Statements of Operations (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Revenue:
Sublease	$ 241,065
Total revenue	7,009,875	6,971,632
Cost of revenue:
Sublease	246,530
Total cost of revenue	1,412,053	1,265,347
Gross margin	5,597,822	5,706,285
Operating expenses:
Research and development	2,959,219	1,962,626
Sales and marketing	3,309,829	3,634,997
General and administrative	1,468,160	1,239,179
Total operating expenses	7,737,208	6,836,802
Operating loss	(2,139,386)	(1,130,517)
Other income		2,590,361
Interest income (expense)	16,566	(24,615)
Net income (loss)	(2,122,820)	1,435,229
Cumulative dividend on convertible preferred stock	(353,510)	(353,589)
Net income attributable to convertible preferred stock		(610,280)
Earnings (loss) attributable to common stockholders	$ (2,476,330)	$ 471,360
Net income (loss) per share attributable to common stockholders:
Basic	$ (0.04)	$ 0.02
Diluted	$ (0.04)	$ 0.01
Weighted average number of common shares and equivalents:
Basic	59,196,652	30,957,648
Diluted	59,196,652	33,122,598
Systems [Member]
Revenue:
Total revenue	$ 58,051	$ 17,275
Cost of revenue:
Total cost of revenue	51,163	203,602
Disposables, Service and Accessories [Member]
Revenue:
Total revenue	6,710,759	6,954,357
Cost of revenue:
Total cost of revenue	$ 1,114,360	$ 1,061,745