Statements Of Operations (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Revenue:
Systems	$ 12,743,218	$ 19,672,983	$ 15,585,538
Disposables, service and accessories	25,287,863	26,889,451	26,401,894
Total revenue	38,031,081	46,562,434	41,987,432
Cost of revenue:
Systems	6,870,954	9,905,528	8,576,283
Disposables, service and accessories	4,130,347	4,875,527	3,921,798
Total cost of revenue	11,001,301	14,781,055	12,498,081
Gross margin	27,029,780	31,781,379	29,489,351
Operating expenses:
Research and development	5,672,058	8,405,086	12,886,488
Sales and marketing	17,132,093	20,607,999	31,635,415
General and administrative	13,066,103	13,394,556	16,908,656
Total operating expenses	35,870,254	42,407,641	61,430,559
Operating loss	(8,840,474)	(10,626,262)	(31,941,208)
Other income (expense)	(47,349,378)	8,265,507	3,416,383
Interest income	5,800	7,361	9,052
Interest expense	(12,573,537)	(6,885,033)	(3,515,402)
Net loss	$ (68,757,589)	$ (9,238,427)	$ (32,031,175)
Net loss per common share:
Basic	$ (5.95)	$ (1.33)	$ (5.84)
Diluted	$ (5.95)	$ (1.33)	$ (5.84)
Weighted average shares used in computing net loss per common share:
Basic	11,554,566	6,944,928	5,482,627
Diluted	11,554,566	6,944,928	5,482,627