Statements Of Operations - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Revenue:
Systems	$ 5,776,843	$ 10,640,584
Disposables, service and accessories	26,387,273	27,033,940
Total revenue	32,164,116	37,674,524
Cost of revenue:
Systems	3,660,012	6,052,241
Disposables, service and accessories	3,869,321	4,385,917
Total cost of revenue	7,529,333	10,438,158
Gross margin	24,634,783	27,236,366
Operating expenses:
Research and development	5,487,609	6,252,791
Sales and marketing	15,228,193	15,850,362
General and administrative	10,345,338	10,543,741
Total operating expenses	31,061,140	32,646,894
Operating loss	(6,426,357)	(5,410,528)
Other income (expense)	(2,009,150)	1,340,057
Interest income	368	1,864
Interest expense	(2,483,752)	(3,284,168)
Gain on extinguishment of debt	5,632,171
Net loss	(5,286,720)	(7,352,775)
Deemed dividend on convertible preferred stock	(6,145,402)
Cumulative dividend on convertible preferred stock	(368,152)
Net loss available to common stockholders	$ (11,800,274)	$ (7,352,775)
Net loss per common share:
Basic	$ (0.54)	$ (0.35)
Diluted	$ (0.54)	$ (0.35)
Weighted average shares used in computing net loss per common share:
Basic	21,807,634	21,113,203
Diluted	21,807,634	21,113,203