CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Revenues:
Product sales	$ 6,187,368	$ 7,197,163	$ 18,949,833	$ 17,116,750
Services	1,944,074	2,387,885	5,809,887	7,166,263
Total revenues	8,131,442	9,585,048	24,759,720	24,283,013
Cost of revenues:
Product cost of revenues	2,743,243	4,207,639	8,842,103	9,034,874
Services cost of revenues	1,308,178	1,422,766	3,904,025	4,275,137
Total cost of revenues	4,051,421	5,630,405	12,746,128	13,310,011
Gross profit	4,080,021	3,954,643	12,013,592	10,973,002
Operating expenses:
Selling and marketing	2,944,342	2,981,405	9,410,819	9,001,702
General and administrative	2,913,967	1,637,773	7,447,120	5,456,161
Engineering and product development	410,676	272,013	1,310,329	891,102
Total operating expenses	6,268,985	4,891,191	18,168,268	15,348,965
Loss from operations	(2,188,964)	(936,548)	(6,154,676)	(4,375,963)
Other income (expense):
Interest expense, net	(960,960)	(863,713)	(2,739,116)	(2,402,557)
Change in fair value of warrants	(131,262)	(34,839)	(1,441,672)	(132,795)
Net loss	$ (3,281,186)	$ (1,835,100)	$ (10,335,464)	$ (6,911,315)
Basic and diluted net loss per share (in dollars per share)	$ (1.09)	$ (0.66)	$ (3.60)	$ (2.74)
Shares used in computing basic and diluted net loss per share (in shares)	3,015,248	2,772,637	2,868,619	2,523,838