Statements Of Operations - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Revenue:
Systems	$ 10,640,584	$ 7,839,006
Disposables, service and accessories	27,033,940	27,172,270
Total revenue	37,674,524	35,011,276
Cost of revenue:
Systems	6,052,241	4,204,719
Disposables, service and accessories	4,385,917	4,018,661
Total cost of revenue	10,438,158	8,223,380
Gross margin	27,236,366	26,787,896
Operating expenses:
Research and development	6,252,791	5,158,331
Sales and marketing	15,850,362	15,168,940
General and administrative	10,543,741	11,845,289
Total operating expenses	32,646,894	32,172,560
Operating loss	(5,410,528)	(5,384,664)
Other income	1,340,057	3,510,439
Interest income	1,864	7,084
Interest expense	(3,284,168)	(3,335,300)
Net loss	$ (7,352,775)	$ (5,202,441)
Net loss per common share:
Basic	$ (0.35)	$ (0.26)
Diluted	$ (0.35)	$ (0.26)
Weighted average shares used in computing net loss per common share:
Basic	21,113,203	19,945,038
Diluted	21,113,203	19,945,038