Statements Of Operations - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Revenue:
Systems	$ 17,275	$ 218,895
Disposables, service and accessories	6,954,357	6,758,777
Total revenue	6,971,632	6,977,672
Cost of revenue:
Systems	203,602	220,443
Disposables, service and accessories	1,061,745	1,036,182
Total cost of revenue	1,265,347	1,256,625
Gross margin	5,706,285	5,721,047
Operating expenses:
Research and development	1,962,626	1,600,877
Sales and marketing	3,634,997	3,781,448
General and administrative	1,239,179	2,241,580
Total operating expenses	6,836,802	7,623,905
Operating loss	(1,130,517)	(1,902,858)
Other income	2,590,361	3,129,308
Interest expense (net)	(24,615)	(49,483)
Net income	1,435,229	1,176,967
Cumulative dividend on convertible preferred stock	(353,589)	(363,188)
Net income attributable to convertible preferred stockholders	(610,280)	(509,323)
Net income attributable to common stockholders	$ 471,360	$ 304,456
Net income per share attributable to common stockholders:
Basic	$ 0.02	$ 0.01
Diluted	$ 0.01	$ 0.01
Weighted average number of common shares and equivalents:
Basic	30,957,648	22,318,000
Diluted	33,122,598	22,331,683