Condensed Statements of Operations - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Revenue:
Product and product-related services	$ 2,023,312	$ 1,458,345	$ 3,756,858	$ 2,829,514
Collaborative development services	2,887,454	302,411	5,312,560	302,411
Total revenue	4,910,766	1,760,756	9,069,418	3,131,925
Cost of revenue	1,450,682	1,236,904	2,587,745	2,532,206
Gross margin	3,460,084	523,852	6,481,673	599,719
Operating expenses:
Selling, general and administrative	4,764,751	4,413,437	10,422,583	8,651,904
Research and development	2,758,984	1,618,889	5,348,270	2,885,952
Total operating expenses	7,523,735	6,032,326	15,770,853	11,537,856
Operating loss	(4,063,651)	(5,508,474)	(9,289,180)	(10,938,137)
Other income (expense):
Interest expense	(233,306)	(350,058)	(415,823)	(748,478)
Interest income	197,773	17,630	330,936	29,719
Loss on extinguishment of Growth Term Loan			(105,064)
Total other income (expense)	(35,533)	(332,428)	(189,951)	(718,759)
Net loss before income taxes	(4,099,184)	(5,840,902)	(9,479,131)	(11,656,896)
Provision for income taxes	3,545		3,545	280
Net loss	$ (4,102,729)	$ (5,840,902)	$ (9,482,676)	$ (11,657,176)
Net loss per share, basic and diluted	$ (0.14)	$ (0.60)	$ (0.36)	$ (1.31)
Shares used in computing net loss per share, basic and diluted	28,375,379	9,769,322	26,549,895	8,875,177