Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Operating expenses:
Research and development	$ 6,498	$ 4,921	$ 12,087	$ 10,940
General and administrative	2,669	2,492	5,169	5,112
Total operating expenses	9,167	7,413	17,256	16,052
Loss from operations	(9,167)	(7,413)	(17,256)	(16,052)
Other (expense) income:
Change in fair value of term loan derivative liability	40		34
Other expense	(375)		(375)
Interest income	2	14	5	171
Interest expense	(296)		(590)
Total other (expense) income, net	(629)	14	(926)	171
Loss before income taxes	(9,796)	(7,399)	(18,182)	(15,881)
Income tax benefit	2	15	17	24
Net loss	$ (9,794)	$ (7,384)	$ (18,165)	$ (15,857)
Basic and diluted net loss per common share outstanding	$ (0.49)	$ (0.41)	$ (0.92)	$ (0.89)
Weighted average common shares used in net loss per share attributable to common stockholders, basic and diluted	20,123,461	17,835,952	19,772,201	17,835,261

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.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 45
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=121326447&loc=d3e1337-109256