CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Revenues:
Product sales	$ 6,386,104	$ 5,465,897	$ 12,762,465	$ 9,919,587
Services	2,019,452	2,545,140	3,865,813	4,778,378
Total revenues	8,405,556	8,011,037	16,628,278	14,697,965
Cost of revenues:
Product cost of revenues	3,040,471	2,597,821	6,098,861	4,797,431
Services cost of revenues	1,261,872	1,487,448	2,595,846	2,882,175
Total cost of revenues	4,302,343	4,085,269	8,694,707	7,679,606
Gross profit	4,103,213	3,925,768	7,933,571	7,018,359
Operating expenses:
Selling and marketing	3,167,965	2,888,362	6,466,477	6,020,296
General and administrative	2,719,818	1,866,451	4,533,153	3,818,390
Engineering and product development	443,327	279,811	899,652	619,088
Total operating expenses	6,331,110	5,034,624	11,899,282	10,457,774
Loss from operations	(2,227,897)	(1,108,856)	(3,965,711)	(3,439,415)
Other income (expense):
Interest expense, net	(891,080)	(885,001)	(1,778,157)	(1,538,844)
Change in fair value of warrants	(1,026,888)	833,425	(1,310,410)	(97,956)
Net loss	$ (4,145,865)	$ (1,160,432)	$ (7,054,278)	$ (5,076,215)
Basic and diluted net loss per share (in dollars per share)	$ (1.44)	$ (0.45)	$ (2.47)	$ (2.12)
Shares used in computing basic and diluted net loss per share (in shares)	2,878,963	2,555,516	2,859,345	2,397,620