CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2022	Mar. 31, 2021
Income Statement [Abstract]
Revenue	$ 3,317	$ 16,349
Operating expenses
Research and development	19,972	25,593
General and administrative	10,691	9,498
Total operating expenses	30,663	35,091
Operating loss	(27,346)	(18,742)
Other income (expense):
Loss from equity method investments	(952)
Interest expense	(42)
Interest income	172	53
Total other income (expense), net	(822)	53
Net loss and net loss attributable to common stockholders	$ (28,168)	$ (18,689)
Net loss per share attributable to common stockholders- basic and diluted	$ (0.46)	$ (0.33)
Weighted average shares of common stock outstanding- basic and diluted	61,031,775	56,625,024

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=125511455&loc=d3e1337-109256