cost of revenue:
Cost of products	4,929,000	4,653,000	13,643,000	12,724,000
Cost of services	1,296,000	1,615,000	5,554,000	4,585,000
Cost of Goods and Services Sold, Total	6,225,000	6,268,000	19,197,000	17,309,000
Gross profit	4,356,000	5,471,000	12,430,000	15,579,000
Operating expenses:
Selling, general and administrative expenses	5,207,000	6,289,000	18,201,000	18,760,000
Research and development expenses	1,114,000	1,770,000	3,463,000	4,263,000
Operating Expenses, Total	6,321,000	8,059,000	21,664,000	23,023,000
Loss from operations	(1,965,000)	(2,588,000)	(9,234,000)	(7,444,000)
Interest income	85,000	140,000	264,000	445,000
Other income, net	(15,000)	4,000	(12,000)	19,000
Net loss	$ (1,895,000)	$ (2,444,000)	$ (8,982,000)	$ (6,980,000)
Net loss per share - basic and diluted (in dollars per share)	$ (0.15)	$ (0.20)	$ (0.72)	$ (0.58)
Weighted average common shares outstanding -basic and diluted (in shares)	12,768,000	12,107,000	12,523,000	12,072,000