UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2018	Mar. 31, 2017
Revenue:
Collaboration revenue	$ 36	$ 2,432
Total revenue	36	2,432
Operating expenses:
Research and development expense	3,275	3,488
General and administrative expense	2,045	1,426
Total operating expenses	5,320	4,914
Operating loss	(5,284)	(2,482)
Other income (expense), net:
Interest expense	(161)	(204)
Other income (loss), net	(64)	34
Total other income (loss), net	(225)	(170)
Net loss	$ (5,509)	$ (2,652)
Basic and diluted loss per common share (in dollars per share)	$ (0.14)	$ (15.62)
Basic and diluted weighted-average common shares outstanding (in shares)	39,357,289	169,794

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.

No definition available.