Condensed Consolidated Statements of Operations (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Revenue:
Products	$ 11,273,000	$ 6,912,000	$ 21,745,000	$ 14,675,000
Services	4,206,000	4,372,000	12,227,000	12,776,000
Revenue, Net	15,479,000	11,284,000	33,972,000	27,451,000
Cost of revenue:
Cost of products	5,385,000	3,833,000	11,658,000	8,359,000
Cost of services	1,497,000	1,529,000	4,221,000	4,531,000
Cost of Goods and Services Sold, Total	6,882,000	5,362,000	15,879,000	12,890,000
Gross profit	8,597,000	5,922,000	18,093,000	14,561,000
Operating expenses:
Selling, general and administrative expenses	5,467,000	5,669,000	16,727,000	16,490,000
Research and development expenses	1,098,000	827,000	3,297,000	2,603,000
Operating Costs and Expenses	6,565,000	6,496,000	20,024,000	19,093,000
(Loss) income from operations	2,032,000	(574,000)	(1,931,000)	(4,532,000)
Interest income	116,000	60,000	335,000	160,000
Other income, net	19,000	300,000	50,000	350,000
Net (loss) income	$ 2,167,000	$ (214,000)	$ (1,546,000)	$ (4,022,000)
Net (loss) income per share - basic (in dollars per share)	$ 0.18	$ (0.02)	$ (0.13)	$ (0.37)
Net (loss) income per share - diluted (in dollars per share)	$ 0.18	$ (0.02)	$ (0.13)	$ (0.37)
Weighted average common shares outstanding - basic (in shares)	11,768,000	11,173,000	11,730,000	10,969,000
Weighted average common shares outstanding - diluted (in shares)	12,141,000	11,173,000	11,730,000	10,969,000