Statements Of Operations (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Revenue:
Systems	$ 5,040,025	$ 2,037,742	$ 14,082,637	$ 11,350,461
Disposables, service and accessories	6,521,374	6,506,272	20,274,888	19,020,396
Total revenue	11,561,399	8,544,014	34,357,525	30,370,857
Cost of revenue:
Systems	2,429,764	1,723,874	6,948,145	6,428,783
Disposables, service and accessories	1,057,057	933,380	3,560,585	2,749,796
Total cost of revenue	3,486,821	2,657,254	10,508,730	9,178,579
Gross margin	8,074,578	5,886,760	23,848,795	21,192,278
Operating expenses:
Research and development	1,904,648	3,529,321	6,925,928	10,234,757
Sales and marketing	4,096,842	6,885,786	16,318,911	24,936,641
General and administrative	3,007,598	4,527,489	10,349,817	13,384,313
Total operating expenses	9,009,088	14,942,596	33,594,656	48,555,711
Operating loss	(934,510)	(9,055,836)	(9,745,861)	(27,363,433)
Other income (expense)	598,494	2,611,067	9,679,848	3,251,822
Interest income	1,982	1,817	5,353	7,137
Interest expense	(1,581,247)	(830,118)	(4,861,106)	(2,413,214)
Net loss	$ (1,915,281)	$ (7,273,070)	$ (4,921,766)	$ (26,517,688)
Net earnings (loss) per common share:
Basic	$ (0.25)	$ (1.33)	$ (0.74)	$ (4.84)
Diluted	$ (0.25)	$ (1.33)	$ (0.74)	$ (4.84)
Weighted average shares used in computing net earnings (loss) per common share:
Basic	7,701,332	5,487,824	6,651,255	5,479,351
Diluted	7,701,332	5,487,824	6,651,255	5,479,351