Condensed Consolidated Statements of Operations (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Revenue:
Products	$ 6,966,000	$ 11,273,000	$ 16,044,000	$ 21,745,000
Services	4,239,000	4,206,000	12,545,000	12,227,000
Revenue, Net, Total	11,205,000	15,479,000	28,589,000	33,972,000
Cost of revenue:
Cost of products	3,853,000	5,385,000	9,552,000	11,658,000
Cost of services	1,535,000	1,497,000	4,534,000	4,221,000
Cost of Goods and Services Sold, Total	5,388,000	6,882,000	14,086,000	15,879,000
Gross profit	5,817,000	8,597,000	14,503,000	18,093,000
Operating expenses:
Selling, general and administrative expenses	4,981,000	5,467,000	16,092,000	16,727,000
Research and development expenses	1,082,000	1,098,000	3,345,000	3,297,000
Operating Expenses, Total	6,063,000	6,565,000	19,437,000	20,024,000
Income (loss) from operations	(246,000)	2,032,000	(4,934,000)	(1,931,000)
Interest income	160,000	116,000	484,000	335,000
Other income, net	10,000	19,000	45,000	50,000
Net income (loss)	$ (76,000)	$ 2,167,000	$ (4,405,000)	$ (1,546,000)
Net income (loss) per share - basic (in dollars per share)	$ (0.01)	$ 0.18	$ (0.37)	$ (0.13)
Net income (loss) per share - diluted (in dollars per share)	$ (0.01)	$ 0.18	$ (0.37)	$ (0.13)
Weighted average common sharesoutstanding - basic (in shares)	11,930,000	11,768,000	11,886,000	11,730,000
Weighted average common sharesoutstanding - diluted (in shares)	11,930,000	12,141,000	11,886,000	11,730,000