CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Total revenue	$ 164,705	$ 245,502	$ 269,682	$ 424,084
Costs and expenses:
Cost of product revenue	36,148	179,945	83,477	263,879
Research and development	29,294	6,174,589	31,000	10,854,770
Selling, general and administrative	1,497,401	2,994,649	3,796,986	6,691,936
Total costs and expenses	1,562,843	9,349,183	3,911,463	17,810,585
Loss from operations	(1,398,138)	(9,103,681)	(3,641,781)	(17,386,501)
Interest income, net	13,361	51,809	26,574	111,402
Net loss	(1,384,777)	(9,051,872)	(3,615,207)	(17,275,099)
Net loss attributable to common stockholders	$ (1,384,777)	$ (9,051,872)	$ (3,615,207)	$ (17,275,099)
Net loss per share attributable to common stockholders - basic and diluted (in usd per share)	$ (0.08)	$ (0.50)	$ (0.20)	$ (0.96)
Weighted-average number of common shares outstanding — basic and diluted (shares)	18,068,429	18,037,274	18,068,120	17,965,989
Net product revenue
Total revenue	$ 163,071	$ 241,416	$ 267,291	$ 417,671
Other revenue
Total revenue	$ 1,634	$ 4,086	$ 2,391	$ 6,413