Condensed Consolidated Statements of Operations (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Revenue:
Products	$ 5,303,000	$ 4,761,000	$ 9,078,000	$ 10,472,000
Services	4,067,000	3,920,000	8,306,000	8,021,000
Revenue, Net, Total	9,370,000	8,681,000	17,384,000	18,493,000
Cost of revenue:
Cost of products	3,005,000	2,810,000	5,699,000	6,273,000
Cost of services	1,515,000	1,321,000	2,999,000	2,724,000
Cost of Goods and Services Sold, Total	4,520,000	4,131,000	8,698,000	8,997,000
Gross profit	4,850,000	4,550,000	8,686,000	9,496,000
Operating expenses:
Selling, general and administrative expenses	5,595,000	5,671,000	11,111,000	11,260,000
Research and development expenses	1,123,000	1,085,000	2,263,000	2,199,000
Operating Expenses	6,718,000	6,756,000	13,374,000	13,459,000
Loss from operations	(1,868,000)	(2,206,000)	(4,688,000)	(3,963,000)
Interest income	159,000	130,000	324,000	219,000
Other income, net	2,000	10,000	35,000	31,000
Net loss	$ (1,707,000)	$ (2,066,000)	$ (4,329,000)	$ (3,713,000)
Net loss per share - basic and diluted (in dollars per share)	$ (0.14)	$ (0.18)	$ (0.36)	$ (0.32)
Weighted average common shares outstanding - basic and diluted (in shares)	11,887,000	11,701,000	11,863,000	11,710,000