CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Revenue
Total revenue	$ 1,589,733	$ 804,356
Operating expenses
Cost of product revenue	864,943	464,161
Research and development	1,421,360	757,866
Sales and marketing	1,565,124	1,712,190
General and administrative	3,513,414	2,998,400
Total operating expenses	7,364,841	5,932,617
Loss from operations	(5,775,108)	(5,128,261)
Interest expense	(547,130)	(602,022)
Other income, net	6,384	297,500
Change in fair value of warrants, derivative liability and conversion option liability	(46,057)	(263,854)
Loss on extinguishment of debt	(1,941,960)
Net loss	(8,303,871)	(5,696,637)
Deemed dividend attributable to preferred stock		995,000
Net loss attributable to common shareholders	$ (8,303,871)	$ (6,691,637)
Net loss per share, basic and diluted (in dollars per share)	$ (0.24)	$ (0.75)
Weighted-average common shares outstanding, basic and diluted (in shares)	34,524,145	8,631,142
Product revenue, net
Revenue
Total revenue	$ 1,589,733	$ 626,967
Collaboration revenue
Revenue
Total revenue		$ 177,389