Unaudited Statements of Operations and Comprehensive Loss - USD ($)	3 Months Ended	9 Months Ended
Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Statements of Operations and Comprehensive Loss
Revenue
Costs and expenses:
Research and development expense	10,724,178	9,729,089	35,562,202	28,052,777
General and administrative expense	3,380,932	2,790,431	10,491,991	8,492,194
Total costs and expenses	14,105,110	12,519,520	46,054,193	36,544,971
Loss from operations	(14,105,110)	(12,519,520)	(46,054,193)	(36,544,971)
Interest income	853,228	944,409	2,888,599	2,178,253
Net loss and comprehensive loss	$ (13,251,882)	$ (11,575,111)	$ (43,165,594)	$ (34,366,718)
Basic and diluted net loss per common share (in dollars per share)	$ (0.31)	$ (0.27)	$ (1.00)	$ (0.85)
Basic and diluted weighted average number of common shares (in shares)	43,295,397	43,069,282	43,215,125	40,345,071

The amount of net income or loss for the period per each share in instances when basic and diluted earnings per share are the same amount and reported as a single line item on the face of the financial statements. Basic earnings per share is the amount of net income or loss for the period per each share of common stock or unit outstanding during the reporting period. Diluted earnings per share includes the amount of net income or loss for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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