Statements Of Operations - USD ($)	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Revenue:
Systems	$ 218,895	$ 2,075,019
Disposables, service and accessories	6,758,777	6,572,987
Total revenue	6,977,672	8,648,006
Cost of revenue:
Systems	220,443	1,083,099
Disposables, service and accessories	1,036,182	1,097,715
Total cost of revenue	1,256,625	2,180,814
Gross margin	5,721,047	6,467,192
Operating expenses:
Research and development	1,158,434	1,473,086
Sales and marketing	3,625,601	3,894,113
General and administrative	2,839,870	2,586,791
Total operating expenses	7,623,905	7,953,990
Operating loss	(1,902,858)	(1,486,798)
Other income	3,129,308	31,294
Interest income	7	222
Interest expense	(49,490)	(819,019)
Net income (loss)	1,176,967	(2,274,301)
Cumulative dividend on convertible preferred stock	(363,188)
Net income attributable to convertible preferred stock	(509,323)
Earnings (net loss) attributable to common stockholders	$ 304,456	$ (2,274,301)
Earnings (net loss) per common share:
Basic	$ 0.01	$ (0.11)
Diluted	$ 0.01	$ (0.11)
Weighted average shares used in computing earnings (net loss) per common share:
Basic	22,318,000	21,611,612
Diluted	22,331,683	21,611,612