Condensed Consolidated Statements of Stockholders Equity (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement of Stockholders' Equity [Abstract]
Stock issuance costs	$ 5	$ 332
Foreign currency translation adjustment	(33)	(54)
Net unrealized loss on marketable securities	(22)	(54)
Net loss	$ (28,436)	$ (22,906)