Condensed Statements of Operations - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Revenue:
Product and product-related services	$ 1,733,546	$ 1,371,169
Collaborative development services	2,425,106
Total revenue	4,158,652	1,371,169
Cost of revenue	1,137,063	1,295,302
Gross margin	3,021,589	75,867
Operating expenses:
Selling, general and administrative	5,657,832	4,238,467
Research and development	2,589,286	1,267,063
Total operating expenses	8,247,118	5,505,530
Operating loss	(5,225,529)	(5,429,663)
Other income (expense):
Interest expense	(182,517)	(398,420)
Interest income	133,163	12,089
Loss on extinguishment of Growth Term Loan	(105,064)
Total other income (expense)	(154,418)	(386,331)
Net loss before income taxes	(5,379,947)	(5,815,994)
Provision for income taxes		280
Net loss	$ (5,379,947)	$ (5,816,274)
Net loss per share, basic and diluted	$ (0.22)	$ (0.73)
Shares used in computing net loss per share, basic and diluted	24,704,128	7,971,097